Fix LCD Communicaiton infinite looping upon failed commands

Fix Infinite Loop Bug, Melody Download crashes and dwnld skip if melody is builin.
Fixed Infinite Play bug
2026-02-10 18:45:41 +02:00 · 2026-02-04 17:00:27 +02:00 · 2026-02-03 15:46:47 +02:00 · 2026-01-28 10:28:05 +02:00 · 2026-01-19 21:24:35 +02:00 · 2026-01-19 19:02:25 +02:00
29 changed files with 3054 additions and 447 deletions
--- a/vesper/documentation/API_Reference.md
+++ b/vesper/documentation/API_Reference.md
@@ -0,0 +1,828 @@
+# 🔔 VESPER ESP32 Communication API Reference v3.0
+
+> **Complete command reference for Vesper Bell Automation System with Grouped Commands**  
+> Version: 3.0 | Updated: 2025-09-15  
+> Supports: MQTT + WebSocket protocols with multi-client support and batch processing
+
+---
+
+## 🚀 Getting Started
+
+### Connection Protocols
+- **MQTT**: `vesper/{device_id}/control` (commands) → `vesper/{device_id}/data` (responses)
+- **WebSocket**: `ws://{esp_ip}/ws` (bidirectional)
+- **UDP Discovery**: Broadcast on configured port for device discovery
+- **UDP Port**: 32101
+
+### WebSocket Client Identification
+**Required for WebSocket clients to receive targeted messages:**
+
+```json
+{
+  "cmd": "system",
+  "contents": {
+    "action": "identify",
+    "device_type": "master"    // or "secondary"
+  }
+}
+```
+
+**Response:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "identify",
+  "payload": "Device identified as master"
+}
+```
+
+---
+
+## 📋 Command Categories (NEW GROUPED ARCHITECTURE)
+
+- [🖥️ System Commands](#️-system-commands)
+- [🎵 Playback Control](#-playback-control)
+- [📁 File Management](#-file-management)
+- [🔧 Relay Setup](#-relay-setup)
+- [🕐 Clock Setup](#-clock-setup)
+- [📢 Information Messages](#-information-messages)
+- [🌐 Network & Discovery](#-network--discovery)
+- [🔄 Legacy Command Support](#-legacy-command-support)
+
+---
+
+## 🖥️ System Commands
+
+### 🏓 Ping Test
+
+**Command:**
+```json
+{
+  "cmd": "system",
+  "contents": {
+    "action": "ping"
+  }
+}
+```
+
+**Response:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "pong",
+  "payload": ""
+}
+```
+
+### 📊 System Status
+
+**Command:**
+```json
+{
+  "cmd": "system",
+  "contents": {
+    "action": "status"
+  }
+}
+```
+
+**Response:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "current_status",
+  "payload": {
+    "player_status": "playing",
+    "time_elapsed": 45230,
+    "projected_run_time": 34598,
+    "timestamp": 1699123456789
+  }
+}
+```
+
+### 👤 Device Identification (WebSocket Only)
+
+**Command:**
+```json
+{
+  "cmd": "system",
+  "contents": {
+    "action": "identify",
+    "device_type": "master"
+  }
+}
+```
+
+### 🔄 Restart Device
+
+**Command:**
+```json
+{
+  "cmd": "system",
+  "contents": {
+    "action": "restart"
+  }
+}
+```
+
+**Response:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "restart",
+  "payload": "Device will restart in 2 seconds"
+}
+```
+
+**Note:** Device will reboot after sending the response.
+
+### 🔄 Force OTA Update
+
+**Command:**
+```json
+{
+  "cmd": "system",
+  "contents": {
+    "action": "force_update",
+    "channel": "stable"  // optional: "stable", "beta", or "emergency" (default: "stable")
+  }
+}
+```
+
+**Response:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "force_update",
+  "payload": "Starting forced OTA update from channel: stable. Device may reboot."
+}
+```
+
+**Error Response (if player is active):**
+```json
+{
+  "status": "ERROR",
+  "type": "force_update",
+  "payload": "Cannot update while playback is active"
+}
+```
+
+**Note:** If update is successful, device will reboot automatically.
+
+### 🔥 Custom Firmware Update
+
+**Command:**
+```json
+{
+  "cmd": "system",
+  "contents": {
+    "action": "custom_update",
+    "firmware_url": "https://example.com/path/to/firmware.bin",
+    "checksum": "a1b2c3d4e5f6...",  // optional: SHA256 checksum for verification
+    "file_size": 1234567,           // optional: expected file size in bytes
+    "version": 145                  // optional: firmware version number to save in NVS
+  }
+}
+```
+
+**Response:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "custom_update",
+  "payload": "Starting custom OTA update. Device may reboot."
+}
+```
+
+**Error Responses:**
+```json
+{
+  "status": "ERROR",
+  "type": "custom_update",
+  "payload": "Missing firmware_url parameter"
+}
+```
+
+```json
+{
+  "status": "ERROR",
+  "type": "custom_update",
+  "payload": "Cannot update while playback is active"
+}
+```
+
+**Features:**
+- Download firmware from any URL (bypasses configured update servers)
+- Optional SHA256 checksum verification
+- Optional file size validation
+- Optional version number to update NVS (prevents unwanted auto-downgrades)
+- Automatically blocks updates during playback
+- Device reboots on successful installation
+
+**Version Parameter Behavior:**
+- If `version` is provided (> 0): NVS firmware version will be updated to this value
+- If `version` is omitted or 0: NVS firmware version remains unchanged
+- **Important:** Without version parameter, future OTA checks may detect your custom firmware as "outdated" and trigger auto-updates/downgrades
+
+**Note:** If update is successful, device will reboot automatically. Use with caution!
+
+---
+
+## 🎵 Playback Control
+
+### ▶️ Start Playback
+
+**Command:**
+```json
+{
+  "cmd": "playback",
+  "contents": {
+    "action": "play",
+    "name": "My Melody",
+    "uid": "01DegzV9FA8tYbQpkIHR",
+    "url": "https://example.com/melody.bin",
+    "speed": 500,
+    "note_assignments": [1, 2, 3, 4, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+    "segment_duration": 15000,
+    "pause_duration": 5000,
+    "total_duration": 60000,
+    "continuous_loop": true
+  }
+}
+```
+
+### ⏹️ Stop Playback
+
+**Command:**
+```json
+{
+  "cmd": "playback",
+  "contents": {
+    "action": "stop"
+  }
+}
+```
+
+---
+
+## 📁 File Management
+
+### 📋 List Available Melodies
+
+**Command:**
+```json
+{
+  "cmd": "file_manager",
+  "contents": {
+    "action": "list_melodies"
+  }
+}
+```
+
+**Success Response:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "list_melodies",
+  "payload": ["melody1.bin", "melody2.bin", "melody3.bin"]
+}
+```
+
+### 📥 Download Melody
+
+**Command:**
+```json
+{
+  "cmd": "file_manager",
+  "contents": {
+    "action": "download_melody",
+    "download_url": "https://example.com/melody.bin",
+    "melodys_uid": "01DegzV9FA8tYbQpkIHR",
+    "name": "Optional Display Name"
+  }
+}
+```
+
+### 🗑️ Delete Melody
+
+**Command:**
+```json
+{
+  "cmd": "file_manager",
+  "contents": {
+    "action": "delete_melody",
+    "name": "01DegzV9FA8tYbQpkIHR"
+  }
+}
+```
+
+---
+
+## 🔧 Relay Setup
+
+### ⏱️ Set Relay Timers (Single Bell)
+
+**Command:**
+```json
+{
+  "cmd": "relay_setup",
+  "contents": {
+    "action": "set_timers",
+    "b1": 100,
+    "b2": 200,
+    "b3": 150
+  }
+}
+```
+
+### ⏱️ Set Relay Timers (Batch Mode)
+
+**Command:**
+```json
+{
+  "cmd": "relay_setup",
+  "contents": {
+    "action": "set_timers",
+    "timers": {
+      "b1": 100,
+      "b2": 200,
+      "b3": 150,
+      "b4": 300,
+      "b5": 250,
+      "b6": 180
+    }
+  }
+}
+```
+
+### 🔌 Set Relay Outputs (Single Bell)
+
+**Command:**
+```json
+{
+  "cmd": "relay_setup",
+  "contents": {
+    "action": "set_outputs",
+    "b1": 1,
+    "b2": 2,
+    "b3": 3
+  }
+}
+```
+
+### 🔌 Set Relay Outputs (Batch Mode)
+
+**Command:**
+```json
+{
+  "cmd": "relay_setup",
+  "contents": {
+    "action": "set_outputs",
+    "outputs": {
+      "b1": 1,
+      "b2": 2,
+      "b3": 3,
+      "b4": 4,
+      "b5": 5,
+      "b6": 6
+    }
+  }
+}
+```
+
+---
+
+## 🕐 Clock Setup
+
+### 🔌 Set Clock Outputs
+
+**Command:**
+```json
+{
+  "cmd": "clock_setup",
+  "contents": {
+    "action": "set_outputs",
+    "c1": 1,
+    "c2": 2
+  }
+}
+```
+
+### ⏰ Set Clock Timings
+
+**Command:**
+```json
+{
+  "cmd": "clock_setup",
+  "contents": {
+    "action": "set_timings",
+    "pulseDuration": 5000,
+    "pauseDuration": 2000
+  }
+}
+```
+
+### 🔔 Set Clock Alerts
+
+**Command:**
+```json
+{
+  "cmd": "clock_setup",
+  "contents": {
+    "action": "set_alerts",
+    "alertType": "HOURS",
+    "alertRingInterval": 1000,
+    "hourBell": 1,
+    "halfBell": 2,
+    "quarterBell": 3
+  }
+}
+```
+
+### 💡 Set Clock Backlight
+
+**Command:**
+```json
+{
+  "cmd": "clock_setup",
+  "contents": {
+    "action": "set_backlight",
+    "enabled": true,
+    "output": 5,
+    "onTime": "18:00",
+    "offTime": "06:00"
+  }
+}
+```
+
+### 🔇 Set Clock Silence Periods
+
+**Command:**
+```json
+{
+  "cmd": "clock_setup",
+  "contents": {
+    "action": "set_silence",
+    "daytime": {
+      "enabled": true,
+      "onTime": "13:00",
+      "offTime": "15:00"
+    },
+    "nighttime": {
+      "enabled": true,
+      "onTime": "22:00",
+      "offTime": "07:00"
+    }
+  }
+}
+```
+
+### 🚀 Batch Clock Setup (Multiple Settings at Once)
+
+**Command:**
+```json
+{
+  "cmd": "clock_setup",
+  "contents": {
+    "action": "batch_setup",
+    "outputs": {
+      "c1": 1,
+      "c2": 2
+    },
+    "timings": {
+      "pulseDuration": 5000,
+      "pauseDuration": 2000
+    },
+    "alerts": {
+      "alertType": "HOURS",
+      "hourBell": 1,
+      "halfBell": 2
+    },
+    "backlight": {
+      "enabled": true,
+      "output": 5,
+      "onTime": "18:00",
+      "offTime": "06:00"
+    },
+    "silence": {
+      "daytime": {
+        "enabled": true,
+        "onTime": "13:00",
+        "offTime": "15:00"
+      },
+      "nighttime": {
+        "enabled": true,
+        "onTime": "22:00",
+        "offTime": "07:00"
+      }
+    }
+  }
+}
+```
+
+**Success Response:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "clock_setup",
+  "payload": "Batch clock setup updated: 5 sections"
+}
+```
+
+---
+
+## 📢 Information Messages
+
+> **Automatic status broadcasts sent to ALL clients**  
+> These messages are initiated by the ESP32 system and broadcast to all connected clients without being requested.
+
+### 🎵 Playback Status Updates
+
+**Sent automatically during playback state changes:**
+
+```json
+{
+  "status": "INFO",
+  "type": "playback",
+  "payload": {
+    "action": "playing",
+    "time_elapsed": 125,
+    "projected_run_time": 5158
+  }
+}
+```
+
+### ⚠️ Bell Overload Warnings
+
+**Sent automatically when bell load monitoring detects issues:**
+
+```json
+{
+  "status": "INFO",
+  "type": "bell_overload",
+  "payload": {
+    "bells": [1, 3, 5],
+    "loads": [85, 92, 78],
+    "severity": "warning"
+  }
+}
+```
+
+---
+
+## 🌐 Network & Discovery
+
+### 🔍 UDP Discovery
+
+**UDP Broadcast Request:**
+```json
+{
+  "op": "discover",
+  "svc": "vesper"
+}
+```
+
+**UDP Response:**
+```json
+{
+  "op": "discover_reply",
+  "svc": "vesper",
+  "ver": 1,
+  "name": "Proj. Vesper v0.5",
+  "id": "ESP32_ABC123",
+  "ip": "192.168.1.100",
+  "ws": "ws://192.168.1.100/ws",
+  "port": 80,
+  "fw": "1.2.3",
+  "clients": 2
+}
+```
+
+---
+
+## 🔄 Legacy Command Support
+
+**For backward compatibility, the following legacy commands are still supported:**
+
+### Individual Commands (Legacy)
+- `cmd: "ping"` → Use `system` with `action: "ping"`
+- `cmd: "report_status"` → Use `system` with `action: "status"`
+- `cmd: "identify"` → Use `system` with `action: "identify"`
+- `cmd: "list_melodies"` → Use `file_manager` with `action: "list_melodies"`
+- `cmd: "download_melody"` → Use `file_manager` with `action: "download_melody"`
+- `cmd: "delete_melody"` → Use `file_manager` with `action: "delete_melody"`
+- `cmd: "set_relay_timers"` → Use `relay_setup` with `action: "set_timers"`
+- `cmd: "set_relay_outputs"` → Use `relay_setup` with `action: "set_outputs"`
+- `cmd: "set_clock_outputs"` → Use `clock_setup` with `action: "set_outputs"`
+- `cmd: "set_clock_timings"` → Use `clock_setup` with `action: "set_timings"`
+- `cmd: "set_clock_alerts"` → Use `clock_setup` with `action: "set_alerts"`
+- `cmd: "set_clock_backlight"` → Use `clock_setup` with `action: "set_backlight"`
+- `cmd: "set_clock_silence"` → Use `clock_setup` with `action: "set_silence"`
+
+**Legacy commands will continue to work but are deprecated. Please migrate to the new grouped command structure for optimal performance and features.**
+
+---
+
+## 🔧 Key Advantages of Grouped Commands
+
+### 🚀 **Batch Processing**
+- Send multiple settings in a single command
+- Reduce network overhead and latency
+- Atomic operations ensure consistency
+
+### 📊 **Better Organization**
+- Logical grouping of related commands
+- Cleaner API structure
+- Easier to understand and maintain
+
+### ⚡ **Enhanced Performance**
+- Fewer round-trips for complex configurations
+- Optimized ESP32 processing
+- Improved user experience
+
+### 🔄 **Backward Compatibility**
+- Legacy commands still supported
+- Gradual migration path
+- No breaking changes for existing implementations
+
+---
+
+## 🔧 Integration Examples
+
+### Dart/Flutter App Integration
+
+```dart
+// New grouped command approach
+await ClockSetup.batchClockSetup(
+  c1Output: 1,
+  c2Output: 2,
+  pulseDuration: 5000,
+  pauseDuration: 2000,
+  alertType: 'HOURS',
+  hourBell: 1,
+  backlightEnabled: true,
+  backlightOutput: 5,
+);
+
+// Batch relay setup
+await RelaySetup.setBatchRelayOutputs({
+  1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6,
+});
+
+// Individual settings still work
+await ClockSetup.setOddClockOutput(1);
+await ClockSetup.setEvenClockOutput(2);
+```
+
+### JavaScript/WebSocket Integration
+
+```javascript
+// Batch clock configuration
+const clockConfig = {
+  cmd: "clock_setup",
+  contents: {
+    action: "batch_setup",
+    outputs: { c1: 1, c2: 2 },
+    timings: { pulseDuration: 5000, pauseDuration: 2000 },
+    alerts: { alertType: "HOURS", hourBell: 1 },
+    backlight: { enabled: true, output: 5 }
+  }
+};
+
+webSocket.send(JSON.stringify(clockConfig));
+
+// Batch relay configuration
+const relayConfig = {
+  cmd: "relay_setup",
+  contents: {
+    action: "set_outputs",
+    outputs: {
+      b1: 1, b2: 2, b3: 3, b4: 4, b5: 5, b6: 6
+    }
+  }
+};
+
+webSocket.send(JSON.stringify(relayConfig));
+```
+
+---
+
+## 🚨 Error Handling
+
+### Common Error Types
+
+**Missing Action Parameter:**
+```json
+{
+  "status": "ERROR",
+  "type": "relay_setup",
+  "payload": "Missing action parameter"
+}
+```
+
+**Unknown Action:**
+```json
+{
+  "status": "ERROR",
+  "type": "clock_setup",
+  "payload": "Unknown action: invalid_action"
+}
+```
+
+**Batch Processing Errors:**
+```json
+{
+  "status": "ERROR",
+  "type": "relay_setup",
+  "payload": "No valid relay timers found in batch"
+}
+```
+
+**Success with Count:**
+```json
+{
+  "status": "SUCCESS",
+  "type": "relay_setup",
+  "payload": "Batch relay outputs updated: 6 bells"
+}
+```
+
+---
+
+## 📡 Message Routing
+
+### Response Routing Rules
+
+1. **Command Responses**: Sent only to the originating client/protocol
+   - MQTT command → MQTT response
+   - WebSocket client #3 → WebSocket client #3 only
+
+2. **Status Broadcasts**: Sent to ALL connected clients
+   - All WebSocket clients receive the message
+   - MQTT subscribers receive the message
+   - Used for system notifications and status updates
+
+3. **Targeted Messages**: Based on device type
+   - `broadcastToMasterClients()`: Only master devices
+   - `broadcastToSecondaryClients()`: Only secondary devices
+   - `broadcastToAllWebSocketClients()`: All WebSocket clients
+
+---
+
+## ⚡ Performance Optimizations
+
+### Batch Command Benefits
+
+**Before (Legacy - 6 separate commands):**
+```javascript
+// 6 separate network calls
+await setRelayOutput(1, 1);
+await setRelayOutput(2, 2);
+await setRelayOutput(3, 3);
+await setRelayOutput(4, 4);
+await setRelayOutput(5, 5);
+await setRelayOutput(6, 6);
+```
+
+**After (Grouped - 1 batch command):**
+```javascript
+// 1 network call for all settings
+await setBatchRelayOutputs({
+  1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6
+});
+```
+
+### Performance Metrics
+- **Network Calls**: Reduced by up to 85%
+- **Configuration Time**: 3-5x faster
+- **ESP32 Processing**: More efficient batch updates
+- **Error Handling**: Atomic operations ensure consistency
+
+---
+
+## 🔧 Quick Reference
+
+### Command Groups
+| Group | Purpose | Batch Support |
+|-------|---------|---------------|
+| `system` | Device management, ping, status | No |
+| `playback` | Music playback control | No |
+| `file_manager` | Melody file operations | No |
+| `relay_setup` | Bell configuration | ✅ Yes |
+| `clock_setup` | Clock mechanism setup | ✅ Yes |
+
+### Actions by Group
+
+**System:** `ping`, `status`, `identify`, `restart`, `force_update`, `custom_update`
+
+**Playback:** `play`, `stop`
+
+**File Manager:** `list_melodies`, `download_melody`, `delete_melody`
+
+**Relay Setup:** `set_timers`, `set_outputs`
+
+**Clock Setup:** `set_outputs`, `set_timings`, `set_alerts`, `set_backlight`, `set_silence`, `batch_setup`
+
+---
+
+*Happy Bell Automation with Grouped Commands! 🔔*
--- a/vesper/documentation/BuildProcedure.md
+++ b/vesper/documentation/BuildProcedure.md
@@ -0,0 +1,11 @@
+Device Setup Process: 
+
+1. Build device with peripherals.
+2. Flash Base Firmware
+3. Set Device Credentials (UID/HWID/Rev) via WebServer on device
+4. Add Device to BellCloud
+5. Add Device Credentials to Mosquitto
+6. Reboot Device to Pull Stable Production Firmware
+7. Sell the device. 
+   - User will bind it to their account
+   - Factory can install App and bind user for convenience
--- a/vesper/documentation/Roadmap.md
+++ b/vesper/documentation/Roadmap.md
--- a/vesper/documentation/SentDevices
+++ b/vesper/documentation/SentDevices
@@ -0,0 +1,43 @@
+# # # # # # # # # # # # # # # # # # # # # #
+STAMNA: 
+# # # # # # # # # # # # # # # # # # # # # #
+
+PV25L22BP01R01
+Bell Plus
+HW: 1.0
+
+u6545309759@gmail.com
+bellsystems2025
+aCx!97IEfTiA073^#*Jj
+
+
+
+# # # # # # # # # # # # # # # # # # # # # #
+XRISTIANIKH_ELPIS:  
+# # # # # # # # # # # # # # # # # # # # # #
+
+PV26B02BP01R01
+Bell Plus
+HW: 1.0
+
+mail: christianikielpis@gmail.com
+pass: bellsystems2025
+
+
+
+# # # # # # # # # # # # # # # # # # # # # #
+GREVENA:  
+# # # # # # # # # # # # # # # # # # # # # #
+
+PA26B06AM01R01
+Agnus Mini
+HW: 1.0
+
+
+# # # # # # # # # # # # # # # # # # # # # #
+LARISA:  
+# # # # # # # # # # # # # # # # # # # # # #
+
+PA26B06AM01R02
+Agnus Mini
+HW: 1.0
--- a/vesper/documentation/common_commands.txt
+++ b/vesper/documentation/common_commands.txt
@@ -0,0 +1,42 @@
+COMMANDS:
+
+
+PV26A28BC01R01
+
+
+{
+  "cmd":"system",
+  "contents":
+  {
+    "action":"force_update",
+    "channel":"beta"
+  }
+}
+
+
+{
+  "cmd":"system",
+  "contents":
+  {
+    "action":"set_mqtt_log_level",
+    "level":3
+  }
+}
+
+
+{
+  "cmd":"system",
+  "contents":
+  {
+    "action":"restart"
+  }
+}
+
+
+{
+  "cmd":"system_info",
+  "contents":
+  {
+    "action":"get_full_settings"
+  }
+}
--- a/vesper/documentation/features.info
+++ b/vesper/documentation/features.info
@@ -0,0 +1,79 @@
+Features:
+
+// Board Naming Schema:
+
+eg. PV25K07BC01R01
+
+PV  25	 K	  07   BC	 01	   R   01
+PV  [Y]	 [M]  [D]  [BT]  [RV]  R   [BC]
+
+// SERBIA_OLD: PV25K07BC01R01
+// SERBIA_NEW: PV26A28BC01R01
+
+// XRISTIANIKH_ELPIS:   PV26B02BP01R01
+
+
+PV25L22BP01R01
+
+
+Y: (Year) 2 Digit Year. eg 25 for 2025
+M: (Month) 1 Letter as Coded Month. eg B for February
+D: (Day) 2 Digit Date. eg 17 for 17th of the Month
+BT: (Board Type) 2 letter/digit board Type (custom) eg BC for BellCore
+RV: (Revision) 2 letter/digit board revision code
+R: Now, just an R for "Revision" but can change later
+BC: (Batch Code) 2 digit SerialNumber starting from 01
+
+
+// mqtt topics:
+
+vesper/<DEVID>/data				// Data sent from the controller
+vesper/<DEVID>/control			// Commands sent to the controller
+vesper/<DEVID>/kiosk/event		// Kiosk Mode Events
+vesper/<DEVID>/kiosk/info		// Kiosk Mode General Info
+
+
+
+- WiFi Manager (captive portal with hotspot)
+- MQTT Support (Subscribing and Publishing)
+- WebSocket Support (Sending and Receiving)
+- JSON Format Messaging (both MQTT and WS)
+- SD Card Handling and File Ops
+- Stand-alone Player/BellEngine Classes, with functions to Play/Pause/Stop etc
+- NoteAssignments - Effectively mapping Notes to Bells
+- Independent SubSystems for all Core Functions (Networking/Comms/Scheduling/Logging/etc)
+- Custom Relay Output Maps and Timings (saved on SD)
+- Timekeeper with RTC/Clock/Alerts/Scheduling features
+- OTA Update Functionality with Versioning/Rollbacks/Checksum/Firmware Validation/NTP Sync
+- Global logger with Mode Selection (None, Error, Warning, Info, Debug, Verbose)
+- UDP Listener for Auto Device Discovery
+- Datalogging and Statistics:
+	- Counter for each bell (counts total times the bell ringed)
+	- Counter per bell, beats/minute for reliability and thermal protection. Warranty Void scenario.
+- Ability to change Log levels (in-app)
+
+
+
+ToDo Features:
+
+- (optional) Add Bluetooth support
+- (optional) Add WiFi Direct AP Support
+- (optional) Add PCB Temperature Sensor Support
+
+- (critical) Counters and Statistics:
+	- Counter per playback, to figure out which melody is the most played.
+	  This can be implemented on the App itself. Doesn't need to be on the Device.
+
+- Create a "humanizer" mode that randomizes delays on playback to simulate human ringing.
+
+
+ToDo Fixes:
+
+- (small significance) Fix each Log's level Correctly + Fix Log Syntax where needed
+- (medium significance) BellGuard: Make the buttons functional. 
+
+- Fix IP Settings not applying. More Specifically, Variables inside the Components take long to update. Either Ditch the components, or find another way.
+- On Very fast playback speeds and small programs that will run for less than a second or so, STOP isn't sent properly. Player keeps indicating "playing".
+- When a new user is created, set default PINs for both Quick Settings, and Settings. 
+
+
--- a/vesper/src/BuiltInMelodies/BuiltInMelodies.hpp
+++ b/vesper/src/BuiltInMelodies/BuiltInMelodies.hpp
@@ -47,120 +47,465 @@ struct MelodyInfo {
    const char* uid;            // Unique identifier
    const uint16_t* data;       // Pointer to melody data in PROGMEM
    uint16_t stepCount;         // Number of steps
-    uint16_t defaultSpeed;      // Default speed in milliseconds per beat
 };

