Added MQTT Heartbeat and changed Firware Versioning System

vesper/HEARTBEAT_FEATURE.md

@@ -0,0 +1,139 @@
+# 💓 MQTT Heartbeat Feature
+
+## Overview
+Implemented a **retained MQTT heartbeat** system that sends periodic status updates every 30 seconds when the controller is connected to MQTT.
+
+## What It Does
+
+### Heartbeat Message
+Every 30 seconds, the controller publishes a **retained** message to:
+```
+vesper/{deviceID}/status/heartbeat
+```
+
+### Message Format
+```json
+{
+  "status": "INFO",
+  "type": "heartbeat",
+  "payload": {
+    "device_id": "VESPER-ABC123",
+    "firmware_version": "130",
+    "timestamp": "Uptime: 5h 23m 45s",
+    "ip_address": "192.168.1.100",
+    "gateway": "192.168.1.1",
+    "uptime_ms": 19425000
+  }
+}
+```
+
+### Key Features
+✅ **Retained Message** - Only the LAST heartbeat stays on the broker  
+✅ **Auto-Start** - Begins when MQTT connects  
+✅ **Auto-Stop** - Stops when MQTT disconnects  
+✅ **30-Second Interval** - Periodic updates  
+✅ **First Beat Immediate** - Sends first heartbeat right after connecting  
+✅ **QoS 1** - Reliable delivery  
+
+## Why This is Awesome
+
+### For Your Flutter App
+1. **Immediate Status** - Any new connection gets the last known status instantly
+2. **Stale Detection** - Can detect if controller went offline (timestamp too old)
+3. **Device Discovery** - Apps can subscribe to `vesper/+/status/heartbeat` to find all controllers
+4. **No Polling** - Just subscribe once and get automatic updates
+
+### Example App Logic
+```dart
+// Subscribe to heartbeat
+mqtt.subscribe('vesper/DEVICE-123/status/heartbeat');
+
+// On message received
+if (heartbeat.uptime_ms > lastSeen.uptime_ms + 120000) {
+  // No heartbeat for 2+ minutes = controller offline
+  showOfflineWarning();
+}
+```
+
+## Implementation Details
+
+### Files Modified
+1. **MQTTAsyncClient.hpp** - Added heartbeat timer and methods
+2. **MQTTAsyncClient.cpp** - Implemented heartbeat logic
+3. **Networking.hpp** - Added `getGateway()` method
+4. **Networking.cpp** - Implemented `getGateway()` method
+
+### New Methods Added
+```cpp
+void startHeartbeat();           // Start 30s periodic timer
+void stopHeartbeat();            // Stop timer
+void publishHeartbeat();         // Build and publish message
+void heartbeatTimerCallback();   // Timer callback handler
+```
+
+### Timer Configuration
+- **Type**: FreeRTOS Software Timer
+- **Mode**: Auto-reload (repeating)
+- **Period**: 30,000 ms (30 seconds)
+- **Core**: Runs on Core 0 (MQTT task core)
+
+## Testing
+
+### How to Test
+1. Flash the firmware
+2. Subscribe to the heartbeat topic:
+   ```bash
+   mosquitto_sub -h YOUR