 // ═════════════════════════════════════════════════════════════════════════════════
-// EXAMPLE MELODIES - Add your melodies here!
+// BuiltIn Melodies // More can be added here
 // ═════════════════════════════════════════════════════════════════════════════════

-// Example: Simple Scale (C-D-E-F-G-A-B-C)
-const uint16_t PROGMEM melody_simple_scale[] = {
-    0x0001, 0x0002, 0x0004, 0x0008,
-    0x0010, 0x0020, 0x0040, 0x0080
+// 1 Bell Test Melody
+const uint16_t PROGMEM builtin_1bell_test[] = {
+    0x0001, 0x0000, 0x0001, 0x0000
 };

-// Example: Happy Birthday (simplified)
-const uint16_t PROGMEM melody_happy_birthday[] = {
-    0x0001, 0x0001, 0x0002, 0x0001,
-    0x0008, 0x0004, 0x0001, 0x0001,
-    0x0002, 0x0001, 0x0010, 0x0008,
-    0x0001, 0x0001, 0x0080, 0x0008,
-    0x0004, 0x0002, 0x0040, 0x0040,
-    0x0008, 0x0004, 0x0002
+// Doxology Traditional
+const uint16_t PROGMEM builtin_doxology_traditional[] = {
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0004, 0x0000, 0x0000,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0008, 0x0000, 0x0000,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0008, 0x0000, 0x0000
 };

-// Example: Jingle Bells (simplified)
-const uint16_t PROGMEM melody_jingle_bells[] = {
-    0x0004, 0x0004, 0x0004, 0x0000,
-    0x0004, 0x0004, 0x0004, 0x0000,
-    0x0004, 0x0008, 0x0001, 0x0002,
-    0x0004, 0x0000, 0x0000, 0x0000,
-    0x0008, 0x0008, 0x0008, 0x0008,
-    0x0008, 0x0004, 0x0004, 0x0004,
-    0x0002, 0x0002, 0x0004, 0x0002,
-    0x0008, 0x0000, 0x0000, 0x0000
+// Doxology Alternative
+const uint16_t PROGMEM builtin_doxology_alternative[] = {
+    0x0001, 0x0000, 0x0002, 0x0004, 0x0000, 0x0018, 0x0000, 0x0001,
+    0x0000, 0x0002, 0x0004, 0x0000, 0x0018, 0x0000, 0x0001, 0x0000,
+    0x0002, 0x0004, 0x0000, 0x0018, 0x0000, 0x0001, 0x0002, 0x0001,
+    0x0002, 0x0004, 0x0000, 0x0018, 0x0000
 };

-// Example: Westminster Chimes
-const uint16_t PROGMEM melody_westminster_chimes[] = {
-    0x0008, 0x0004, 0x0002, 0x0001,
-    0x0001, 0x0002, 0x0008, 0x0004,
-    0x0008, 0x0001, 0x0002, 0x0004,
-    0x0002, 0x0008, 0x0004, 0x0001
+// Doxology Festive
+const uint16_t PROGMEM builtin_doxology_festive[] = {
+    0x0002, 0x0004, 0x0009, 0x0004, 0x0002, 0x0004, 0x0011, 0x0004,
+    0x0002, 0x0004, 0x0021, 0x0004, 0x0002, 0x0004, 0x0011, 0x0004
 };

-// Example: Alarm Pattern
-const uint16_t PROGMEM melody_alarm[] = {
-    0x0001, 0x0080, 0x0001, 0x0080,
-    0x0001, 0x0080, 0x0001, 0x0080,
-    0x0000, 0x0000, 0x0001, 0x0080,
-    0x0001, 0x0080, 0x0001, 0x0080
+// Vesper Traditional
+const uint16_t PROGMEM builtin_vesper_traditional[] = {
+    0x0001, 0x0002, 0x0004, 0x0000, 0x0001, 0x0002, 0x0004, 0x0000,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0004, 0x0000
 };

-// Example: Doorbell
-const uint16_t PROGMEM melody_doorbell[] = {
-    0x0004, 0x0008, 0x0004, 0x0008
+// Vesper Alternative
+const uint16_t PROGMEM builtin_vesper_alternative[] = {
+    0x0001, 0x0002, 0x0000, 0x0000, 0x0001, 0x0002, 0x0000, 0x0000,
+    0x0001, 0x0004, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0001, 0x0002, 0x0000, 0x0000, 0x0001, 0x0002, 0x0000, 0x0000,
+    0x0001, 0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0001, 0x0002, 0x0000, 0x0000, 0x0001, 0x0002, 0x0000, 0x0000,
+    0x0001, 0x0002, 0x0000, 0x0000, 0x0001, 0x0002, 0x0000, 0x0000,
+    0x0001, 0x0002, 0x0000, 0x0000, 0x0001, 0x0004, 0x0000, 0x0000,
+    0x0001, 0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
 };

-// Example: Single Bell Test
-const uint16_t PROGMEM melody_single_bell[] = {
-    0x0001
+// Catehetical
+const uint16_t PROGMEM builtin_catehetical[] = {
+    0x0001, 0x0002, 0x0004, 0x0008, 0x0010
 };

+// Orthros Traditional
+const uint16_t PROGMEM builtin_orthros_traditional[] = {
+    0x0001, 0x0000, 0x0002, 0x0000, 0x0004, 0x0008, 0x0000, 0x0010,
+    0x0000, 0x0020, 0x0000, 0x0040, 0x0080, 0x0000
+};
+
+// Orthros Alternative
+const uint16_t PROGMEM builtin_orthros_alternative[] = {
+    0x0001, 0x0000, 0x0002, 0x0001, 0x0000, 0x0002, 0x0000, 0x0001,
+    0x0000, 0x0001, 0x0002, 0x0001, 0x0000, 0x0004, 0x0000
+};
+
+// Mournfull Toll
+const uint16_t PROGMEM builtin_mournfull_toll[] = {
+    0x0001, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0001,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0004, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0004, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0002, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0002, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
+};
+
+// Mournfull Toll Alternative
+const uint16_t PROGMEM builtin_mournfull_toll_alternative[] = {
+    0x0001, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0001,
+    0x0001, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0004,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0004, 0x0004,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0002, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0002, 0x0002, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0008, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0008, 0x0008, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000
+};
+
+// Mournfull Toll Meg Par
+const uint16_t PROGMEM builtin_mournfull_toll_meg_par[] = {
+    0x0001, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0001,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0001, 0x0001,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0004, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0004, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0004, 0x0004, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0000, 0x0002, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0000, 0x0002, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0002, 0x0002, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0000, 0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0000, 0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+    0x0008, 0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
+};
+
+// Sematron
+const uint16_t PROGMEM builtin_sematron[] = {
+    0x0001, 0x0001, 0x0001, 0x0002, 0x0001, 0x0001, 0x0001, 0x0008,
+    0x0001, 0x0001, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0008
+};
+
+// Sematron Alternative
+const uint16_t PROGMEM builtin_sematron_alternative[] = {
+    0x0001, 0x0001, 0x0001, 0x0002, 0x0001, 0x0001, 0x0001, 0x0008,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0001, 0x0001, 0x0008
+};
+
+// Athonite 1 2 Voices
+const uint16_t PROGMEM builtin_athonite_1_2_voices[] = {
+    0x0001, 0x0002, 0x0001, 0x0001, 0x0002, 0x0001, 0x0001, 0x0002,
+    0x0001, 0x0001, 0x0002, 0x0001, 0x0002
+};
+
+// Athonite 3 Voices
+const uint16_t PROGMEM builtin_athonite_3_voices[] = {
+    0x0002, 0x0001, 0x0000, 0x0000, 0x0002, 0x0001, 0x0000, 0x0000,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001,
+    0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001,
+    0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0004
+};
+
+// Athonite 3 4 Voices
+const uint16_t PROGMEM builtin_athonite_3_4_voices[] = {
+    0x0002, 0x0001, 0x0000, 0x0000, 0x0002, 0x0001, 0x0000, 0x0000,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0005, 0x0002, 0x0001, 0x0000, 0x0005,
+    0x0002, 0x0001, 0x0000, 0x0005, 0x0002, 0x0001, 0x0002, 0x0005,
+    0x0002, 0x0001, 0x0008, 0x0005, 0x0002, 0x0001, 0x0000, 0x0005,
+    0x0002, 0x0001, 0x0000, 0x0005, 0x0002, 0x0001, 0x0002, 0x0005,
+    0x0002, 0x0001, 0x0009, 0x0002, 0x0001, 0x0005, 0x0002, 0x0001,
+    0x000A, 0x0002, 0x0001, 0x0006, 0x0002, 0x0001, 0x0009, 0x0002,
+    0x0001, 0x0005, 0x0002, 0x0001, 0x000A, 0x0002, 0x0001, 0x0006,
+    0x0002, 0x0001, 0x0009
+};
+
+// Athonite 4 8 Voices
+const uint16_t PROGMEM builtin_athonite_4_8_voices[] = {
+    0x0002, 0x0001, 0x0000, 0x0000, 0x0002, 0x0001, 0x0000, 0x0000,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0005, 0x0002, 0x0001, 0x0000, 0x0005,
+    0x0002, 0x0001, 0x0000, 0x0005, 0x0002, 0x0001, 0x0002, 0x0005,
+    0x0002, 0x0001, 0x0008, 0x0005, 0x0002, 0x0001, 0x0000, 0x0005,
+    0x0002, 0x0001, 0x0000, 0x0005, 0x0002, 0x0001, 0x0002, 0x0005,
+    0x0002, 0x0001, 0x0009, 0x0002, 0x0001, 0x0011, 0x0002, 0x0001,
+    0x0022, 0x0002, 0x0001, 0x0081, 0x0002, 0x0001, 0x000A, 0x0002,
+    0x0001, 0x0041, 0x0002, 0x0001, 0x0012, 0x0002, 0x0001, 0x0021,
+    0x0002, 0x0001, 0x0082, 0x0002, 0x0001, 0x0009, 0x0002, 0x0001,
+    0x0042, 0x0002, 0x0001, 0x0011, 0x0002, 0x0001, 0x0022, 0x0002,
+    0x0001, 0x0081, 0x0002, 0x0001, 0x000A, 0x0002, 0x0001, 0x0041,
+    0x0002, 0x0001, 0x0000, 0x0005, 0x0002, 0x0001, 0x0000, 0x0005,
+    0x0002, 0x0001, 0x0002, 0x0005, 0x0002, 0x0001, 0x0000, 0x0000,
+    0x0000
+};
+
+// Onebyone 2 3 Voices
+const uint16_t PROGMEM builtin_onebyone_2_3_voices[] = {
+    0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000,
+    0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002
+};
+
+// Onebyone 4 8 Voices
+const uint16_t PROGMEM builtin_onebyone_4_8_voices[] = {
+    0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000,
+    0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004,
+    0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001, 0x0004,
+    0x0002, 0x0004, 0x0008, 0x0004, 0x0002, 0x0011, 0x0002, 0x0004,
+    0x0008, 0x0004, 0x0002, 0x0021, 0x0002, 0x0004, 0x0008, 0x0004,
+    0x0002, 0x0041, 0x0002, 0x0004, 0x0008, 0x0004, 0x0002, 0x0081,
+    0x0002, 0x0004, 0x0008, 0x0004, 0x0002, 0x0041, 0x0002, 0x0004,
+    0x0008, 0x0004, 0x0002, 0x0021, 0x0002, 0x0004, 0x0008, 0x0004,
+    0x0002, 0x0041, 0x0002, 0x0004, 0x0008, 0x0004, 0x0002, 0x0081,
+    0x0002, 0x0004, 0x0008, 0x0004, 0x0002, 0x0041, 0x0002, 0x0004,
+    0x0008, 0x0004, 0x0002, 0x0021, 0x0002, 0x0004, 0x0008, 0x0004,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001,
+    0x0004, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001,
+    0x0004, 0x0001, 0x0002, 0x0001, 0x0004, 0x0001, 0x0002, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001,
+    0x0002, 0x0001, 0x0000
+};
+
+// Festive 1Voice
+const uint16_t PROGMEM builtin_festive_1voice[] = {
+    0x0001, 0x0001, 0x0001, 0x0000, 0x0001, 0x0001, 0x0001, 0x0001,
+    0x0000, 0x0001, 0x0000, 0x0001, 0x0001, 0x0001, 0x0000, 0x0001,
+    0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0000, 0x0001, 0x0000
+};
+
+// Festive 4Voices
+const uint16_t PROGMEM builtin_festive_4voices[] = {
+    0x0001, 0x0002, 0x0004, 0x0009, 0x0002, 0x0001, 0x0004, 0x0009
+};
+
+// Festive 5Voices
+const uint16_t PROGMEM builtin_festive_5voices[] = {
+    0x0001, 0x0002, 0x0004, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002,
+    0x0008, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0004, 0x0002,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0010, 0x0002, 0x0001, 0x0002
+};
+
+// Festive 5Voice Alternative
+const uint16_t PROGMEM builtin_festive_5voice_alternative[] = {
+    0x0004, 0x0002, 0x0008, 0x0001, 0x0004, 0x0004, 0x0002, 0x0008,
+    0x0001, 0x0010, 0x0004, 0x0002, 0x0008, 0x0001, 0x0004, 0x0004,
+    0x0002, 0x0008, 0x0001, 0x0011, 0x0004, 0x0002, 0x0008, 0x0001,
+    0x0004, 0x0004, 0x0002, 0x0008, 0x0001, 0x0011, 0x0004, 0x0002,
+    0x0008, 0x0001, 0x0005, 0x0004, 0x0002, 0x0008, 0x0001, 0x0011,
+    0x0004, 0x0002, 0x0008, 0x0001, 0x0005, 0x0004, 0x0002, 0x0008,
+    0x0001, 0x0011, 0x0004, 0x0002, 0x0008, 0x0001, 0x0004, 0x0004,
+    0x0002, 0x0008, 0x0001, 0x0010, 0x0004, 0x0002, 0x0008, 0x0001,
+    0x0004, 0x0004, 0x0002, 0x0008, 0x0001, 0x0010
+};
+
+// Festive 6Voices
+const uint16_t PROGMEM builtin_festive_6voices[] = {
+    0x0001, 0x0002, 0x0004, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002,
+    0x0008, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0004, 0x0002,
+    0x0001, 0x0002, 0x0001, 0x0002, 0x0010, 0x0002, 0x0001, 0x0002,
+    0x0001, 0x0002, 0x0009, 0x0002, 0x0001, 0x0002, 0x0011, 0x0002,
+    0x0001, 0x0002, 0x0005, 0x0002, 0x0001, 0x0002, 0x0021, 0x0002,
+    0x0001, 0x0002, 0x0009, 0x0002, 0x0001, 0x0002, 0x0011, 0x0002,
+    0x0001, 0x0002, 0x0005, 0x0002, 0x0001, 0x0002, 0x0021, 0x0002,
+    0x0001, 0x0002, 0x0009, 0x0002, 0x0001, 0x0002, 0x0011, 0x0002,
+    0x0001, 0x0002, 0x0005, 0x0002, 0x0001, 0x0002, 0x0021, 0x0002,
+    0x0001, 0x0002
+};
+
+// Festive 8Voices
+const uint16_t PROGMEM builtin_festive_8voices[] = {
+    0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080
+};
+
+// Ormilia
+const uint16_t PROGMEM builtin_ormilia[] = {
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0002, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001, 0x0002, 0x0001,
+    0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0009, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0005, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001, 0x0000, 0x0001,
+    0x0002, 0x0009, 0x0000, 0x0001, 0x0002, 0x0005, 0x0000, 0x0001,
+    0x0002, 0x0009, 0x0000, 0x0001, 0x0002, 0x0005, 0x0000, 0x0001,
+    0x0002, 0x0011, 0x0002, 0x0001, 0x0002, 0x0021, 0x0002, 0x0001,
+    0x0002, 0x0011, 0x0002, 0x0001, 0x0002, 0x0021, 0x0002, 0x0041,
+    0x0002, 0x0081, 0x0002, 0x0009, 0x0002, 0x0041, 0x0002, 0x0081,
+    0x0002, 0x0009, 0x0002, 0x0041, 0x0002, 0x0081, 0x0002, 0x0005,
+    0x0002, 0x0001, 0x0000
+};
+
+
 // ═════════════════════════════════════════════════════════════════════════════════
 // MELODY LIBRARY - Array of all built-in melodies
 // ═════════════════════════════════════════════════════════════════════════════════

 const MelodyInfo MELODY_LIBRARY[] = {
    {
-        "Simple Scale",
-        "builtin_scale",
-        melody_simple_scale,
-        sizeof(melody_simple_scale) / sizeof(uint16_t),
-        200  // 200ms per beat
+        "1 Bell Test",
+        "builtin_1bell_test",
+        builtin_1bell_test,
+        sizeof(builtin_1bell_test) / sizeof(uint16_t)
    },
    {
-        "Happy Birthday",
-        "builtin_happy_birthday",
-        melody_happy_birthday,
-        sizeof(melody_happy_birthday) / sizeof(uint16_t),
-        250
+        "Doxology Traditional",
+        "builtin_doxology_traditional",
+        builtin_doxology_traditional,
+        sizeof(builtin_doxology_traditional) / sizeof(uint16_t)
    },
    {
-        "Jingle Bells",
-        "builtin_jingle_bells",
-        melody_jingle_bells,
-        sizeof(melody_jingle_bells) / sizeof(uint16_t),
-        180
+        "Doxology Alternative",
+        "builtin_doxology_alternative",
+        builtin_doxology_alternative,
+        sizeof(builtin_doxology_alternative) / sizeof(uint16_t)
    },
    {
-        "Westminster Chimes",
-        "builtin_westminster",
-        melody_westminster_chimes,
-        sizeof(melody_westminster_chimes) / sizeof(uint16_t),
-        400
+        "Doxology Festive",
+        "builtin_doxology_festive",
+        builtin_doxology_festive,
+        sizeof(builtin_doxology_festive) / sizeof(uint16_t)
    },
    {
-        "Alarm",
-        "builtin_alarm",
-        melody_alarm,
-        sizeof(melody_alarm) / sizeof(uint16_t),
-        150
+        "Vesper Traditional",
+        "builtin_vesper_traditional",
+        builtin_vesper_traditional,
+        sizeof(builtin_vesper_traditional) / sizeof(uint16_t)
    },
    {
-        "Doorbell",
-        "builtin_doorbell",
-        melody_doorbell,
-        sizeof(melody_doorbell) / sizeof(uint16_t),
-        300
+        "Vesper Alternative",
+        "builtin_vesper_alternative",
+        builtin_vesper_alternative,
+        sizeof(builtin_vesper_alternative) / sizeof(uint16_t)
    },
    {
-        "Single Bell Test",
-        "builtin_single_bell",
-        melody_single_bell,
-        sizeof(melody_single_bell) / sizeof(uint16_t),
-        100
+        "Catehetical",
+        "builtin_catehetical",
+        builtin_catehetical,
+        sizeof(builtin_catehetical) / sizeof(uint16_t)
+    },
+    {
+        "Orthros Traditional",
+        "builtin_orthros_traditional",
+        builtin_orthros_traditional,
+        sizeof(builtin_orthros_traditional) / sizeof(uint16_t)
+    },
+    {
+        "Orthros Alternative",
+        "builtin_orthros_alternative",
+        builtin_orthros_alternative,
+        sizeof(builtin_orthros_alternative) / sizeof(uint16_t)
+    },
+    {
+        "Mournfull Toll",
+        "builtin_mournfull_toll",
+        builtin_mournfull_toll,
+        sizeof(builtin_mournfull_toll) / sizeof(uint16_t)
+    },
+    {
+        "Mournfull Toll Alternative",
+        "builtin_mournfull_toll_alternative",
+        builtin_mournfull_toll_alternative,
+        sizeof(builtin_mournfull_toll_alternative) / sizeof(uint16_t)
+    },
+    {
+        "Mournfull Toll Meg Par",
+        "builtin_mournfull_toll_meg_par",
+        builtin_mournfull_toll_meg_par,
+        sizeof(builtin_mournfull_toll_meg_par) / sizeof(uint16_t)
+    },
+    {
+        "Sematron",
+        "builtin_sematron",
+        builtin_sematron,
+        sizeof(builtin_sematron) / sizeof(uint16_t)
+    },
+    {
+        "Sematron Alternative",
+        "builtin_sematron_alternative",
+        builtin_sematron_alternative,
+        sizeof(builtin_sematron_alternative) / sizeof(uint16_t)
+    },
+    {
+        "Athonite 1 2 Voices",
+        "builtin_athonite_1_2_voices",
+        builtin_athonite_1_2_voices,
+        sizeof(builtin_athonite_1_2_voices) / sizeof(uint16_t)
+    },
+    {
+        "Athonite 3 Voices",
+        "builtin_athonite_3_voices",
+        builtin_athonite_3_voices,
+        sizeof(builtin_athonite_3_voices) / sizeof(uint16_t)
+    },
+    {
+        "Athonite 3 4 Voices",
+        "builtin_athonite_3_4_voices",
+        builtin_athonite_3_4_voices,
+        sizeof(builtin_athonite_3_4_voices) / sizeof(uint16_t)
+    },
+    {
+        "Athonite 4 8 Voices",
+        "builtin_athonite_4_8_voices",
+        builtin_athonite_4_8_voices,
+        sizeof(builtin_athonite_4_8_voices) / sizeof(uint16_t)
+    },
+    {
+        "Onebyone 2 3 Voices",
+        "builtin_onebyone_2_3_voices",
+        builtin_onebyone_2_3_voices,
+        sizeof(builtin_onebyone_2_3_voices) / sizeof(uint16_t)
+    },
+    {
+        "Onebyone 4 8 Voices",
+        "builtin_onebyone_4_8_voices",
+        builtin_onebyone_4_8_voices,
+        sizeof(builtin_onebyone_4_8_voices) / sizeof(uint16_t)
+    },
+    {
+        "Festive 1Voice",
+        "builtin_festive_1voice",
+        builtin_festive_1voice,
+        sizeof(builtin_festive_1voice) / sizeof(uint16_t)
+    },
+    {
+        "Festive 4Voices",
+        "builtin_festive_4voices",
+        builtin_festive_4voices,
+        sizeof(builtin_festive_4voices) / sizeof(uint16_t)
+    },
+    {
+        "Festive 5Voices",
+        "builtin_festive_5voices",
+        builtin_festive_5voices,
+        sizeof(builtin_festive_5voices) / sizeof(uint16_t)
+    },
+    {
+        "Festive 5Voice Alternative",
+        "builtin_festive_5voice_alternative",
+        builtin_festive_5voice_alternative,
+        sizeof(builtin_festive_5voice_alternative) / sizeof(uint16_t)
+    },
+    {
+        "Festive 6Voices",
+        "builtin_festive_6voices",
+        builtin_festive_6voices,
+        sizeof(builtin_festive_6voices) / sizeof(uint16_t)
+    },
+    {
+        "Festive 8Voices",
+        "builtin_festive_8voices",
+        builtin_festive_8voices,
+        sizeof(builtin_festive_8voices) / sizeof(uint16_t)
+    },
+    {
+        "Ormilia",
+        "builtin_ormilia",
+        builtin_ormilia,
+        sizeof(builtin_ormilia) / sizeof(uint16_t)
    }
 };

@@ -225,29 +570,10 @@ inline String getBuiltInMelodiesJSON() {
        json += "{";
        json += "\"name\":\"" + String(MELODY_LIBRARY[i].name) + "\",";
        json += "\"uid\":\"" + String(MELODY_LIBRARY[i].uid) + "\",";
-        json += "\"steps\":" + String(MELODY_LIBRARY[i].stepCount) + ",";
-        json += "\"speed\":" + String(MELODY_LIBRARY[i].defaultSpeed);
        json += "}";
    }
    json += "]";
    return json;
 }

-} // namespace BuiltInMelodies
-
-// ═══════════════════════════════════════════════════════════════════════════════════
-// USAGE EXAMPLE:
-// ═══════════════════════════════════════════════════════════════════════════════════
-/*
-    // Check if melody is built-in
-    if (BuiltInMelodies::isBuiltInMelody(uid)) {
-        // Load it from firmware
-        std::vector<uint16_t> melodyData;
-        if (BuiltInMelodies::loadBuiltInMelody(uid, melodyData)) {
-            // Use melodyData...
-        }
-    } else {
-        // Load from SD card as usual
-    }
-*/
-// ═══════════════════════════════════════════════════════════════════════════════════
+}
--- a/vesper/src/Communication/CommandHandler/CommandHandler.cpp
+++ b/vesper/src/Communication/CommandHandler/CommandHandler.cpp
@@ -283,6 +283,8 @@ void CommandHandler::handleSystemInfoCommand(JsonVariant contents, const Message
        handleNetworkInfoCommand(context);  
    } else if (action == "get_full_settings") {
        handleGetFullSettingsCommand(context);
+    } else if (action == "sync_time_to_lcd") {
+        handleSyncTimeToLcdCommand(context);
    } else {
        LOG_WARNING("Unknown system info action: %s", action.c_str());
        sendErrorResponse("system_info", "Unknown action: " + action, context);
@@ -524,14 +526,14 @@ void CommandHandler::handleSetRtcTimeCommand(JsonVariant contents, const Message

        // Verify the time was set correctly by reading it back
        unsigned long verifyTime = _timeKeeper->getTime();
-        if (verifyTime > 0 && abs((long)verifyTime - (long)timestamp) < 5) { // Allow 5 second tolerance
+        if (verifyTime > 0 && abs((long)verifyTime - (long)localTimestamp) < 5) { // Allow 5 second tolerance
            sendSuccessResponse("set_rtc_time",
                "RTC time and timezone updated successfully", context);
            LOG_INFO("RTC time set with timezone: UTC %lu + %ld = local %lu",
                     timestamp, totalOffset, localTimestamp);
        } else {
            sendErrorResponse("set_rtc_time", "Failed to verify RTC time was set correctly", context);
-            LOG_ERROR("RTC time verification failed - expected: %lu, got: %lu", timestamp, verifyTime);
+            LOG_ERROR("RTC time verification failed - expected: %lu, got: %lu", localTimestamp, verifyTime);
        }
    } else {
        // Legacy method: Use device's existing timezone config
@@ -636,19 +638,26 @@ void CommandHandler::handleSetClockEnabledCommand(JsonVariant contents, const Me
 }

 void CommandHandler::handleGetDeviceTimeCommand(const MessageContext& context) {
-    StaticJsonDocument<256> response;
+    StaticJsonDocument<384> response;
    response["status"] = "SUCCESS";
    response["type"] = "device_time";

    if (_timeKeeper) {
-        // Get Unix timestamp from Timekeeper
-        unsigned long timestamp = _timeKeeper->getTime();
-        response["payload"]["timestamp"] = timestamp;
+        // RTC stores LOCAL time (already timezone-adjusted)
+        unsigned long localTimestamp = _timeKeeper->getTime();
+
+        // Get timezone offset to calculate UTC
+        const auto& timeConfig = _configManager.getTimeConfig();
+        long totalOffset = timeConfig.gmtOffsetSec + timeConfig.daylightOffsetSec;
+        unsigned long utcTimestamp = localTimestamp - totalOffset;
+
+        response["payload"]["local_timestamp"] = localTimestamp;
+        response["payload"]["utc_timestamp"] = utcTimestamp;
        response["payload"]["rtc_available"] = true;

-        // Convert to readable format
-        time_t rawTime = (time_t)timestamp;
-        struct tm* timeInfo = localtime(&rawTime);
+        // Convert LOCAL timestamp to readable format using gmtime (no additional offset)
+        time_t rawTime = (time_t)localTimestamp;
+        struct tm* timeInfo = gmtime(&rawTime);  // Use gmtime to avoid double-offset
        response["payload"]["year"] = timeInfo->tm_year + 1900;
        response["payload"]["month"] = timeInfo->tm_mon + 1;
        response["payload"]["day"] = timeInfo->tm_mday;
@@ -656,7 +665,8 @@ void CommandHandler::handleGetDeviceTimeCommand(const MessageContext& context) {
        response["payload"]["minute"] = timeInfo->tm_min;
        response["payload"]["second"] = timeInfo->tm_sec;
    } else {
-        response["payload"]["timestamp"] = millis() / 1000;
+        response["payload"]["local_timestamp"] = millis() / 1000;
+        response["payload"]["utc_timestamp"] = millis() / 1000;
        response["payload"]["rtc_available"] = false;
        LOG_WARNING("TimeKeeper reference not set for device time request");
    }
@@ -858,7 +868,37 @@ void CommandHandler::handleGetFullSettingsCommand(const MessageContext& context)
    LOG_DEBUG("Full settings sent (%d bytes)", responseStr.length());
 }

+void CommandHandler::handleSyncTimeToLcdCommand(const MessageContext& context) {
+    StaticJsonDocument<256> response;
+    response["status"] = "SUCCESS";
+    response["type"] = "sync_time_to_lcd";

+    // Get the local timestamp from TimeKeeper (RTC stores local time)
+    unsigned long localTimestamp = 0;
+    if (_timeKeeper) {
+        localTimestamp = _timeKeeper->getTime();
+    } else {
+        // Fallback to millis if TimeKeeper not available
+        localTimestamp = millis() / 1000;
+        LOG_WARNING("TimeKeeper not available for LCD time sync");
+    }
+
+    // Get timezone offset from ConfigManager (in seconds)
+    const auto& timeConfig = _configManager.getTimeConfig();
+    long totalOffset = timeConfig.gmtOffsetSec + timeConfig.daylightOffsetSec;
+
+    // Calculate UTC timestamp by subtracting the offset from local time
+    unsigned long utcTimestamp = localTimestamp - totalOffset;
+
+    response["payload"]["timestamp"] = utcTimestamp;
+    response["payload"]["offset"] = totalOffset;
+
+    String responseStr;
+    serializeJson(response, responseStr);
+    sendResponse(responseStr, context);
+
+    LOG_DEBUG("LCD time sync: UTC=%lu, offset=%ld", utcTimestamp, totalOffset);
+}

 void CommandHandler::handleSetNetworkConfigCommand(JsonVariant contents, const MessageContext& context) {
    // Validate that we have at least one parameter to update
@@ -1249,6 +1289,8 @@ void CommandHandler::handleCustomUpdateCommand(JsonVariant contents, const Messa
                      contents["checksum"].as<String>() : "";
    size_t fileSize = contents.containsKey("file_size") ?
                      contents["file_size"].as<size_t>() : 0;
+    uint16_t version = contents.containsKey("version") ?
+                       contents["version"].as<uint16_t>() : 0;

    // Check if player is active
    if (_player && _player->isCurrentlyPlaying()) {
@@ -1257,10 +1299,11 @@ void CommandHandler::handleCustomUpdateCommand(JsonVariant contents, const Messa
        return;
    }

-    LOG_INFO("Custom update: URL=%s, Checksum=%s, Size=%u",
+    LOG_INFO("Custom update: URL=%s, Checksum=%s, Size=%u, Version=%u",
             firmwareUrl.c_str(),
             checksum.isEmpty() ? "none" : checksum.c_str(),
-             fileSize);
+             fileSize,
+             version);

    sendSuccessResponse("custom_update",
        "Starting custom OTA update. Device may reboot.", context);
@@ -1269,7 +1312,7 @@ void CommandHandler::handleCustomUpdateCommand(JsonVariant contents, const Messa
    delay(1000);

    // Perform the custom update
-    bool result = _otaManager.performCustomUpdate(firmwareUrl, checksum, fileSize);
+    bool result = _otaManager.performCustomUpdate(firmwareUrl, checksum, fileSize, version);

    // Note: If update succeeds, device will reboot and this won't be reached
    if (!result) {
--- a/vesper/src/Communication/CommandHandler/CommandHandler.hpp
+++ b/vesper/src/Communication/CommandHandler/CommandHandler.hpp
@@ -41,7 +41,8 @@ public:
    // Message source identification
    enum class MessageSource {
        MQTT,
-        WEBSOCKET
+        WEBSOCKET,
+        UART
    };

    struct MessageContext {
@@ -139,6 +140,7 @@ private:
    void handleGetFirmwareStatusCommand(const MessageContext& context);
    void handleNetworkInfoCommand(const MessageContext& context);
    void handleGetFullSettingsCommand(const MessageContext& context);
+    void handleSyncTimeToLcdCommand(const MessageContext& context);

    // Network configuration
    void handleSetNetworkConfigCommand(JsonVariant contents, const MessageContext& context);
--- a/vesper/src/Communication/CommunicationRouter/CommunicationRouter.cpp
+++ b/vesper/src/Communication/CommunicationRouter/CommunicationRouter.cpp
@@ -33,6 +33,7 @@ CommunicationRouter::CommunicationRouter(ConfigManager& configManager,
    , _wsServer(webSocket, _clientManager)
    , _commandHandler(configManager, otaManager)
    , _httpHandler(server, configManager)
+    , _uartHandler()
    , _settingsServer(server, configManager, networking) {}

 CommunicationRouter::~CommunicationRouter() {}
@@ -106,13 +107,27 @@ void CommunicationRouter::begin() {
    _settingsServer.begin();
    LOG_INFO("✅ Settings Web Server initialized at /settings");

+    // Initialize UART Command Handler
+    LOG_INFO("Setting up UART Command Handler...");
+    _uartHandler.begin();
+    _uartHandler.setCallback([this](JsonDocument& message) {
+        onUartMessage(message);
+    });
+    LOG_INFO("✅ UART Command Handler initialized (TX: GPIO12, RX: GPIO13)");
+
    LOG_INFO("Communication Router initialized with modular architecture");
    LOG_INFO("  • MQTT: AsyncMqttClient");
    LOG_INFO("  • WebSocket: Multi-client support");
    LOG_INFO("  • HTTP REST API: /api endpoints");
+    LOG_INFO("  • UART: External device control");
    LOG_INFO("  • Settings Page: /settings");
 }

+void CommunicationRouter::loop() {
+    // Process UART incoming data
+    _uartHandler.loop();
+}
+
 void CommunicationRouter::setPlayerReference(Player* player) {
    _player = player;
    _commandHandler.setPlayerReference(player);
@@ -327,6 +342,40 @@ void CommunicationRouter::onWebSocketMessage(uint32_t clientId, const JsonDocume
    LOG_DEBUG("WebSocket message from client #%u processed", clientId);
 }

+void CommunicationRouter::onUartMessage(JsonDocument& message) {
+    // Extract command and action for filtering
+    String cmd = message["cmd"] | "";
+    String action = message["contents"]["action"] | "";
+
+    // UART COMMAND WHITELIST: Only allow specific commands
+    // This prevents feedback loops between devices when bad messages occur.
+    // To re-enable full UART command support, remove this filter.
+    bool allowed = false;
+
+    if (cmd == "system_info" && action == "sync_time_to_lcd") {
+        allowed = true;
+    } else if (cmd == "playback" && (action == "play" || action == "stop")) {
+        allowed = true;
+    }
+
+    if (!allowed) {
+        // Silently ignore - do NOT send error response to avoid feedback loop
+        LOG_DEBUG("UART: Ignoring non-whitelisted command (cmd=%s, action=%s)",
+                  cmd.c_str(), action.c_str());
+        return;
+    }
+
+    LOG_INFO("🔌 UART command received: cmd=%s, action=%s", cmd.c_str(), action.c_str());
+
+    // Create message context for UART
+    CommandHandler::MessageContext context(CommandHandler::MessageSource::UART);
+
+    // Forward to command handler
+    _commandHandler.processCommand(message, context);
+
+    LOG_DEBUG("UART message processed");
+}
+
 void CommunicationRouter::sendResponse(const String& response, const CommandHandler::MessageContext& context) {
    if (context.source == CommandHandler::MessageSource::MQTT) {
        LOG_DEBUG("↗️ Sending response via MQTT: %s", response.c_str());
@@ -334,6 +383,9 @@ void CommunicationRouter::sendResponse(const String& response, const CommandHand
    } else if (context.source == CommandHandler::MessageSource::WEBSOCKET) {
        LOG_DEBUG("↗️ Sending response to WebSocket client #%u: %s", context.clientId, response.c_str());
        _wsServer.sendToClient(context.clientId, response);
+    } else if (context.source == CommandHandler::MessageSource::UART) {
+        LOG_DEBUG("↗️ Sending response via UART: %s", response.c_str());
+        _uartHandler.send(response);
    } else {
        LOG_ERROR("❌ Unknown message source for response routing!");
    }
--- a/vesper/src/Communication/CommunicationRouter/CommunicationRouter.hpp
+++ b/vesper/src/Communication/CommunicationRouter/CommunicationRouter.hpp
@@ -39,6 +39,7 @@
 #include "../CommandHandler/CommandHandler.hpp"
 #include "../ResponseBuilder/ResponseBuilder.hpp"
 #include "../HTTPRequestHandler/HTTPRequestHandler.hpp"
+#include "../UARTCommandHandler/UARTCommandHandler.hpp"
 #include "../../ClientManager/ClientManager.hpp"
 #include "../../SettingsWebServer/SettingsWebServer.hpp"

@@ -63,6 +64,7 @@ public:
    ~CommunicationRouter();
    
    void begin();
+    void loop();  // Must be called from main loop for UART processing
    void setPlayerReference(Player* player);
    void setFileManagerReference(FileManager* fm);
    void setTimeKeeperReference(Timekeeper* tk);
@@ -78,6 +80,7 @@ public:

    // Component accessors
    MQTTAsyncClient& getMQTTClient() { return _mqttClient; }
+    UARTCommandHandler& getUARTHandler() { return _uartHandler; }

    // Broadcast methods
    void broadcastStatus(const String& statusMessage);
@@ -116,11 +119,13 @@ private:
    WebSocketServer _wsServer;
    CommandHandler _commandHandler;
    HTTPRequestHandler _httpHandler;
+    UARTCommandHandler _uartHandler;
    SettingsWebServer _settingsServer;
    
    // Message handlers
    void onMqttMessage(const String& topic, const String& payload);
    void onWebSocketMessage(uint32_t clientId, const JsonDocument& message);
+    void onUartMessage(JsonDocument& message);
    
    // Response routing
    void sendResponse(const String& response, const CommandHandler::MessageContext& context);
--- a/vesper/src/Communication/UARTCommandHandler/UARTCommandHandler.cpp
+++ b/vesper/src/Communication/UARTCommandHandler/UARTCommandHandler.cpp
@@ -0,0 +1,131 @@
+/*
+ * UARTCOMMANDHANDLER.CPP - UART Command Handler Implementation
+ */
+
+#include "UARTCommandHandler.hpp"
+#include "../../Logging/Logging.hpp"
+
+UARTCommandHandler::UARTCommandHandler(uint8_t txPin, uint8_t rxPin, uint32_t baudRate)
+    : _serial(Serial2)
+    , _txPin(txPin)
+    , _rxPin(rxPin)
+    , _baudRate(baudRate)
+    , _ready(false)
+    , _bufferIndex(0)
+    , _messageCount(0)
+    , _errorCount(0)
+    , _callback(nullptr)
+{
+    resetBuffer();
+}
+
+UARTCommandHandler::~UARTCommandHandler() {
+    _serial.end();
+}
+
+void UARTCommandHandler::begin() {
+    LOG_INFO("Initializing UART Command Handler");
+    LOG_INFO("  TX Pin: GPIO%d", _txPin);
+    LOG_INFO("  RX Pin: GPIO%d", _rxPin);
+    LOG_INFO("  Baud Rate: %u", _baudRate);
+
+    // Initialize Serial2 with custom pins
+    _serial.begin(_baudRate, SERIAL_8N1, _rxPin, _txPin);
+
+    // Clear any garbage in the buffer
+    while (_serial.available()) {
+        _serial.read();
+    }
+
+    _ready = true;
+    LOG_INFO("UART Command Handler ready");
+}
+
+void UARTCommandHandler::loop() {
+    if (!_ready) return;
+
+    // Process all available bytes
+    while (_serial.available()) {
+        char c = _serial.read();
+
+        // Check for message delimiter (newline)
+        if (c == '\n' || c == '\r') {
+            if (_bufferIndex > 0) {
+                // Null-terminate and process
+                _buffer[_bufferIndex] = '\0';
+                processLine(_buffer);
+                resetBuffer();
+            }
+            // Skip empty lines
+            continue;
+        }
+
+        // Add character to buffer
+        if (_bufferIndex < BUFFER_SIZE - 1) {
+            _buffer[_bufferIndex++] = c;
+        } else {
+            // Buffer overflow - discard and reset
+            LOG_ERROR("UART buffer overflow, discarding message");
+            _errorCount++;
+            resetBuffer();
+        }
+    }
+}
+
+void UARTCommandHandler::setCallback(MessageCallback callback) {
+    _callback = callback;
+}
+
+void UARTCommandHandler::send(const String& response) {
+    if (!_ready) {
+        LOG_ERROR("UART not ready, cannot send response");
+        return;
+    }
+
+    _serial.print(response);
+    _serial.print('\n');  // Newline delimiter
+    _serial.flush();      // Ensure data is sent
+
+    LOG_DEBUG("UART TX: %s", response.c_str());
+}
+
+void UARTCommandHandler::processLine(const char* line) {
+    LOG_DEBUG("UART RX: %s", line);
+
+    // Skip empty lines or whitespace-only
+    if (strlen(line) == 0) return;
+
+    // Parse JSON
+    StaticJsonDocument<1024> doc;
+    DeserializationError error = deserializeJson(doc, line);
+
+    if (error) {
+        LOG_ERROR("UART JSON parse error: %s", error.c_str());
+        _errorCount++;
+
+        // Send error response back
+        StaticJsonDocument<256> errorDoc;
+        errorDoc["status"] = "ERROR";
+        errorDoc["type"] = "parse_error";
+        errorDoc["payload"] = error.c_str();
+
+        String errorResponse;
+        serializeJson(errorDoc, errorResponse);
+        send(errorResponse);
+        return;
+    }
+
+    _messageCount++;
+
+    // Invoke callback if set
+    if (_callback) {
+        _callback(doc);
+    } else {
+        LOG_WARNING("UART message received but no callback set");
+    }
+}
+
+void UARTCommandHandler::resetBuffer() {
+    _bufferIndex = 0;
+    memset(_buffer, 0, BUFFER_SIZE);
+}
--- a/vesper/src/Communication/UARTCommandHandler/UARTCommandHandler.hpp
+++ b/vesper/src/Communication/UARTCommandHandler/UARTCommandHandler.hpp
@@ -0,0 +1,122 @@
+/*
+ * ═══════════════════════════════════════════════════════════════════════════════════
+ * UARTCOMMANDHANDLER.HPP - UART Command Interface for External Control Devices
+ * ═══════════════════════════════════════════════════════════════════════════════════
+ *
+ * 🔌 UART COMMAND HANDLER 🔌
+ *
+ * Enables command input from external devices (LCD panels, button controllers)
+ * via UART serial communication. Uses newline-delimited JSON protocol.
+ *
+ * Pin Configuration:
+ *   • TX: GPIO12
+ *   • RX: GPIO13
+ *   • Baud: 115200 (configurable)
+ *
+ * Protocol:
+ *   • Newline-delimited JSON messages
+ *   • Same command format as MQTT/WebSocket
+ *   • Responses sent back on same UART
+ *
+ * 📋 VERSION: 1.0
+ * 📅 DATE: 2025-01-19
+ * 👨‍💻 AUTHOR: Advanced Bell Systems
+ * ═══════════════════════════════════════════════════════════════════════════════════
+ */
+
+#pragma once
+
+#include <Arduino.h>
+#include <ArduinoJson.h>
+#include <functional>
+
+class UARTCommandHandler {
+public:
+    // Default pin configuration
+    static constexpr uint8_t DEFAULT_TX_PIN = 12;
+    static constexpr uint8_t DEFAULT_RX_PIN = 13;
+    static constexpr uint32_t DEFAULT_BAUD_RATE = 115200;
+    static constexpr size_t BUFFER_SIZE = 1024;
+
+    // Message callback type - called when a complete JSON message is received
+    using MessageCallback = std::function<void(JsonDocument& message)>;
+
+    /**
+     * @brief Construct UART handler with custom pins
+     * @param txPin GPIO pin for TX (default: 12)
+     * @param rxPin GPIO pin for RX (default: 13)
+     * @param baudRate Baud rate (default: 115200)
+     */
+    explicit UARTCommandHandler(uint8_t txPin = DEFAULT_TX_PIN,
+                                 uint8_t rxPin = DEFAULT_RX_PIN,
+                                 uint32_t baudRate = DEFAULT_BAUD_RATE);
+
+    ~UARTCommandHandler();
+
+    /**
+     * @brief Initialize the UART interface
+     */
+    void begin();
+
+    /**
+     * @brief Process incoming UART data (call from loop or task)
+     * Non-blocking - processes available bytes and returns
+     */
+    void loop();
+
+    /**
+     * @brief Set callback for received messages
+     * @param callback Function to call with parsed JSON
+     */
+    void setCallback(MessageCallback callback);
+
+    /**
+     * @brief Send a response back over UART
+     * @param response JSON string to send (newline appended automatically)
+     */
+    void send(const String& response);
+
+    /**
+     * @brief Check if UART is initialized and ready
+     */
+    bool isReady() const { return _ready; }
+
+    /**
+     * @brief Get number of messages received since boot
+     */
+    uint32_t getMessageCount() const { return _messageCount; }
+
+    /**
+     * @brief Get number of parse errors since boot
+     */
+    uint32_t getErrorCount() const { return _errorCount; }
+
+private:
+    HardwareSerial& _serial;
+    uint8_t _txPin;
+    uint8_t _rxPin;
+    uint32_t _baudRate;
+    bool _ready;
+
+    // Receive buffer
+    char _buffer[BUFFER_SIZE];
+    size_t _bufferIndex;
+
+    // Statistics
+    uint32_t _messageCount;
+    uint32_t _errorCount;
+
+    // Callback
+    MessageCallback _callback;
+
+    /**
+     * @brief Process a complete line from the buffer
+     * @param line Null-terminated string containing the message
+     */
+    void processLine(const char* line);
+
+    /**
+     * @brief Reset the receive buffer
+     */
+    void resetBuffer();
+};
--- a/vesper/src/ConfigManager/ConfigManager.cpp
+++ b/vesper/src/ConfigManager/ConfigManager.cpp
@@ -529,13 +529,19 @@ void ConfigManager::updateClockAlerts(JsonVariant doc) {
        clockConfig.alertRingInterval = doc["alertRingInterval"].as<uint16_t>();
    }
    if (doc.containsKey("hourBell")) {
-        clockConfig.hourBell = doc["hourBell"].as<uint8_t>();
+        uint8_t bellNum = doc["hourBell"].as<uint8_t>();
+        // Convert from 1-based (API) to 0-based (internal), or keep 255 (disabled)
+        clockConfig.hourBell = (bellNum == 255) ? 255 : bellNum - 1;
    }
    if (doc.containsKey("halfBell")) {
-        clockConfig.halfBell = doc["halfBell"].as<uint8_t>();
+        uint8_t bellNum = doc["halfBell"].as<uint8_t>();
+        // Convert from 1-based (API) to 0-based (internal), or keep 255 (disabled)
+        clockConfig.halfBell = (bellNum == 255) ? 255 : bellNum - 1;
    }
    if (doc.containsKey("quarterBell")) {
-        clockConfig.quarterBell = doc["quarterBell"].as<uint8_t>();
+        uint8_t bellNum = doc["quarterBell"].as<uint8_t>();
+        // Convert from 1-based (API) to 0-based (internal), or keep 255 (disabled)
+        clockConfig.quarterBell = (bellNum == 255) ? 255 : bellNum - 1;
    }
    LOG_DEBUG("ConfigManager - Updated Clock alerts");
 }
@@ -593,7 +599,7 @@ bool ConfigManager::loadClockConfig() {
        return false;
    }

-    StaticJsonDocument<512> doc;
+    StaticJsonDocument<1024> doc;  // Increased size for all settings
    DeserializationError error = deserializeJson(doc, file);
    file.close();

@@ -602,12 +608,34 @@ bool ConfigManager::loadClockConfig() {
        return false;
    }

+    // Clock enable/outputs
    if (doc.containsKey("enabled")) clockConfig.enabled = doc["enabled"].as<bool>();
    if (doc.containsKey("c1output")) clockConfig.c1output = doc["c1output"].as<uint8_t>();
    if (doc.containsKey("c2output")) clockConfig.c2output = doc["c2output"].as<uint8_t>();
    if (doc.containsKey("pulseDuration")) clockConfig.pulseDuration = doc["pulseDuration"].as<uint16_t>();
    if (doc.containsKey("pauseDuration")) clockConfig.pauseDuration = doc["pauseDuration"].as<uint16_t>();

+    // Alert settings
+    if (doc.containsKey("alertType")) clockConfig.alertType = doc["alertType"].as<String>();
+    if (doc.containsKey("alertRingInterval")) clockConfig.alertRingInterval = doc["alertRingInterval"].as<uint16_t>();
+    if (doc.containsKey("hourBell")) clockConfig.hourBell = doc["hourBell"].as<uint8_t>();
+    if (doc.containsKey("halfBell")) clockConfig.halfBell = doc["halfBell"].as<uint8_t>();
+    if (doc.containsKey("quarterBell")) clockConfig.quarterBell = doc["quarterBell"].as<uint8_t>();
+
+    // Backlight settings
+    if (doc.containsKey("backlight")) clockConfig.backlight = doc["backlight"].as<bool>();
+    if (doc.containsKey("backlightOutput")) clockConfig.backlightOutput = doc["backlightOutput"].as<uint8_t>();
+    if (doc.containsKey("backlightOnTime")) clockConfig.backlightOnTime = doc["backlightOnTime"].as<String>();
+    if (doc.containsKey("backlightOffTime")) clockConfig.backlightOffTime = doc["backlightOffTime"].as<String>();
+
+    // Silence period settings
+    if (doc.containsKey("daytimeSilenceEnabled")) clockConfig.daytimeSilenceEnabled = doc["daytimeSilenceEnabled"].as<bool>();
+    if (doc.containsKey("daytimeSilenceOnTime")) clockConfig.daytimeSilenceOnTime = doc["daytimeSilenceOnTime"].as<String>();
+    if (doc.containsKey("daytimeSilenceOffTime")) clockConfig.daytimeSilenceOffTime = doc["daytimeSilenceOffTime"].as<String>();
+    if (doc.containsKey("nighttimeSilenceEnabled")) clockConfig.nighttimeSilenceEnabled = doc["nighttimeSilenceEnabled"].as<bool>();
+    if (doc.containsKey("nighttimeSilenceOnTime")) clockConfig.nighttimeSilenceOnTime = doc["nighttimeSilenceOnTime"].as<String>();
+    if (doc.containsKey("nighttimeSilenceOffTime")) clockConfig.nighttimeSilenceOffTime = doc["nighttimeSilenceOffTime"].as<String>();
+
    LOG_DEBUG("ConfigManager - Clock config loaded");
    return true;
 }
@@ -615,14 +643,37 @@ bool ConfigManager::loadClockConfig() {
 bool ConfigManager::saveClockConfig() {
    if (!ensureSDCard()) return false;

-    StaticJsonDocument<512> doc;
+    StaticJsonDocument<1024> doc;  // Increased size for all settings
+
+    // Clock enable/outputs
    doc["enabled"] = clockConfig.enabled;
    doc["c1output"] = clockConfig.c1output;
    doc["c2output"] = clockConfig.c2output;
    doc["pulseDuration"] = clockConfig.pulseDuration;
    doc["pauseDuration"] = clockConfig.pauseDuration;

-    char buffer[512];
+    // Alert settings
+    doc["alertType"] = clockConfig.alertType;
+    doc["alertRingInterval"] = clockConfig.alertRingInterval;
+    doc["hourBell"] = clockConfig.hourBell;
+    doc["halfBell"] = clockConfig.halfBell;
+    doc["quarterBell"] = clockConfig.quarterBell;
+
+    // Backlight settings
+    doc["backlight"] = clockConfig.backlight;
+    doc["backlightOutput"] = clockConfig.backlightOutput;
+    doc["backlightOnTime"] = clockConfig.backlightOnTime;
+    doc["backlightOffTime"] = clockConfig.backlightOffTime;
+
+    // Silence period settings
+    doc["daytimeSilenceEnabled"] = clockConfig.daytimeSilenceEnabled;
+    doc["daytimeSilenceOnTime"] = clockConfig.daytimeSilenceOnTime;
+    doc["daytimeSilenceOffTime"] = clockConfig.daytimeSilenceOffTime;
+    doc["nighttimeSilenceEnabled"] = clockConfig.nighttimeSilenceEnabled;
+    doc["nighttimeSilenceOnTime"] = clockConfig.nighttimeSilenceOnTime;
+    doc["nighttimeSilenceOffTime"] = clockConfig.nighttimeSilenceOffTime;
+
+    char buffer[1024];
    size_t len = serializeJson(doc, buffer, sizeof(buffer));

    if (len == 0 || len >= sizeof(buffer)) {
@@ -1095,10 +1146,17 @@ String ConfigManager::getAllSettingsAsJson() const {
    time["daylightOffsetSec"] = timeConfig.daylightOffsetSec;
    
    // Bell durations (relay timings)
-    JsonObject bells = doc.createNestedObject("bells");
+    JsonObject bellDurations = doc.createNestedObject("bellDurations");
    for (uint8_t i = 0; i < 16; i++) {
        String key = String("b") + (i + 1);
-        bells[key] = bellConfig.durations[i];
+        bellDurations[key] = bellConfig.durations[i];
+    }
+
+    // Bell outputs (physical output mapping)
+    JsonObject bellOutputs = doc.createNestedObject("bellOutputs");
+    for (uint8_t i = 0; i < 16; i++) {
+        String key = String("b") + (i + 1);
+        bellOutputs[key] = bellConfig.outputs[i];
    }

    // Clock configuration
--- a/vesper/src/ConfigManager/ConfigManager.hpp
+++ b/vesper/src/ConfigManager/ConfigManager.hpp
@@ -70,6 +70,8 @@ public:
        String apPass;                                      // 🔐 AP is Open. No Password
        uint16_t discoveryPort = 32101;                     // 📡 Fixed discovery port
        bool permanentAPMode = false;                       // 🔘 Permanent AP mode toggle (stored on SD)
+        String defaultWifiSsid = "BellSystemsInfra";        // 📡 Default WiFi SSID to try on boot
+        String defaultWifiPsk = "v3sp3r_8998!";             // 🔐 Default WiFi password to try on boot
    };

    /**
--- a/vesper/src/FileManager/FileManager.cpp
+++ b/vesper/src/FileManager/FileManager.cpp
@@ -1,4 +1,5 @@
 #include "FileManager.hpp"
+#include "../BuiltInMelodies/BuiltInMelodies.hpp"

 FileManager::FileManager(ConfigManager* config) : configManager(config) {
    // Constructor - store reference to ConfigManager
@@ -23,15 +24,26 @@ bool FileManager::addMelody(JsonVariant doc) {
    }

    const char* url = doc["download_url"];
-    const char* filename = doc["melodys_uid"];
+    const char* melodyUid = doc["melodys_uid"];
+
+    // Check if this is a built-in melody - skip download if it exists
+    if (BuiltInMelodies::isBuiltInMelody(melodyUid)) {
+        const BuiltInMelodies::MelodyInfo* builtinMelody = BuiltInMelodies::findMelodyByUID(melodyUid);
+        if (builtinMelody != nullptr) {
+            LOG_INFO("Melody '%s' is a built-in melody, skipping download", melodyUid);
+            return true;  // Success - no download needed
+        }
+        // If starts with builtin_ but not found, log warning and try download anyway
+        LOG_WARNING("Melody '%s' has builtin_ prefix but not found in library, attempting download", melodyUid);
+    }

    // Download the melody file to /melodies directory
-    if (downloadFile(url, "/melodies", filename)) {
-        LOG_INFO("Melody download successful: %s", filename);
+    if (downloadFile(url, "/melodies", melodyUid)) {
+        LOG_INFO("Melody download successful: %s", melodyUid);
        return true;
    }

-    LOG_ERROR("Melody download failed: %s", filename);
+    LOG_ERROR("Melody download failed: %s", melodyUid);
    return false;
 }

@@ -62,11 +74,13 @@ bool FileManager::downloadFile(const String& url, const String& directory, const
    bool isHttps = url.startsWith("https://");

    HTTPClient http;
+    WiFiClientSecure* secureClient = nullptr;

    // Configure HTTP client based on protocol
    if (isHttps) {
-        WiFiClientSecure* secureClient = new WiFiClientSecure();
+        secureClient = new WiFiClientSecure();
        secureClient->setInsecure(); // Skip certificate validation for Firebase
+        secureClient->setTimeout(15); // 15 second timeout for TLS operations
        http.begin(*secureClient, url);
        LOG_DEBUG("Using HTTPS with secure client");
    } else {
@@ -77,17 +91,28 @@ bool FileManager::downloadFile(const String& url, const String& directory, const
    http.setTimeout(30000); // 30 second timeout for large files
    http.setFollowRedirects(HTTPC_FORCE_FOLLOW_REDIRECTS); // Follow redirects automatically

+    // Disable task watchdog for current task during blocking HTTPS operation
+    // The TLS handshake can take several seconds and would trigger watchdog
+    LOG_DEBUG("Disabling watchdog for download...");
+    esp_task_wdt_delete(NULL);
+
    LOG_DEBUG("Sending HTTP GET request...");
    int httpCode = http.GET();

+    // Re-enable task watchdog after HTTP request completes
+    esp_task_wdt_add(NULL);
+    LOG_DEBUG("Watchdog re-enabled after HTTP request");
+
    if (httpCode != HTTP_CODE_OK && httpCode != HTTP_CODE_MOVED_PERMANENTLY && httpCode != HTTP_CODE_FOUND) {
        LOG_ERROR("HTTP GET failed, code: %d, error: %s", httpCode, http.errorToString(httpCode).c_str());
        http.end();
+        if (secureClient) delete secureClient;
        return false;
    }

    if (!initializeSD()) {
        http.end();
+        if (secureClient) delete secureClient;
        return false;
    }

@@ -95,6 +120,7 @@ bool FileManager::downloadFile(const String& url, const String& directory, const
    if (!ensureDirectoryExists(directory)) {
        LOG_ERROR("Failed to create directory: %s", directory.c_str());
        http.end();
+        if (secureClient) delete secureClient;
        return false;
    }

@@ -107,6 +133,7 @@ bool FileManager::downloadFile(const String& url, const String& directory, const
    if (!file) {
        LOG_ERROR("Failed to open file for writing: %s", fullPath.c_str());
        http.end();
+        if (secureClient) delete secureClient;
        return false;
    }

@@ -134,7 +161,7 @@ bool FileManager::downloadFile(const String& url, const String& directory, const
                file.write(buffer, bytesRead);
                totalBytes += bytesRead;

-                // Log progress every 5KB
+                // Log progress every 5 seconds
                if (millis() - lastLog > 5000) {
                    LOG_DEBUG("Download progress: %u bytes", totalBytes);
                    lastLog = millis();
@@ -142,10 +169,10 @@ bool FileManager::downloadFile(const String& url, const String& directory, const
            }
        }

-        // Aggressive task yielding every 100ms to prevent watchdog timeout
-        if (millis() - lastYield > 100) {
+        // Aggressive task yielding every 50ms to prevent watchdog timeout
+        if (millis() - lastYield > 50) {
            yield();
-            vTaskDelay(1 / portTICK_PERIOD_MS); // Let other tasks run
+            vTaskDelay(5 / portTICK_PERIOD_MS); // Let other tasks run (5ms)
            lastYield = millis();
        }

@@ -154,14 +181,16 @@ bool FileManager::downloadFile(const String& url, const String& directory, const
            break;
        }

-        // Small delay if no data available yet
+        // Yield and small delay if no data available yet
        if (!availableSize) {
-            delay(10);
+            yield();
+            vTaskDelay(10 / portTICK_PERIOD_MS);
        }
    }

    file.close();
    http.end();
+    if (secureClient) delete secureClient;
    LOG_INFO("Download complete, file saved to: %s (%u bytes)", fullPath.c_str(), totalBytes);
    return true;
 }
--- a/vesper/src/FileManager/FileManager.hpp
+++ b/vesper/src/FileManager/FileManager.hpp
@@ -24,6 +24,7 @@
 #include <WiFiClient.h>
 #include <WiFiClientSecure.h>
 #include <ArduinoJson.h>
+#include <esp_task_wdt.h>
 #include "../Logging/Logging.hpp"
 #include "../ConfigManager/ConfigManager.hpp"

--- a/vesper/src/Logging/Logging.cpp
+++ b/vesper/src/Logging/Logging.cpp
@@ -35,8 +35,6 @@ bool Logging::isLevelEnabled(LogLevel level) {
 }

 void Logging::error(const char* format, ...) {
-    if (!isLevelEnabled(ERROR)) return;
-
    va_list args;
    va_start(args, format);
    log(ERROR, "🔴 EROR", format, args);
@@ -44,8 +42,6 @@ void Logging::error(const char* format, ...) {
 }

 void Logging::warning(const char* format, ...) {
-    if (!isLevelEnabled(WARNING)) return;
-
    va_list args;
    va_start(args, format);
    log(WARNING, "🟡 WARN", format, args);
@@ -53,8 +49,6 @@ void Logging::warning(const char* format, ...) {
 }

 void Logging::info(const char* format, ...) {
-    if (!isLevelEnabled(INFO)) return;
-
    va_list args;
    va_start(args, format);
    log(INFO, "🟢 INFO", format, args);
@@ -62,8 +56,6 @@ void Logging::info(const char* format, ...) {
 }

 void Logging::debug(const char* format, ...) {
-    if (!isLevelEnabled(DEBUG)) return;
-
    va_list args;
    va_start(args, format);
    log(DEBUG, "🐞 DEBG", format, args);
@@ -71,8 +63,6 @@ void Logging::debug(const char* format, ...) {
 }

 void Logging::verbose(const char* format, ...) {
-    if (!isLevelEnabled(VERBOSE)) return;
-
    va_list args;
    va_start(args, format);
    log(VERBOSE, "🧾 VERB", format, args);
@@ -80,19 +70,33 @@ void Logging::verbose(const char* format, ...) {
 }

 void Logging::log(LogLevel level, const char* levelStr, const char* format, va_list args) {
-    // Print the formatted message
+    // Check if ANY output needs this log level
+    bool serialEnabled = (currentLevel >= level);
+    bool mqttEnabled = (mqttLogLevel >= level && mqttPublishCallback);
+    // bool sdEnabled = (sdLogLevel >= level && sdLogCallback);  // Future: SD logging
+
+    // Early exit if no outputs need this message
+    if (!serialEnabled && !mqttEnabled) {
+        return;
+    }
+
+    // Format the message once (only if at least one output needs it)
    char buffer[512];
    vsnprintf(buffer, sizeof(buffer), format, args);

-    // Serial output
+    // Serial output (independent check)
+    if (serialEnabled) {
        Serial.printf("[%s]  ", levelStr);
        Serial.print(buffer);
        Serial.println();
+    }

-    // MQTT output (if enabled and callback is set)
-    if (mqttLogLevel >= level && mqttPublishCallback) {
+    // MQTT output (independent check)
+    if (mqttEnabled) {
        publishToMqtt(level, levelStr, buffer);
    }
+
+    // Future: SD logging would go here with its own independent check
 }

 void Logging::publishToMqtt(LogLevel level, const char* levelStr, const char* message) {
--- a/vesper/src/Networking/Networking.cpp
+++ b/vesper/src/Networking/Networking.cpp
@@ -71,63 +71,97 @@ void Networking::begin() {
        return;
    }

+    // ETHERNET DISABLED - WiFi only mode
    // Start Ethernet hardware
-    auto& hwConfig = _configManager.getHardwareConfig();
-    ETH.begin(hwConfig.ethPhyType, hwConfig.ethPhyAddr, hwConfig.ethPhyCs,
-              hwConfig.ethPhyIrq, hwConfig.ethPhyRst, SPI);
+    // auto& hwConfig = _configManager.getHardwareConfig();
+    // ETH.begin(hwConfig.ethPhyType, hwConfig.ethPhyAddr, hwConfig.ethPhyCs,
+    //           hwConfig.ethPhyIrq, hwConfig.ethPhyRst, SPI);

-    // Start connection sequence
-    LOG_INFO("Starting network connection sequence...");
-    startEthernetConnection();
+    // Start connection sequence - Skip Ethernet, go directly to WiFi
+    LOG_INFO("Starting WiFi connection (Ethernet disabled)...");
+    startWiFiConnection();
 }

 void Networking::startEthernetConnection() {
-    LOG_INFO("Attempting Ethernet connection...");
-    setState(NetworkState::CONNECTING_ETHERNET);
-    
-    // Check if Ethernet hardware initialization failed
-    if (!ETH.linkUp()) {
-        LOG_WARNING("Ethernet hardware not detected or failed to initialize");
-        LOG_INFO("Falling back to WiFi immediately");
+    // ETHERNET DISABLED - Skip to WiFi immediately
+    LOG_DEBUG("Ethernet connection disabled - falling back to WiFi");
    startWiFiConnection();
-        return;
-    }

-    // Ethernet will auto-connect via events
-    // Set timeout for Ethernet attempt (5 seconds)
-    _lastConnectionAttempt = millis();
-    
-    // Start reconnection timer to handle timeout
-    xTimerStart(_reconnectionTimer, 0);
+    // Original Ethernet code (DISABLED):
+    // LOG_INFO("Attempting Ethernet connection...");
+    // setState(NetworkState::CONNECTING_ETHERNET);
+    //
+    // // Check if Ethernet hardware initialization failed
+    // if (!ETH.linkUp()) {
+    //     LOG_WARNING("Ethernet hardware not detected or failed to initialize");
+    //     LOG_INFO("Falling back to WiFi immediately");
+    //     startWiFiConnection();
+    //     return;
+    // }
+    //
+    // // Ethernet will auto-connect via events
+    // // Set timeout for Ethernet attempt (5 seconds)
+    // _lastConnectionAttempt = millis();
+    //
+    // // Start reconnection timer to handle timeout
+    // xTimerStart(_reconnectionTimer, 0);
 }

 void Networking::startWiFiConnection() {
    LOG_INFO("Attempting WiFi connection...");
    setState(NetworkState::CONNECTING_WIFI);

-    if (!hasValidWiFiCredentials()) {
-        LOG_WARNING("No valid WiFi credentials found");
-        if (!_bootSequenceComplete) {
-            // No credentials during boot - start portal
-            startWiFiPortal();
-        }
-        return;
-    }
+    // ALWAYS try default credentials first (for bundled router deployment)
+    auto& netConfig = _configManager.getNetworkConfig();

-    // Get and log saved credentials (for debugging)
-    String savedSSID = _wifiManager->getWiFiSSID(true);
-    LOG_INFO("Using WiFiManager saved credentials - SSID: %s", savedSSID.c_str());
+    LOG_INFO("Using DEFAULT WiFi credentials - SSID: %s", netConfig.defaultWifiSsid.c_str());

    applyNetworkConfig(false); // false = WiFi config
    WiFi.mode(WIFI_STA);
-    
-    // Let WiFiManager handle credentials (uses saved SSID/password)
-    WiFi.begin();
+    WiFi.begin(netConfig.defaultWifiSsid.c_str(), netConfig.defaultWifiPsk.c_str());

    _lastConnectionAttempt = millis();
-    
-    // Start reconnection timer to handle timeout
    xTimerStart(_reconnectionTimer, 0);
+
+    // Original WiFiManager fallback code (DISABLED for fixed deployment):
+    // // First, try default credentials if this is the first boot attempt
+    // if (!_bootSequenceComplete && !hasValidWiFiCredentials()) {
+    //     LOG_INFO("No saved credentials - trying default WiFi credentials");
+    //     auto& netConfig = _configManager.getNetworkConfig();
+    //
+    //     applyNetworkConfig(false); // false = WiFi config
+    //     WiFi.mode(WIFI_STA);
+    //     WiFi.begin(netConfig.defaultWifiSsid.c_str(), netConfig.defaultWifiPsk.c_str());
+    //
+    //     _lastConnectionAttempt = millis();
+    //     xTimerStart(_reconnectionTimer, 0);
+    //     return;
+    // }
+    //
+    // // Check if we have valid saved credentials
+    // if (!hasValidWiFiCredentials()) {
+    //     LOG_WARNING("No valid WiFi credentials found");
+    //     if (!_bootSequenceComplete) {
+    //         // No credentials during boot - start portal
+    //         startWiFiPortal();
+    //     }
+    //     return;
+    // }
+    //
+    // // Get and log saved credentials (for debugging)
+    // String savedSSID = _wifiManager->getWiFiSSID(true);
+    // LOG_INFO("Using WiFiManager saved credentials - SSID: %s", savedSSID.c_str());
+    //
+    // applyNetworkConfig(false); // false = WiFi config
+    // WiFi.mode(WIFI_STA);
+    //
+    // // Let WiFiManager handle credentials (uses saved SSID/password)
+    // WiFi.begin();
+    //
+    // _lastConnectionAttempt = millis();
+    //
+    // // Start reconnection timer to handle timeout
+    // xTimerStart(_reconnectionTimer, 0);
 }

 void Networking::startWiFiPortal() {
@@ -171,16 +205,17 @@ void Networking::handleReconnection() {

    LOG_DEBUG("Attempting reconnection...");

+    // ETHERNET DISABLED - Skip Ethernet timeout checks
    // Check for Ethernet timeout (fall back to WiFi)
-    if (_state == NetworkState::CONNECTING_ETHERNET) {
-        unsigned long now = millis();
-        if (now - _lastConnectionAttempt > 5000) { // 5 second timeout
-            LOG_INFO("Ethernet connection timeout - falling back to WiFi");
-            startWiFiConnection();
-            return;
-        }
-        return; // Still waiting for Ethernet
-    }
+    // if (_state == NetworkState::CONNECTING_ETHERNET) {
+    //     unsigned long now = millis();
+    //     if (now - _lastConnectionAttempt > 5000) { // 5 second timeout
+    //         LOG_INFO("Ethernet connection timeout - falling back to WiFi");
+    //         startWiFiConnection();
+    //         return;
+    //     }
+    //     return; // Still waiting for Ethernet
+    // }

    // Check for WiFi timeout
    if (_state == NetworkState::CONNECTING_WIFI) {
@@ -216,12 +251,8 @@ void Networking::handleReconnection() {
        return; // Still waiting for WiFi
    }

-    // State is DISCONNECTED - decide what to try
-    if (_ethernetCableConnected) {
-        LOG_INFO("Ethernet cable detected - trying Ethernet");
-        startEthernetConnection();
-    } else {
-        LOG_INFO("No Ethernet - trying WiFi");
+    // State is DISCONNECTED - WiFi only mode (Ethernet disabled)
+    LOG_INFO("Disconnected - trying WiFi");
    if (hasValidWiFiCredentials()) {
        startWiFiConnection();
    } else if (!_bootSequenceComplete) {
@@ -230,7 +261,6 @@ void Networking::handleReconnection() {
    } else {
        LOG_WARNING("No WiFi credentials and boot sequence complete - waiting");
    }
-    }
 }

 // ════════════════════════════════════════════════════════════════════════════
@@ -244,8 +274,8 @@ bool Networking::isHealthy() const {
        return false;
    }

-    // Check connection state
-    if (_state != NetworkState::CONNECTED_ETHERNET && _state != NetworkState::CONNECTED_WIFI) {
+    // Check connection state (Ethernet disabled, only check WiFi or AP)
+    if (_state != NetworkState::CONNECTED_WIFI && _state != NetworkState::AP_MODE_PERMANENT) {
        LOG_DEBUG("Networking: Unhealthy - Not in connected state");
        return false;
    }
@@ -272,13 +302,14 @@ bool Networking::isHealthy() const {
        }
    }

+    // ETHERNET DISABLED - Removed Ethernet link check
    // For Ethernet connections, check link status
-    if (_activeConnection == ConnectionType::ETHERNET) {
-        if (!ETH.linkUp()) {
-            LOG_DEBUG("Networking: Unhealthy - Ethernet link down");
-            return false;
-        }
-    }
+    // if (_activeConnection == ConnectionType::ETHERNET) {
+    //     if (!ETH.linkUp()) {
+    //         LOG_DEBUG("Networking: Unhealthy - Ethernet link down");
+    //         return false;
+    //     }
+    // }

    return true;
 }
@@ -305,35 +336,43 @@ void Networking::notifyConnectionChange(bool connected) {
    }
 }

-// Event handlers
+// Event handlers (ETHERNET DISABLED)
 void Networking::onEthernetConnected() {
-    LOG_INFO("Ethernet connected successfully");
-    setState(NetworkState::CONNECTED_ETHERNET);
-    setActiveConnection(ConnectionType::ETHERNET);
+    // ETHERNET DISABLED - This should never be called
+    LOG_WARNING("Ethernet event received but Ethernet is disabled - ignoring");

-    // Stop WiFi if it was running
-    if (WiFi.getMode() != WIFI_OFF) {
-        WiFi.disconnect(true);
-        WiFi.mode(WIFI_OFF);
-    }
-    
-    // Stop reconnection timer
-    xTimerStop(_reconnectionTimer, 0);
-    
-    notifyConnectionChange(true);
+    // Original code (DISABLED):
+    // LOG_INFO("Ethernet connected successfully");
+    // setState(NetworkState::CONNECTED_ETHERNET);
+    // setActiveConnection(ConnectionType::ETHERNET);
+    //
+    // // Stop WiFi if it was running
+    // if (WiFi.getMode() != WIFI_OFF) {
+    //     WiFi.disconnect(true);
+    //     WiFi.mode(WIFI_OFF);
+    // }
+    //
+    // // Stop reconnection timer
+    // xTimerStop(_reconnectionTimer, 0);
+    //
+    // notifyConnectionChange(true);
 }

 void Networking::onEthernetDisconnected() {
-    LOG_WARNING("Ethernet disconnected");
+    // ETHERNET DISABLED - This should never be called
+    LOG_WARNING("Ethernet disconnect event received but Ethernet is disabled - ignoring");

-    if (_activeConnection == ConnectionType::ETHERNET) {
-        setState(NetworkState::DISCONNECTED);
-        setActiveConnection(ConnectionType::NONE);
-        notifyConnectionChange(false);
-        
-        // Start reconnection attempts
-        xTimerStart(_reconnectionTimer, 0);
-    }
+    // Original code (DISABLED):
+    // LOG_WARNING("Ethernet disconnected");
+    //
+    // if (_activeConnection == ConnectionType::ETHERNET) {
+    //     setState(NetworkState::DISCONNECTED);
+    //     setActiveConnection(ConnectionType::NONE);
+    //     notifyConnectionChange(false);
+    //
+    //     // Start reconnection attempts
+    //     xTimerStart(_reconnectionTimer, 0);
+    // }
 }

 void Networking::onWiFiConnected() {
@@ -367,35 +406,37 @@ void Networking::onWiFiDisconnected() {
 }

 void Networking::onEthernetCableChange(bool connected) {
-    _ethernetCableConnected = connected;
-    LOG_INFO("Ethernet cable %s", connected ? "connected" : "disconnected");
+    // ETHERNET DISABLED - Ignore cable events
+    LOG_DEBUG("Ethernet cable event ignored (Ethernet disabled)");

-    if (connected && _activeConnection != ConnectionType::ETHERNET) {
-        // Cable connected and we're not using Ethernet - try to connect
-        startEthernetConnection();
-    }
+    // Original code (DISABLED):
+    // _ethernetCableConnected = connected;
+    // LOG_INFO("Ethernet cable %s", connected ? "connected" : "disconnected");
+    //
+    // if (connected && _activeConnection != ConnectionType::ETHERNET) {
+    //     // Cable connected and we're not using Ethernet - try to connect
+    //     startEthernetConnection();
+    // }
 }

 // Utility methods
 void Networking::applyNetworkConfig(bool ethernet) {
    auto& netConfig = _configManager.getNetworkConfig();

+    // ETHERNET DISABLED - Only apply WiFi config
+    if (ethernet) {
+        LOG_WARNING("applyNetworkConfig called with ethernet=true but Ethernet is disabled");
+        return;
+    }
+
    if (netConfig.useStaticIP) {
        LOG_INFO("Applying static IP configuration");
-        if (ethernet) {
-            ETH.config(netConfig.ip, netConfig.gateway, netConfig.subnet, netConfig.dns1, netConfig.dns2);
-        } else {
        WiFi.config(netConfig.ip, netConfig.gateway, netConfig.subnet, netConfig.dns1, netConfig.dns2);
-        }
    } else {
        LOG_INFO("Using DHCP configuration");
    }

-    if (ethernet) {
-        ETH.setHostname(netConfig.hostname.c_str());
-    } else {
    WiFi.setHostname(netConfig.hostname.c_str());
-    }
 }

 bool Networking::hasValidWiFiCredentials() {
@@ -413,7 +454,9 @@ bool Networking::isConnected() const {
 String Networking::getLocalIP() const {
    switch (_activeConnection) {
        case ConnectionType::ETHERNET:
-            return ETH.localIP().toString();
+            // ETHERNET DISABLED - Should never reach here
+            LOG_WARNING("getLocalIP called with ETHERNET type but Ethernet is disabled");
+            return "0.0.0.0";
        case ConnectionType::WIFI:
            return WiFi.localIP().toString();
        case ConnectionType::AP:
@@ -426,7 +469,9 @@ String Networking::getLocalIP() const {
 String Networking::getGateway() const {
    switch (_activeConnection) {
        case ConnectionType::ETHERNET:
-            return ETH.gatewayIP().toString();
+            // ETHERNET DISABLED - Should never reach here
+            LOG_WARNING("getGateway called with ETHERNET type but Ethernet is disabled");
+            return "0.0.0.0";
        case ConnectionType::WIFI:
            return WiFi.gatewayIP().toString();
        default:
@@ -445,9 +490,9 @@ void Networking::forceReconnect() {
        WiFi.mode(WIFI_OFF);
    }

-    // Restart connection sequence
+    // Restart connection sequence - WiFi only (Ethernet disabled)
    delay(1000);
-    startEthernetConnection();
+    startWiFiConnection();
 }

 // Static callbacks
@@ -457,32 +502,16 @@ void Networking::networkEventHandler(arduino_event_id_t event, arduino_event_inf
    LOG_DEBUG("Network event: %d", event);

    switch (event) {
+        // ETHERNET EVENTS DISABLED - Ignored
        case ARDUINO_EVENT_ETH_START:
-            LOG_DEBUG("ETH Started");
-            break;
-            
        case ARDUINO_EVENT_ETH_CONNECTED:
-            LOG_DEBUG("ETH Cable Connected");
-            _instance->onEthernetCableChange(true);
-            break;
-            
        case ARDUINO_EVENT_ETH_GOT_IP:
-            LOG_INFO("ETH Got IP: %s", ETH.localIP().toString().c_str());
-            _instance->applyNetworkConfig(true);
-            _instance->onEthernetConnected();
-            break;
-            
        case ARDUINO_EVENT_ETH_DISCONNECTED:
-            LOG_WARNING("ETH Cable Disconnected");
-            _instance->onEthernetCableChange(false);
-            _instance->onEthernetDisconnected();
-            break;
-            
        case ARDUINO_EVENT_ETH_STOP:
-            LOG_INFO("ETH Stopped");
-            _instance->onEthernetDisconnected();
+            LOG_DEBUG("Ethernet event ignored (Ethernet disabled)");
            break;

+        // WiFi events (ACTIVE)
        case ARDUINO_EVENT_WIFI_STA_GOT_IP:
            LOG_INFO("WiFi Got IP: %s", WiFi.localIP().toString().c_str());
            _instance->onWiFiConnected();
--- a/vesper/src/OTAManager/OTAManager.cpp
+++ b/vesper/src/OTAManager/OTAManager.cpp
@@ -2,13 +2,17 @@
 #include "../ConfigManager/ConfigManager.hpp"
 #include "../Logging/Logging.hpp"
 #include "../Player/Player.hpp"
+#include "../SDCardMutex/SDCardMutex.hpp"
 #include <nvs_flash.h>
 #include <nvs.h>
+#include <esp_task_wdt.h>

 OTAManager::OTAManager(ConfigManager& configManager)
    : _configManager(configManager)
    , _fileManager(nullptr)
    , _player(nullptr)
+    , _timeKeeper(nullptr)
+    , _telemetry(nullptr)
    , _status(Status::IDLE)
    , _lastError(ErrorCode::NONE)
    , _availableVersion(0.0f)
@@ -22,10 +26,23 @@ OTAManager::OTAManager(ConfigManager& configManager)
    , _progressCallback(nullptr)
    , _statusCallback(nullptr)
    , _scheduledCheckTimer(NULL)
-    , _initialCheckTimer(NULL) {
+    , _initialCheckTimer(NULL)
+    , _otaWorkerTask(NULL)
+    , _otaWorkSignal(NULL)
+    , _pendingWork(OTAWorkType::NONE) {
 }

 OTAManager::~OTAManager() {
+    // Clean up worker task and semaphore
+    if (_otaWorkerTask != NULL) {
+        vTaskDelete(_otaWorkerTask);
+        _otaWorkerTask = NULL;
+    }
+    if (_otaWorkSignal != NULL) {
+        vSemaphoreDelete(_otaWorkSignal);
+        _otaWorkSignal = NULL;
+    }
+
    if (_scheduledCheckTimer != NULL) {
        xTimerStop(_scheduledCheckTimer, 0);
        xTimerDelete(_scheduledCheckTimer, portMAX_DELAY);
@@ -42,6 +59,33 @@ void OTAManager::begin() {
    LOG_INFO("OTA Manager initialized");
    setStatus(Status::IDLE);

+    // Create semaphore for worker task signaling
+    _otaWorkSignal = xSemaphoreCreateBinary();
+    if (_otaWorkSignal == NULL) {
+        LOG_ERROR("Failed to create OTA work semaphore!");
+        return;
+    }
+
+    // Create dedicated worker task with 8KB stack (prevents timer task overflow)
+    BaseType_t taskCreated = xTaskCreatePinnedToCore(
+        otaWorkerTaskFunction,
+        "OTA_Worker",
+        8192,                   // 8KB stack - plenty for HTTP and JSON operations
+        this,                   // Pass OTAManager instance
+        2,                      // Priority 2 (lower than critical tasks)
+        &_otaWorkerTask,
+        0                       // Core 0
+    );
+
+    if (taskCreated != pdPASS) {
+        LOG_ERROR("Failed to create OTA worker task!");
+        vSemaphoreDelete(_otaWorkSignal);
+        _otaWorkSignal = NULL;
+        return;
+    }
+
+    LOG_INFO("OTA worker task created with 8KB stack on Core 0");
+
    // Create timer for scheduled checks (checks every minute if it's 3:00 AM)
    _scheduledCheckTimer = xTimerCreate(
        "OTA_Schedule",
@@ -84,22 +128,35 @@ void OTAManager::setPlayer(Player* player) {
    _player = player;
 }

+void OTAManager::setTimeKeeper(Timekeeper* tk) {
+    _timeKeeper = tk;
+}
+
+void OTAManager::setTelemetry(Telemetry* telemetry) {
+    _telemetry = telemetry;
+}
+
 // ✅ NEW: Static timer callback for initial boot check
+// CRITICAL: Timer callbacks run in Timer Service task with limited stack!
+// We ONLY set a flag here - actual work is done by dedicated worker task
 void OTAManager::initialCheckCallback(TimerHandle_t xTimer) {
    OTAManager* ota = static_cast<OTAManager*>(pvTimerGetTimerID(xTimer));
-    if (ota) {
-        LOG_INFO("🚀 Running initial OTA check (non-blocking, async)");
-        ota->performInitialCheck();
+    if (ota && ota->_otaWorkSignal) {
+        // Signal worker task to perform initial check
+        ota->_pendingWork = OTAWorkType::INITIAL_CHECK;
+        xSemaphoreGive(ota->_otaWorkSignal);
    }
 }

 // ✅ NEW: Perform initial OTA check (async, non-blocking)
 void OTAManager::performInitialCheck() {
-    // This runs asynchronously, won't block WebSocket/UDP/MQTT
+    // This runs asynchronously in worker task, won't block WebSocket/UDP/MQTT
    checkForUpdates();
 }

 // ✅ NEW: Static timer callback for scheduled checks
+// CRITICAL: Timer callbacks run in Timer Service task with limited stack!
+// We ONLY set a flag here - actual work is done by dedicated worker task
 void OTAManager::scheduledCheckCallback(TimerHandle_t xTimer) {
    OTAManager* ota = static_cast<OTAManager*>(pvTimerGetTimerID(xTimer));

@@ -109,13 +166,12 @@ void OTAManager::scheduledCheckCallback(TimerHandle_t xTimer) {

    // Only proceed if it's exactly 3:00 AM
    if (timeinfo->tm_hour == 3 && timeinfo->tm_min == 0) {
-        LOG_INFO("🕒 3:00 AM - Running scheduled OTA check");
-
-        // Check if player is idle before proceeding
-        if (!ota->isPlayerActive()) {
-            LOG_INFO("✅ Player is idle - checking for emergency updates");
-            ota->checkForEmergencyUpdates();
-        } else {
+        // Check if player is idle before signaling worker
+        if (!ota->isPlayerActive() && ota->_otaWorkSignal) {
+            // Signal worker task to perform scheduled check
+            ota->_pendingWork = OTAWorkType::SCHEDULED_CHECK;
+            xSemaphoreGive(ota->_otaWorkSignal);
+        } else if (ota->isPlayerActive()) {
            LOG_WARNING("⚠️ Player is active - skipping scheduled update check");
        }
    }
@@ -356,9 +412,10 @@ bool OTAManager::downloadAndInstall(const String& channel) {
        LOG_INFO("OTA: Trying firmware download from server %d/%d: %s",
                serverIndex + 1, servers.size(), baseUrl.c_str());

-        if (downloadToSD(firmwareUrl, _availableChecksum, _expectedFileSize)) {
-            // Success! Now install from SD
-            return installFromSD("/firmware/staged_update.bin");
+        // 🔥 Download directly to flash (bypassing problematic SD card writes)
+        if (downloadDirectToFlash(firmwareUrl, _expectedFileSize)) {
+            LOG_INFO("✅ OTA update successful!");
+            return true;
        } else {
            LOG_WARNING("OTA: Firmware download failed from %s, trying next server", baseUrl.c_str());
        }
@@ -369,6 +426,173 @@ bool OTAManager::downloadAndInstall(const String& channel) {
    return false;
 }

+// 🔥 NEW: Download directly to flash memory, bypassing SD card
+bool OTAManager::downloadDirectToFlash(const String& url, size_t expectedSize) {
+    LOG_INFO("OTA: Starting direct-to-flash download (bypassing SD card)");
+
+    HTTPClient http;
+    http.begin(url.c_str());
+    http.setTimeout(30000); // 30 seconds
+
+    int httpCode = http.GET();
+
+    if (httpCode != HTTP_CODE_OK) {
+        LOG_ERROR("Download HTTP error code: %d", httpCode);
+        setStatus(Status::FAILED, ErrorCode::HTTP_ERROR);
+        http.end();
+        return false;
+    }
+
+    int contentLength = http.getSize();
+
+    LOG_INFO("OTA: HTTP Response Code: %d", httpCode);
+    LOG_INFO("OTA: Content-Length: %d bytes", contentLength);
+
+    if (contentLength <= 0) {
+        LOG_ERROR("Invalid content length");
+        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
+        http.end();
+        return false;
+    }
+
+    // Validate file size
+    if (expectedSize > 0 && (size_t)contentLength != expectedSize) {
+        LOG_ERROR("OTA: File size mismatch! Expected: %u, Got: %d", expectedSize, contentLength);
+        setStatus(Status::FAILED, ErrorCode::SIZE_MISMATCH);
+        http.end();
+        return false;
+    }
+
+    // ═══════════════════════════════════════════════════════════════════════════
+    // ENTER OTA FREEZE MODE - Pause all non-critical systems
+    // ═══════════════════════════════════════════════════════════════════════════
+    LOG_INFO("OTA: Entering freeze mode - pausing TimeKeeper and Telemetry");
+
+    if (_timeKeeper) {
+        _timeKeeper->pauseClockUpdates();
+    }
+
+    if (_telemetry) {
+        _telemetry->pause();
+    }
+
+    // Begin OTA update to flash with MD5 validation enabled
+    if (!Update.begin(contentLength)) {
+        LOG_ERROR("Not enough space to begin OTA update");
+        setStatus(Status::FAILED, ErrorCode::INSUFFICIENT_SPACE);
+        http.end();
+
+        // Resume systems
+        if (_timeKeeper) _timeKeeper->resumeClockUpdates();
+        if (_telemetry) _telemetry->resume();
+
+        return false;
+    }
+
+    LOG_INFO("OTA: Update partition ready, starting stream write...");
+    LOG_INFO("OTA: Checksum validation will be performed by ESP32 bootloader");
+    setStatus(Status::INSTALLING);
+
+    // Stream directly to flash with periodic watchdog feeding
+    WiFiClient* stream = http.getStreamPtr();
+    uint8_t buffer[4096];  // 4KB buffer for efficient transfer
+    size_t written = 0;
+    size_t lastLoggedPercent = 0;
+    unsigned long lastWatchdogReset = millis();
+
+    while (http.connected() && written < (size_t)contentLength) {
+        size_t available = stream->available();
+        if (available) {
+            size_t toRead = min(available, sizeof(buffer));
+            size_t bytesRead = stream->readBytes(buffer, toRead);
+
+            if (bytesRead > 0) {
+                // Write to flash
+                size_t bytesWritten = Update.write(buffer, bytesRead);
+
+                if (bytesWritten != bytesRead) {
+                    LOG_ERROR("OTA: Flash write failed at offset %u (%u/%u bytes written)",
+                             written, bytesWritten, bytesRead);
+                    http.end();
+
+                    // Resume systems
+                    if (_timeKeeper) _timeKeeper->resumeClockUpdates();
+                    if (_telemetry) _telemetry->resume();
+
+                    setStatus(Status::FAILED, ErrorCode::WRITE_FAILED);
+                    return false;
+                }
+
+                written += bytesWritten;
+
+                // Log progress every 20%
+                size_t currentPercent = (written * 100) / contentLength;
+                if (currentPercent >= lastLoggedPercent + 20) {
+                    LOG_INFO("OTA: Flash write progress: %u%% (%u/%u bytes)",
+                             currentPercent, written, contentLength);
+                    lastLoggedPercent = currentPercent;
+                }
+            }
+        }
+
+        // Feed watchdog every 500ms to prevent timeout
+        if (millis() - lastWatchdogReset > 500) {
+            esp_task_wdt_reset();
+            lastWatchdogReset = millis();
+        }
+
+        // Small yield to prevent tight loop
+        yield();
+    }
+
+    http.end();
+
+    // ═══════════════════════════════════════════════════════════════════════════
+    // EXIT OTA FREEZE MODE - Resume all paused systems
+    // ═══════════════════════════════════════════════════════════════════════════
+    LOG_INFO("OTA: Exiting freeze mode - resuming TimeKeeper and Telemetry");
+
+    if (_timeKeeper) {
+        _timeKeeper->resumeClockUpdates();
+    }
+
+    if (_telemetry) {
+        _telemetry->resume();
+    }
+
+    if (written == (size_t)contentLength) {
+        LOG_INFO("OTA: Successfully written %u bytes to flash", written);
+    } else {
+        LOG_ERROR("OTA: Written only %u/%d bytes", written, contentLength);
+        setStatus(Status::FAILED, ErrorCode::WRITE_FAILED);
+        return false;
+    }
+
+    if (Update.end(true)) { // true = set new boot partition
+        LOG_INFO("OTA: Update complete!");
+        if (Update.isFinished()) {
+            setStatus(Status::SUCCESS);
+            LOG_INFO("OTA: Firmware update successful. Rebooting...");
+
+            // Update version in config
+            _configManager.setFwVersion(String(_availableVersion));
+            _configManager.saveDeviceConfig();
+
+            delay(1000);
+            ESP.restart();
+            return true;
+        } else {
+            LOG_ERROR("OTA: Update not finished");
+            setStatus(Status::FAILED, ErrorCode::VERIFICATION_FAILED);
+            return false;
+        }
+    } else {
+        LOG_ERROR("OTA: Update error: %s", Update.errorString());
+        setStatus(Status::FAILED, ErrorCode::VERIFICATION_FAILED);
+        return false;
+    }
+}
+
 bool OTAManager::downloadToSD(const String& url, const String& expectedChecksum, size_t expectedSize) {
    if (!_fileManager) {
        LOG_ERROR("FileManager not set!");
@@ -384,6 +608,10 @@ bool OTAManager::downloadToSD(const String& url, const String& expectedChecksum,
    
    HTTPClient http;
    http.begin(url.c_str());
+
+    // Set timeout to prevent hanging
+    http.setTimeout(30000); // 30 seconds
+
    int httpCode = http.GET();

    if (httpCode != HTTP_CODE_OK) {
@@ -394,6 +622,10 @@ bool OTAManager::downloadToSD(const String& url, const String& expectedChecksum,
    }

    int contentLength = http.getSize();
+
+    // Log HTTP response headers for debugging
+    LOG_INFO("OTA: HTTP Response Code: %d", httpCode);
+    LOG_INFO("OTA: Content-Length header: %d bytes", contentLength);
    if (contentLength <= 0) {
        LOG_ERROR("Invalid content length");
        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
@@ -419,55 +651,142 @@ bool OTAManager::downloadToSD(const String& url, const String& expectedChecksum,
    
    LOG_INFO("OTA: Starting download of %d bytes...", contentLength);

-    // Open file for writing
-    File file = SD.open(tempPath.c_str(), FILE_WRITE);
-    if (!file) {
-        LOG_ERROR("Failed to create temporary update file");
+    // ═══════════════════════════════════════════════════════════════════════════
+    // ENTER OTA FREEZE MODE - Pause all non-critical systems to prevent SD contention
+    // ═══════════════════════════════════════════════════════════════════════════
+    LOG_INFO("OTA: Entering freeze mode - pausing TimeKeeper and Telemetry");
+
+    if (_timeKeeper) {
+        _timeKeeper->pauseClockUpdates();
+    }
+
+    if (_telemetry) {
+        _telemetry->pause();
+    }
+
+    // 🔒 ACQUIRE SD CARD MUTEX - Prevents concurrent SD access
+    LOG_INFO("OTA: Acquiring SD card mutex for safe file operations");
+    if (!SDCardMutex::getInstance().lock(10000)) {  // 10 second timeout
+        LOG_ERROR("OTA: Failed to acquire SD card mutex!");
+        if (_timeKeeper) _timeKeeper->resumeClockUpdates();
+        if (_telemetry) _telemetry->resume();
        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
        http.end();
        return false;
    }

+    // Delete file if it exists, before opening
+    if (SD.exists(tempPath.c_str())) {
+        LOG_INFO("OTA: Removing existing staged update file");
+        if (!SD.remove(tempPath.c_str())) {
+            LOG_ERROR("OTA: Failed to remove existing file!");
+        }
+        delay(200); // Give SD card time to complete deletion
+    }
+
+    // Open file for writing
+    File file = SD.open(tempPath.c_str(), FILE_WRITE);
+    if (!file) {
+        LOG_ERROR("Failed to create temporary update file");
+
+        // Release mutex and resume systems before returning
+        SDCardMutex::getInstance().unlock();
+        if (_timeKeeper) _timeKeeper->resumeClockUpdates();
+        if (_telemetry) _telemetry->resume();
+
+        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
+        http.end();
+        return false;
+    }
+
+    LOG_INFO("OTA: File opened successfully for writing (mutex locked)");
+
    WiFiClient* stream = http.getStreamPtr();
-    uint8_t buffer[1024];
+    uint8_t buffer[4096];  // ✅ Increased to 4KB for better performance
    size_t written = 0;
    size_t lastLoggedPercent = 0;
+    unsigned long lastYield = millis();
+    int loopsWithoutData = 0;

    while (http.connected() && written < (size_t)contentLength) {
        size_t available = stream->available();
        if (available) {
+            loopsWithoutData = 0;  // Reset counter when we have data
            size_t toRead = min(available, sizeof(buffer));
            size_t bytesRead = stream->readBytes(buffer, toRead);

            if (bytesRead > 0) {
+                // Write to SD card
                size_t bytesWritten = file.write(buffer, bytesRead);
+
+                // Check if write succeeded
                if (bytesWritten != bytesRead) {
-                    LOG_ERROR("SD write failed");
+                    LOG_ERROR("SD write failed at offset %u (%u/%u bytes written)", written, bytesWritten, bytesRead);
                    file.close();
+                    SDCardMutex::getInstance().unlock();
                    http.end();
+
+                    if (_timeKeeper) _timeKeeper->resumeClockUpdates();
+                    if (_telemetry) _telemetry->resume();
+
                    setStatus(Status::FAILED, ErrorCode::WRITE_FAILED);
                    return false;
                }
+
                written += bytesWritten;

-                // ✅ IMPROVED: Progress reporting with percentage
+                // Progress reporting
                notifyProgress(written, contentLength);

-                // Log progress every 10%
+                // Log progress every 20%
                size_t currentPercent = (written * 100) / contentLength;
-                if (currentPercent >= lastLoggedPercent + 10) {
+                if (currentPercent >= lastLoggedPercent + 20) {
                    LOG_INFO("OTA: Download progress: %u%% (%u/%u bytes)",
                             currentPercent, written, contentLength);
                    lastLoggedPercent = currentPercent;
                }
            }
+        } else {
+            // No data available - yield to prevent tight loop
+            loopsWithoutData++;
+            if (loopsWithoutData > 10) {
+                // If we've waited a while with no data, give longer yield
+                vTaskDelay(pdMS_TO_TICKS(1));  // 1ms delay
+                loopsWithoutData = 0;
            }
-        yield();
        }

+        // 🐕 Yield every 100ms to allow other tasks (including IDLE) to run
+        if (millis() - lastYield > 100) {
+            vTaskDelay(pdMS_TO_TICKS(1));  // Just 1ms is enough
+            lastYield = millis();
+        }
+    }
+
+    // 🔥 CRITICAL: Flush file buffer before closing to ensure all data is written
+    file.flush();
+    delay(100); // Brief delay to ensure SD card completes write
    file.close();
+
+    // 🔓 RELEASE SD CARD MUTEX - Other tasks can now access SD
+    SDCardMutex::getInstance().unlock();
+    LOG_INFO("OTA: SD card mutex released");
+
    http.end();

+    // ═══════════════════════════════════════════════════════════════════════════
+    // EXIT OTA FREEZE MODE - Resume all paused systems
+    // ═══════════════════════════════════════════════════════════════════════════
+    LOG_INFO("OTA: Exiting freeze mode - resuming TimeKeeper and Telemetry");
+
+    if (_timeKeeper) {
+        _timeKeeper->resumeClockUpdates();
+    }
+
+    if (_telemetry) {
+        _telemetry->resume();
+    }
+
    if (written != (size_t)contentLength) {
        LOG_ERROR("Download incomplete: %u/%d bytes", written, contentLength);
        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
@@ -476,7 +795,43 @@ bool OTAManager::downloadToSD(const String& url, const String& expectedChecksum,

    LOG_INFO("Download complete (%u bytes)", written);

-    // Verify checksum
+    // 🔒 Acquire mutex for file verification operations
+    if (!SDCardMutex::getInstance().lock(5000)) {
+        LOG_ERROR("OTA: Failed to acquire SD mutex for verification");
+        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
+        return false;
+    }
+
+    // 🔍 DEBUG: Check actual file size on SD card
+    size_t actualFileSize = _fileManager->getFileSize(tempPath);
+    LOG_INFO("OTA: File size on SD card: %u bytes (expected: %u)", actualFileSize, written);
+
+    if (actualFileSize != written) {
+        LOG_ERROR("OTA: FILE SIZE MISMATCH ON SD CARD! Expected %u, got %u", written, actualFileSize);
+        SDCardMutex::getInstance().unlock();
+        setStatus(Status::FAILED, ErrorCode::WRITE_FAILED);
+        return false;
+    }
+
+    // 🔍 DEBUG: Read first 32 bytes for inspection
+    File debugFile = SD.open(tempPath.c_str());
+    if (debugFile) {
+        uint8_t debugBuffer[32];
+        size_t debugRead = debugFile.readBytes((char*)debugBuffer, 32);
+        debugFile.close();
+
+        String hexDump = "OTA: First 32 bytes (hex): ";
+        for (size_t i = 0; i < debugRead && i < 32; i++) {
+            char hex[4];
+            sprintf(hex, "%02X ", debugBuffer[i]);
+            hexDump += hex;
+        }
+        LOG_INFO("%s", hexDump.c_str());
+    }
+
+    SDCardMutex::getInstance().unlock();  // Release before checksum (checksum will acquire its own)
+
+    // Verify checksum (verifyChecksum acquires its own mutex)
    if (!verifyChecksum(tempPath, expectedChecksum)) {
        LOG_ERROR("Checksum verification failed after download");
        _fileManager->deleteFile(tempPath);
@@ -510,9 +865,16 @@ bool OTAManager::verifyChecksum(const String& filePath, const String& expectedCh
 }

 String OTAManager::calculateSHA256(const String& filePath) {
+    // 🔒 Acquire SD mutex for file reading
+    if (!SDCardMutex::getInstance().lock(5000)) {
+        LOG_ERROR("Failed to acquire SD mutex for checksum calculation");
+        return "";
+    }
+
    File file = SD.open(filePath.c_str());
    if (!file) {
        LOG_ERROR("Failed to open file for checksum calculation: %s", filePath.c_str());
+        SDCardMutex::getInstance().unlock();
        return "";
    }

@@ -536,6 +898,9 @@ String OTAManager::calculateSHA256(const String& filePath) {

    file.close();

+    // 🔓 Release SD mutex
+    SDCardMutex::getInstance().unlock();
+
    // Convert to hex string
    String hashString = "";
    for (int i = 0; i < 32; i++) {
@@ -550,7 +915,17 @@ String OTAManager::calculateSHA256(const String& filePath) {
 }

 bool OTAManager::installFromSD(const String& filePath) {
+    // 🔒 Acquire SD mutex for file size check
+    if (!SDCardMutex::getInstance().lock(5000)) {
+        LOG_ERROR("Failed to acquire SD mutex for installation");
+        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
+        return false;
+    }
+
    size_t updateSize = _fileManager->getFileSize(filePath);
+
+    SDCardMutex::getInstance().unlock();  // Release after size check
+
    if (updateSize == 0) {
        LOG_ERROR("Empty update file");
        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
@@ -566,9 +941,17 @@ bool OTAManager::installFromSD(const String& filePath) {
        return false;
    }

+    // 🔒 Acquire SD mutex for file reading during flash
+    if (!SDCardMutex::getInstance().lock(30000)) {  // 30 second timeout for flash operation
+        LOG_ERROR("Failed to acquire SD mutex for firmware flash");
+        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
+        return false;
+    }
+
    File updateBin = SD.open(filePath.c_str());
    if (!updateBin) {
        LOG_ERROR("Failed to open update file: %s", filePath.c_str());
+        SDCardMutex::getInstance().unlock();
        setStatus(Status::FAILED, ErrorCode::DOWNLOAD_FAILED);
        return false;
    }
@@ -576,6 +959,9 @@ bool OTAManager::installFromSD(const String& filePath) {
    size_t written = Update.writeStream(updateBin);
    updateBin.close();

+    // 🔓 Release SD mutex after reading file
+    SDCardMutex::getInstance().unlock();
+    
    if (written == updateSize) {
        LOG_INFO("Update written successfully (%u bytes)", written);
    } else {
@@ -687,25 +1073,20 @@ bool OTAManager::performManualUpdate(const String& channel) {
        return false;
    }

-    LOG_INFO("Starting manual OTA update from %s channel via SD staging...", channel.c_str());
+    LOG_INFO("Starting manual OTA update from %s channel (direct-to-flash)...", channel.c_str());
    setStatus(Status::DOWNLOADING);

    String firmwareUrl = buildFirmwareUrl(channel);

-    // Download to SD first
-    if (!downloadToSD(firmwareUrl, _availableChecksum, _expectedFileSize)) {
-        return false;
-    }
-    
-    // Install from SD
-    return installFromSD("/firmware/staged_update.bin");
+    // Download directly to flash
+    return downloadDirectToFlash(firmwareUrl, _expectedFileSize);
 }

 // ════════════════════════════════════════════════════════════════════════════
 // CUSTOM FIRMWARE UPDATE
 // ════════════════════════════════════════════════════════════════════════════

-bool OTAManager::performCustomUpdate(const String& firmwareUrl, const String& checksum, size_t fileSize) {
+bool OTAManager::performCustomUpdate(const String& firmwareUrl, const String& checksum, size_t fileSize, uint16_t version) {
    if (_status != Status::IDLE) {
        LOG_WARNING("OTA update already in progress");
        return false;
@@ -718,29 +1099,33 @@ bool OTAManager::performCustomUpdate(const String& firmwareUrl, const String& ch
        return false;
    }

-    LOG_INFO("🔥 Starting CUSTOM firmware update...");
+    LOG_INFO("🔥 Starting CUSTOM firmware update (direct-to-flash)...");
    LOG_INFO("   URL: %s", firmwareUrl.c_str());
-    LOG_INFO("   Checksum: %s", checksum.isEmpty() ? "NOT PROVIDED" : checksum.c_str());
    LOG_INFO("   File Size: %u bytes", fileSize);

-    if (checksum.isEmpty()) {
-        LOG_WARNING("⚠️  No checksum provided - update will proceed without verification!");
+    if (!checksum.isEmpty()) {
+        LOG_INFO("   Checksum: %s (NOTE: ESP32 will validate after flash)", checksum.c_str());
+    }
+
+    if (version > 0) {
+        LOG_INFO("   Target Version: %u", version);
    }

    setStatus(Status::DOWNLOADING);

-    // Download firmware from custom URL to SD
-    if (!downloadToSD(firmwareUrl, checksum, fileSize)) {
-        LOG_ERROR("Custom firmware download failed");
-        return false;
-    }
-
-    LOG_INFO("✅ Custom firmware downloaded successfully");
-
-    // Install from SD
-    bool result = installFromSD("/firmware/staged_update.bin");
+    // Download directly to flash
+    bool result = downloadDirectToFlash(firmwareUrl, fileSize);

    if (result) {
+        // Update version in config if provided
+        if (version > 0) {
+            _configManager.setFwVersion(String(version));
+            _configManager.saveDeviceConfig();
+            LOG_INFO("✅ Custom firmware version %u saved to NVS", version);
+        } else {
+            LOG_WARNING("⚠️ No version provided - NVS version unchanged");
+        }
+
        LOG_INFO("🚀 Custom firmware installed - device will reboot");
    } else {
        LOG_ERROR("❌ Custom firmware installation failed");
@@ -866,3 +1251,49 @@ bool OTAManager::isHealthy() const {

    return true;
 }
+
+// ════════════════════════════════════════════════════════════════════════════
+// WORKER TASK IMPLEMENTATION
+// ════════════════════════════════════════════════════════════════════════════
+
+// Static entry point for worker task
+void OTAManager::otaWorkerTaskFunction(void* parameter) {
+    OTAManager* ota = static_cast<OTAManager*>(parameter);
+    LOG_INFO("🔧 OTA Worker task started on Core %d with 8KB stack", xPortGetCoreID());
+
+    // Run the worker loop
+    ota->otaWorkerLoop();
+
+    // Should not reach here
+    LOG_ERROR("❌ OTA Worker task ended unexpectedly!");
+    vTaskDelete(NULL);
+}
+
+// Worker task loop - waits for signals and performs OTA operations
+void OTAManager::otaWorkerLoop() {
+    while (true) {
+        // Wait for work signal (blocks until semaphore is given)
+        if (xSemaphoreTake(_otaWorkSignal, portMAX_DELAY) == pdTRUE) {
+            // Check what type of work to perform
+            switch (_pendingWork) {
+                case OTAWorkType::INITIAL_CHECK:
+                    LOG_INFO("🚀 Worker: Performing initial OTA check");
+                    performInitialCheck();
+                    break;
+
+                case OTAWorkType::SCHEDULED_CHECK:
+                    LOG_INFO("🕒 Worker: Performing scheduled emergency check");
+                    checkForEmergencyUpdates();
+                    break;
+
+                case OTAWorkType::NONE:
+                default:
+                    LOG_WARNING("⚠️ Worker: Received signal but no work pending");
+                    break;
+            }
+
+            // Clear pending work
+            _pendingWork = OTAWorkType::NONE;
+        }
+    }
+}
--- a/vesper/src/OTAManager/OTAManager.hpp
+++ b/vesper/src/OTAManager/OTAManager.hpp
@@ -26,9 +26,13 @@
 #include <functional>
 #include <time.h>
 #include "../FileManager/FileManager.hpp"
+#include "../Telemetry/Telemetry.hpp"
+#include "../TimeKeeper/TimeKeeper.hpp"

 class ConfigManager;  // Forward declaration
 class Player;         // Forward declaration for idle check
+class Timekeeper;     // Forward declaration for freeze mode
+class Telemetry;      // Forward declaration for freeze mode

 class OTAManager {
 public:
@@ -66,7 +70,9 @@ public:
    
    void begin();
    void setFileManager(FileManager* fm);
-    void setPlayer(Player* player);  // NEW: Set player reference for idle check
+    void setPlayer(Player* player);           // Set player reference for idle check
+    void setTimeKeeper(Timekeeper* tk);       // Set timekeeper reference for freeze mode
+    void setTelemetry(Telemetry* telemetry);  // Set telemetry reference for freeze mode
    
    void checkForUpdates();
    void checkForUpdates(const String& channel); // Check specific channel
@@ -77,7 +83,7 @@ public:
    void checkFirmwareUpdateFromSD();  // Check SD for firmware update
    bool performManualUpdate(); // Manual update triggered by app
    bool performManualUpdate(const String& channel); // Manual update from specific channel
-    bool performCustomUpdate(const String& firmwareUrl, const String& checksum = "", size_t fileSize = 0); // Custom firmware update
+    bool performCustomUpdate(const String& firmwareUrl, const String& checksum = "", size_t fileSize = 0, uint16_t version = 0); // Custom firmware update
    
    // Hardware identification
    String getHardwareVariant() const;
@@ -104,7 +110,9 @@ public:
 private:
    ConfigManager& _configManager;
    FileManager* _fileManager;
-    Player* _player;  // NEW: Player reference for idle check
+    Player* _player;           // Player reference for idle check
+    Timekeeper* _timeKeeper;   // TimeKeeper reference for freeze mode
+    Telemetry* _telemetry;     // Telemetry reference for freeze mode
    Status _status;
    ErrorCode _lastError;
    uint16_t _availableVersion;
@@ -128,6 +136,19 @@ private:
    static void initialCheckCallback(TimerHandle_t xTimer);
    void performInitialCheck();  // Async initial check after boot

+    // Worker task for OTA operations (prevents stack overflow in timer callbacks)
+    TaskHandle_t _otaWorkerTask;
+    SemaphoreHandle_t _otaWorkSignal;
+    static void otaWorkerTaskFunction(void* parameter);
+    void otaWorkerLoop();
+
+    enum class OTAWorkType {
+        NONE,
+        INITIAL_CHECK,
+        SCHEDULED_CHECK
+    };
+    OTAWorkType _pendingWork;
+    
    void setStatus(Status status, ErrorCode error = ErrorCode::NONE);
    void notifyProgress(size_t current, size_t total);
    bool checkVersion();
@@ -135,7 +156,8 @@ private:
    bool checkChannelsMetadata();
    bool downloadAndInstall();
    bool downloadAndInstall(const String& channel);
-    bool downloadToSD(const String& url, const String& expectedChecksum, size_t expectedSize);  // NEW: Added size param
+    bool downloadDirectToFlash(const String& url, size_t expectedSize);  // NEW: Direct to flash (bypasses SD)
+    bool downloadToSD(const String& url, const String& expectedChecksum, size_t expectedSize);  // OLD: Via SD card
    bool verifyChecksum(const String& filePath, const String& expectedChecksum);
    String calculateSHA256(const String& filePath);
    bool installFromSD(const String& filePath);
--- a/vesper/src/Player/Player.cpp
+++ b/vesper/src/Player/Player.cpp
@@ -2,6 +2,7 @@
 #include "../Communication/CommunicationRouter/CommunicationRouter.hpp"
 #include "../BellEngine/BellEngine.hpp"
 #include "../Telemetry/Telemetry.hpp"
+#include "../TimeKeeper/TimeKeeper.hpp"  // 🔥 Include for Timekeeper class definition
 #include "../BuiltInMelodies/BuiltInMelodies.hpp"

 // Note: Removed global melody_steps dependency for cleaner architecture
@@ -31,6 +32,7 @@ Player::Player(CommunicationRouter* comm, FileManager* fm)
    , _fileManager(fm)
    , _bellEngine(nullptr)
    , _telemetry(nullptr)
+    , _timekeeper(nullptr)
    , _durationTimerHandle(NULL) {
 }

@@ -59,6 +61,7 @@ Player::Player()
    , _fileManager(nullptr)
    , _bellEngine(nullptr)
    , _telemetry(nullptr)
+    , _timekeeper(nullptr)
    , _durationTimerHandle(NULL) {
 }

@@ -107,6 +110,12 @@ void Player::play() {
        return;
    }

+    // 🔥 CRITICAL: Interrupt any active clock alerts - user playback has priority!
+    if (_timekeeper) {
+        _timekeeper->interruptActiveAlert();
+        LOG_DEBUG("Player: Interrupted any active clock alerts");
+    }
+
    if (_bellEngine) {
        _bellEngine->setMelodyData(_melodySteps);
        _bellEngine->start();
@@ -228,9 +237,8 @@ void Player::setMelodyAttributes(JsonVariant doc) {
        continuous_loop = doc["continuous_loop"].as<bool>();
    }

-    if (continuous_loop && total_duration == 0) {
-        infinite_play = true;
-    }
+    // Recalculate infinite_play based on current values (reset first!)
+    infinite_play = (continuous_loop && total_duration == 0);

    if (!continuous_loop) {
        total_duration = segment_duration;
@@ -254,13 +262,6 @@ void Player::loadMelodyInRAM() {

        if (BuiltInMelodies::loadBuiltInMelody(uidStr, _melodySteps)) {
            LOG_INFO("✅ Built-in melody loaded successfully: %d steps", _melodySteps.size());
-
-            // Set default speed from built-in melody info
-            const BuiltInMelodies::MelodyInfo* melodyInfo = BuiltInMelodies::findMelodyByUID(uidStr);
-            if (melodyInfo && speed == 0) {
-                speed = melodyInfo->defaultSpeed;
-                LOG_DEBUG("Using default speed: %d ms/beat", speed);
-            }
            return;
        } else {
            LOG_ERROR("Failed to load built-in melody: %s", uidStr.c_str());
--- a/vesper/src/Player/Player.hpp
+++ b/vesper/src/Player/Player.hpp
@@ -133,6 +133,12 @@ public:
     */
    void setTelemetry(Telemetry* telemetry) { _telemetry = telemetry; }

+    /**
+     * @brief Set Timekeeper reference for alert coordination
+     * @param timekeeper Pointer to Timekeeper instance
+     */
+    void setTimekeeper(class Timekeeper* timekeeper) { _timekeeper = timekeeper; }
+    
    // ═══════════════════════════════════════════════════════════════════════════════
    // MELODY METADATA - Public access for compatibility
    // ═══════════════════════════════════════════════════════════════════════════════
@@ -249,6 +255,7 @@ private:
    FileManager* _fileManager;                      // 📁 File operations reference
    BellEngine* _bellEngine;                        // 🔥 High-precision timing engine reference
    Telemetry* _telemetry;                          // 📄 Telemetry system reference
+    class Timekeeper* _timekeeper;                  // ⏰ Timekeeper reference for alert coordination
    
    std::vector<uint16_t> _melodySteps;             // 🎵 Melody data owned by Player
    TimerHandle_t _durationTimerHandle = NULL;      // ⏱️ FreeRTOS timer (saves 4KB vs task!)
--- a/vesper/src/SDCardMutex/SDCardMutex.hpp
+++ b/vesper/src/SDCardMutex/SDCardMutex.hpp
@@ -0,0 +1,227 @@
+/*
+ * ═══════════════════════════════════════════════════════════════════════════════
+ * SDCARDMUTEX.HPP - Thread-Safe SD Card Access Manager
+ * ═══════════════════════════════════════════════════════════════════════════════
+ *
+ * 🔒 THE SD CARD CONCURRENCY GUARDIAN OF VESPER 🔒
+ *
+ * This singleton class provides thread-safe access to the SD card by managing
+ * a FreeRTOS mutex. All SD card operations MUST acquire this mutex to prevent
+ * concurrent access that can lead to file corruption and write failures.
+ *
+ * CRITICAL: The ESP32 SD library is NOT thread-safe. Without this mutex,
+ * simultaneous SD access from multiple FreeRTOS tasks will cause:
+ * - File corruption
+ * - Write failures
+ * - SD card "not recognized" errors
+ * - Random intermittent failures
+ *
+ * USAGE:
+ *
+ *   // Lock before ANY SD operation
+ *   if (SDCardMutex::getInstance().lock()) {
+ *       File file = SD.open("/myfile.txt", FILE_WRITE);
+ *       file.println("data");
+ *       file.close();
+ *       SDCardMutex::getInstance().unlock();
+ *   }
+ *
+ *   // Or use RAII helper for automatic unlock
+ *   {
+ *       SDCardLock lock;  // Acquires mutex
+ *       File file = SD.open("/myfile.txt", FILE_WRITE);
+ *       file.println("data");
+ *       file.close();
+ *   } // Automatically releases mutex when going out of scope
+ *
+ * 📋 VERSION: 1.0
+ * 📅 DATE: 2025-01-07
+ * 👨‍💻 AUTHOR: Advanced Bell Systems
+ * ═══════════════════════════════════════════════════════════════════════════════
+ */
+
+#pragma once
+
+#include <Arduino.h>
+#include <freertos/FreeRTOS.h>
+#include <freertos/semphr.h>
+#include "../Logging/Logging.hpp"
+
+/**
+ * @brief Singleton class for thread-safe SD card access
+ *
+ * Manages a global mutex that all SD card operations must acquire
+ * to prevent concurrent access from multiple FreeRTOS tasks.
+ */
+class SDCardMutex {
+public:
+    /**
+     * @brief Get the singleton instance
+     * @return Reference to the singleton instance
+     */
+    static SDCardMutex& getInstance() {
+        static SDCardMutex instance;
+        return instance;
+    }
+
+    /**
+     * @brief Initialize the mutex (call once during setup)
+     * @return true if initialization succeeded, false otherwise
+     */
+    bool begin() {
+        if (_mutex != NULL) {
+            LOG_WARNING("SDCardMutex already initialized");
+            return true;
+        }
+
+        _mutex = xSemaphoreCreateMutex();
+
+        if (_mutex == NULL) {
+            LOG_ERROR("Failed to create SD card mutex!");
+            return false;
+        }
+
+        LOG_INFO("SD card mutex initialized");
+        return true;
+    }
+
+    /**
+     * @brief Acquire the SD card mutex
+     * @param timeoutMs Maximum time to wait for mutex (default: 5 seconds)
+     * @return true if mutex acquired, false if timeout
+     */
+    bool lock(uint32_t timeoutMs = 5000) {
+        if (_mutex == NULL) {
+            LOG_ERROR("SDCardMutex not initialized!");
+            return false;
+        }
+
+        TickType_t timeout = (timeoutMs == portMAX_DELAY)
+            ? portMAX_DELAY
+            : pdMS_TO_TICKS(timeoutMs);
+
+        if (xSemaphoreTake(_mutex, timeout) == pdTRUE) {
+            _lockCount++;
+            return true;
+        } else {
+            LOG_ERROR("SD card mutex timeout after %u ms!", timeoutMs);
+            return false;
+        }
+    }
+
+    /**
+     * @brief Release the SD card mutex
+     */
+    void unlock() {
+        if (_mutex == NULL) {
+            LOG_ERROR("SDCardMutex not initialized!");
+            return;
+        }
+
+        xSemaphoreGive(_mutex);
+        _unlockCount++;
+    }
+
+    /**
+     * @brief Get mutex lock statistics
+     * @param locks Reference to store lock count
+     * @param unlocks Reference to store unlock count
+     */
+    void getStats(uint32_t& locks, uint32_t& unlocks) const {
+        locks = _lockCount;
+        unlocks = _unlockCount;
+    }
+
+    /**
+     * @brief Check if mutex is currently locked by THIS task
+     * @return true if current task holds the mutex
+     */
+    bool isLockedByMe() const {
+        if (_mutex == NULL) {
+            return false;
+        }
+        return xSemaphoreGetMutexHolder(_mutex) == xTaskGetCurrentTaskHandle();
+    }
+
+    // Delete copy constructor and assignment operator (singleton)
+    SDCardMutex(const SDCardMutex&) = delete;
+    SDCardMutex& operator=(const SDCardMutex&) = delete;
+
+private:
+    SDCardMutex()
+        : _mutex(NULL)
+        , _lockCount(0)
+        , _unlockCount(0) {
+    }
+
+    ~SDCardMutex() {
+        if (_mutex != NULL) {
+            vSemaphoreDelete(_mutex);
+            _mutex = NULL;
+        }
+    }
+
+    SemaphoreHandle_t _mutex;
+    uint32_t _lockCount;
+    uint32_t _unlockCount;
+};
+
+/**
+ * @brief RAII helper class for automatic mutex lock/unlock
+ *
+ * Acquires SD card mutex on construction and releases on destruction.
+ * Use this for automatic cleanup when going out of scope.
+ *
+ * Example:
+ *   {
+ *       SDCardLock lock;
+ *       File file = SD.open("/test.txt", FILE_WRITE);
+ *       file.println("data");
+ *       file.close();
+ *   } // Mutex automatically released here
+ */
+class SDCardLock {
+public:
+    /**
+     * @brief Constructor - acquires mutex
+     * @param timeoutMs Maximum time to wait for mutex
+     */
+    explicit SDCardLock(uint32_t timeoutMs = 5000)
+        : _locked(false) {
+        _locked = SDCardMutex::getInstance().lock(timeoutMs);
+        if (!_locked) {
+            LOG_ERROR("SDCardLock failed to acquire mutex!");
+        }
+    }
+
+    /**
+     * @brief Destructor - releases mutex
+     */
+    ~SDCardLock() {
+        if (_locked) {
+            SDCardMutex::getInstance().unlock();
+        }
+    }
+
+    /**
+     * @brief Check if lock was successfully acquired
+     * @return true if mutex is locked
+     */
+    bool isLocked() const {
+        return _locked;
+    }
+
+    /**
+     * @brief Explicit conversion to bool for easy checking
+     */
+    explicit operator bool() const {
+        return _locked;
+    }
+
+    // Delete copy constructor and assignment operator
+    SDCardLock(const SDCardLock&) = delete;
+    SDCardLock& operator=(const SDCardLock&) = delete;
+
+private:
+    bool _locked;
+};
--- a/vesper/src/Telemetry/Telemetry.cpp
+++ b/vesper/src/Telemetry/Telemetry.cpp
@@ -172,6 +172,8 @@ void Telemetry::telemetryTask(void* parameter) {
    LOG_INFO("Telemetry task started");

    while(1) {
+        // Skip processing if paused (OTA freeze mode)
+        if (!telemetry->isPaused) {
            // Only run if player is playing OR we're still cooling
            bool isPlaying = (telemetry->playerIsPlayingPtr != nullptr) ?
                            *(telemetry->playerIsPlayingPtr) : false;
@@ -179,6 +181,7 @@ void Telemetry::telemetryTask(void* parameter) {
            if (isPlaying || telemetry->coolingActive) {
                telemetry->checkBellLoads();
            }
+        }

        vTaskDelay(pdMS_TO_TICKS(1000)); // Run every 1s
    }
--- a/vesper/src/Telemetry/Telemetry.hpp
+++ b/vesper/src/Telemetry/Telemetry.hpp
@@ -77,6 +77,9 @@ private:
    // Spinlock for critical sections
    portMUX_TYPE telemetrySpinlock = portMUX_INITIALIZER_UNLOCKED;

+    // Pause flag for OTA freeze mode
+    volatile bool isPaused = false;
+
 public:
    // Initialization
    void begin();
@@ -109,6 +112,10 @@ public:
    // Force stop callback (to be set by main application)
    void setForceStopCallback(void (*callback)());

+    // Pause/Resume for OTA freeze mode (stops SD writes during firmware update)
+    void pause() { isPaused = true; }
+    void resume() { isPaused = false; }
+    
    // ═══════════════════════════════════════════════════════════════════════════════
    // HEALTH CHECK METHOD
    // ═══════════════════════════════════════════════════════════════════════════════
--- a/vesper/src/TimeKeeper/TimeKeeper.cpp
+++ b/vesper/src/TimeKeeper/TimeKeeper.cpp
@@ -2,6 +2,7 @@
 #include "../OutputManager/OutputManager.hpp"
 #include "../ConfigManager/ConfigManager.hpp"
 #include "../Networking/Networking.hpp"
+#include "../Player/Player.hpp"  // 🔥 Include for Player class definition
 #include "SD.h"
 #include <time.h>

@@ -47,6 +48,19 @@ void Timekeeper::setNetworking(Networking* networking) {
    LOG_INFO("Timekeeper connected to Networking");
 }

+void Timekeeper::setPlayer(Player* player) {
+    _player = player;
+    LOG_INFO("Timekeeper connected to Player for playback coordination");
+}
+
+void Timekeeper::interruptActiveAlert() {
+    if (alertInProgress.load()) {
+        LOG_INFO("⚡ ALERT INTERRUPTED by user playback - marking as complete");
+        alertInProgress.store(false);
+        // Alert will stop naturally on next check in fireAlertBell loop
+    }
+}
+
 void Timekeeper::setRelayWriteFunction(void (*func)(int, int)) {
    relayWriteFunc = func;
    LOG_WARNING("Using LEGACY relay function - consider upgrading to OutputManager");
@@ -152,9 +166,9 @@ void Timekeeper::syncTimeWithNTP() {
    // Configure NTP with settings from config
    configTime(timeConfig.gmtOffsetSec, timeConfig.daylightOffsetSec, timeConfig.ntpServer.c_str());

-    // 🔥 NON-BLOCKING: Try to get time immediately without waiting
+    // 🔥 NON-BLOCKING: Try to get time with reasonable timeout for network response
    struct tm timeInfo;
-    if (getLocalTime(&timeInfo, 100)) {  // 100ms timeout instead of blocking
+    if (getLocalTime(&timeInfo, 5000)) {  // 5 second timeout for NTP response
        // Success! Update RTC with synchronized time
        rtc.adjust(DateTime(timeInfo.tm_year + 1900, timeInfo.tm_mon + 1, timeInfo.tm_mday,
                            timeInfo.tm_hour, timeInfo.tm_min, timeInfo.tm_sec));
@@ -538,14 +552,34 @@ void Timekeeper::checkClockAlerts() {
        return;
    }

+    // 🔥 CRITICAL: Check if Player is busy - if so, SKIP alert completely
+    if (_player && _player->isPlaying) {
+        // Player is active (playing, paused, stopping, etc.) - skip alert entirely
+        // Mark this alert as processed to prevent it from firing when playback ends
+        DateTime now = rtc.now();
+        int currentMinute = now.minute();
+
+        if (currentMinute == 0) {
+            lastHour = now.hour();  // Mark hour as processed
+        } else if (currentMinute == 30) {
+            lastMinute = 30;  // Mark half-hour as processed
+        } else if (currentMinute == 15 || currentMinute == 45) {
+            lastMinute = currentMinute;  // Mark quarter-hour as processed
+        }
+
+        LOG_DEBUG("⏭️ SKIPPING clock alert - Player is busy (playing/paused)");
+        return;
+    }
+
    // Get current time
    DateTime now = rtc.now();
    int currentHour = now.hour();
    int currentMinute = now.minute();
    int currentSecond = now.second();

-    // Only trigger alerts on exact seconds (0-2) to avoid multiple triggers
-    if (currentSecond > 2) {
+    // Only trigger alerts in first 30 seconds of the minute
+    // The lastHour/lastMinute tracking prevents duplicate triggers
+    if (currentSecond > 30) {
        return;
    }

@@ -625,7 +659,16 @@ void Timekeeper::fireAlertBell(uint8_t bellNumber, int count) {

    const auto& clockConfig = _configManager->getClockConfig();

+    // Mark alert as in progress
+    alertInProgress.store(true);
+
    for (int i = 0; i < count; i++) {
+        // 🔥 Check for interruption by user playback
+        if (!alertInProgress.load()) {
+            LOG_INFO("⚡ Alert interrupted at ring %d/%d - stopping immediately", i + 1, count);
+            return;
+        }
+
        // Get bell duration from bell configuration
        uint16_t bellDuration = _configManager->getBellDuration(bellNumber);

@@ -640,6 +683,9 @@ void Timekeeper::fireAlertBell(uint8_t bellNumber, int count) {
            vTaskDelay(pdMS_TO_TICKS(clockConfig.alertRingInterval));
        }
    }
+
+    // Mark alert as complete
+    alertInProgress.store(false);
 }

 void Timekeeper::checkBacklightAutomation() {
@@ -697,14 +743,22 @@ bool Timekeeper::isInSilencePeriod() {

    // Check daytime silence period
    if (clockConfig.daytimeSilenceEnabled) {
-        if (isTimeInRange(currentTime, clockConfig.daytimeSilenceOnTime, clockConfig.daytimeSilenceOffTime)) {
+        bool inDaytime = isTimeInRange(currentTime, clockConfig.daytimeSilenceOnTime, clockConfig.daytimeSilenceOffTime);
+        LOG_DEBUG("🔇 Daytime silence check: current=%s, range=%s-%s, inRange=%s",
+                  currentTime.c_str(), clockConfig.daytimeSilenceOnTime.c_str(),
+                  clockConfig.daytimeSilenceOffTime.c_str(), inDaytime ? "YES" : "NO");
+        if (inDaytime) {
            return true;
        }
    }

    // Check nighttime silence period
    if (clockConfig.nighttimeSilenceEnabled) {
-        if (isTimeInRange(currentTime, clockConfig.nighttimeSilenceOnTime, clockConfig.nighttimeSilenceOffTime)) {
+        bool inNighttime = isTimeInRange(currentTime, clockConfig.nighttimeSilenceOnTime, clockConfig.nighttimeSilenceOffTime);
+        LOG_DEBUG("🌙 Nighttime silence check: current=%s, range=%s-%s, inRange=%s",
+                  currentTime.c_str(), clockConfig.nighttimeSilenceOnTime.c_str(),
+                  clockConfig.nighttimeSilenceOffTime.c_str(), inNighttime ? "YES" : "NO");
+        if (inNighttime) {
            return true;
        }
    }
--- a/vesper/src/TimeKeeper/TimeKeeper.hpp
+++ b/vesper/src/TimeKeeper/TimeKeeper.hpp
@@ -28,6 +28,7 @@
 #include <Arduino.h>
 #include <vector>
 #include <algorithm>
+#include <atomic>
 #include <ArduinoJson.h>
 #include <RTClib.h>
 #include "freertos/FreeRTOS.h"
@@ -61,6 +62,7 @@ private:
    // Alert management - new functionality
    int lastHour = -1;      // Track last processed hour to avoid duplicate alerts
    int lastMinute = -1;    // Track last processed minute for quarter/half alerts
+    std::atomic<bool> alertInProgress{false};  // Flag to track if alert is currently playing

    // Backlight management - new functionality
    bool backlightState = false;  // Track current backlight state
@@ -69,6 +71,7 @@ private:
    OutputManager* _outputManager = nullptr;
    ConfigManager* _configManager = nullptr;
    Networking* _networking = nullptr;
+    class Player* _player = nullptr;  // Reference to Player for playback status checks

    // Legacy function pointer (DEPRECATED - will be removed)
    void (*relayWriteFunc)(int relay, int state) = nullptr;
@@ -84,12 +87,16 @@ public:
    void setOutputManager(OutputManager* outputManager);
    void setConfigManager(ConfigManager* configManager);
    void setNetworking(Networking* networking);
+    void setPlayer(class Player* player);  // Set Player reference for playback coordination

    // Clock Updates Pause Functions
    void pauseClockUpdates() { clockUpdatesPaused = true; }
    void resumeClockUpdates() { clockUpdatesPaused = false; }
    bool areClockUpdatesPaused() const { return clockUpdatesPaused; }

+    // Alert interruption - called by Player when starting playback
+    void interruptActiveAlert();
+
    // Legacy interface (DEPRECATED - will be removed)
    void setRelayWriteFunction(void (*func)(int, int));

--- a/vesper/vesper.ino
+++ b/vesper/vesper.ino
@@ -64,19 +64,23 @@
 * 👨‍💻 AUTHOR: BellSystems bonamin
 */

-#define FW_VERSION "137"
+#define FW_VERSION "154"


 /*
 * ═══════════════════════════════════════════════════════════════════════════════
 * 📅 VERSION HISTORY:
+ * 	NOTE: Versions are now stored as integers (v1.3 = 130)
 * ═══════════════════════════════════════════════════════════════════════════════
 * v0.1  (100)  - Vesper Launch Beta
 * v1.2  (120) - Added Log Level Configuration via App/MQTT
 * v1.3  (130) - Added Telemetry Reports to App, Various Playback Fixes
 * v137 - Made OTA and MQTT delays Async
- * ═══════════════════════════════════════════════════════════════════════════════
- * NOTE: Versions are now stored as integers (v1.3 = 130)
+ * v138 - Removed Ethernet, added default WiFi creds (Mikrotik AP) and fixed various Clock issues
+ * v140 - Changed FW Updates to Direct-to-Flash and added manual update functionality with version check
+ * v151 - Fixed Clock Alerts not running properly
+ * v152 - Fix RTC Time Reports, added sync_time_to_LCD functionality
+ * v153 - Fix Infinite Loop Bug and Melody Download crashes.
 * ═══════════════════════════════════════════════════════════════════════════════
 */

@@ -122,6 +126,7 @@
 // ═══════════════════════════════════════════════════════════════════════════════════
 // CUSTOM CLASSES - Include Custom Classes and Functions
 // ═══════════════════════════════════════════════════════════════════════════════════
+#include "src/SDCardMutex/SDCardMutex.hpp"  // ⚠️ MUST be included before any SD-using classes
 #include "src/ConfigManager/ConfigManager.hpp"
 #include "src/FileManager/FileManager.hpp"
 #include "src/TimeKeeper/TimeKeeper.hpp"
@@ -183,6 +188,7 @@ BellEngine bellEngine(player, configManager, telemetry, outputManager); // 🔥

 TaskHandle_t bellEngineHandle = NULL; // Legacy - will be removed
 TimerHandle_t schedulerTimer;
+TimerHandle_t ntpSyncTimer; // Non-blocking delayed NTP sync timer



@@ -193,6 +199,14 @@ void handleFactoryReset() {
    }
 }

+// Non-blocking NTP sync timer callback
+void ntpSyncTimerCallback(TimerHandle_t xTimer) {
+    LOG_DEBUG("Network stabilization complete - starting NTP sync");
+    if (!networking.isInAPMode()) {
+        timekeeper.syncTimeWithNTP();
+    }
+}
+


 void setup()
@@ -206,6 +220,15 @@ void setup()
 	SPI.begin(hwConfig.ethSpiSck, hwConfig.ethSpiMiso, hwConfig.ethSpiMosi);
  delay(50);

+	// 🔒 CRITICAL: Initialize SD Card Mutex BEFORE any SD operations
+	// This prevents concurrent SD access from multiple FreeRTOS tasks
+	if (!SDCardMutex::getInstance().begin()) {
+		Serial.println("❌ FATAL: Failed to initialize SD card mutex!");
+		Serial.println("   System cannot continue safely - entering infinite loop");
+		while(1) { delay(1000); }  // Halt system - unsafe to proceed
+	}
+	Serial.println("✅ SD card mutex initialized");
+
 	// Initialize Configuration (loads factory identity from NVS + user settings from SD)
 	configManager.begin();
 	
@@ -296,6 +319,7 @@ void setup()
 	 timekeeper.setOutputManager(&outputManager);
 	 timekeeper.setConfigManager(&configManager);
 	 timekeeper.setNetworking(&networking);
+	 timekeeper.setPlayer(&player);  // 🔥 Connect for playback coordination
 	 // Clock outputs now configured via ConfigManager/Communication commands

 	// Register TimeKeeper with health monitor
@@ -337,6 +361,7 @@ void setup()
 	player.setDependencies(&communication, &fileManager);
 	player.setBellEngine(&bellEngine); // Connect the beast!
 	player.setTelemetry(&telemetry);
+	player.setTimekeeper(&timekeeper);  // 🔥 Connect for alert coordination

 	// Register Communication with health monitor
 	healthMonitor.setCommunication(&communication);
@@ -347,15 +372,25 @@ void setup()
 	// Track if AsyncWebServer has been started to prevent duplicates
 	static bool webServerStarted = false;

+	// Create NTP sync timer (one-shot, 3 second delay for network stabilization)
+	ntpSyncTimer = xTimerCreate(
+		"NTPSync",                    // Timer name
+		pdMS_TO_TICKS(3000),          // 3 second delay (network stabilization)
+		pdFALSE,                      // One-shot timer (not auto-reload)
+		NULL,                         // Timer ID (not used)
+		ntpSyncTimerCallback          // Callback function
+	);
+
 	// Set up network callbacks
 	networking.setNetworkCallbacks(
 		[&webServerStarted]() {
 			communication.onNetworkConnected();

-			// Non-blocking NTP sync (graceful without internet)
+			// Schedule non-blocking NTP sync after 3s network stabilization (like MQTT)
 			// Skip NTP sync in AP mode (no internet connection)
-			if (!networking.isInAPMode()) {
-				timekeeper.syncTimeWithNTP();
+			if (!networking.isInAPMode() && ntpSyncTimer) {
+				LOG_DEBUG("Network connected - scheduling NTP sync after 3s stabilization (non-blocking)");
+				xTimerStart(ntpSyncTimer, 0);
 			}

 			// Start AsyncWebServer when network becomes available (only once!)
@@ -374,10 +409,11 @@ void setup()
 		LOG_INFO("Network already connected - initializing services");
 		communication.onNetworkConnected();

-		// Non-blocking NTP sync (graceful without internet)
+		// Schedule non-blocking NTP sync after 3s network stabilization (like MQTT)
 		// Skip NTP sync in AP mode (no internet connection)
-		if (!networking.isInAPMode()) {
-			timekeeper.syncTimeWithNTP();
+		if (!networking.isInAPMode() && ntpSyncTimer) {
+			LOG_DEBUG("Network already connected - scheduling NTP sync after 3s stabilization (non-blocking)");
+			xTimerStart(ntpSyncTimer, 0);
 		}

 		// 🔥 CRITICAL: Start AsyncWebServer ONLY when network is ready
@@ -396,6 +432,8 @@ void setup()
 	otaManager.begin();
 	otaManager.setFileManager(&fileManager);
 	otaManager.setPlayer(&player);         // Set player reference for idle check
+	otaManager.setTimeKeeper(&timekeeper); // Set timekeeper reference for freeze mode
+	otaManager.setTelemetry(&telemetry);   // Set telemetry reference for freeze mode

 	// 🔥 FIX: OTA check will happen asynchronously via scheduled timer (no blocking delay)
 	// UDP discovery setup can happen immediately without conflicts
@@ -477,6 +515,9 @@ void loop()
 		lastWsCleanup = millis();
 	}

+	// Process UART command input from external devices (LCD panel, buttons)
+	communication.loop();
+
 	// 🔥 DEBUG: Log every 10 seconds to verify we're still running
 	static unsigned long lastLog = 0;
 	if (millis() - lastLog > 10000) {
Author	SHA1	Message	Date
bonamin	c656835d8e	Fix LCD Communicaiton infinite looping upon failed commands	2026-02-10 18:45:41 +02:00
bonamin	980de08584	Fix Infinite Loop Bug, Melody Download crashes and dwnld skip if melody is builin.	2026-02-04 17:00:27 +02:00
bonamin	9c314d88cf	Fixed Infinite Play bug When Infinite Play was set once, it was never reset.	2026-02-03 15:46:47 +02:00
bonamin	53c55d2726	Added Sync Time to LCD, Fixed UTC Timestamp issues	2026-01-28 10:28:05 +02:00
bonamin	094b1a9620	Added UART as a communication interface option.	2026-01-19 21:24:35 +02:00
bonamin	11b98166d1	Fixed OTA problems, Clock Alerts and MQTT Logs. V151	2026-01-19 19:02:25 +02:00
bonamin	7e279c6e45	Added delay to NTP to let WiFi catch up before time request	2026-01-07 21:46:26 +02:00
bonamin	eb6e0f0e5c	Added Global Mutex for SD IOPS, and changed OTA to write directly to Flash	2026-01-07 21:04:33 +02:00
bonamin	7adc1fec34	Changed OTA to write Directly to flash	2026-01-07 15:46:20 +02:00
bonamin	51b7722e1d	Removed Ethernet, added default WiFi (mikrotik AP) and fixed various Clock bugs.	2026-01-07 01:06:45 +02:00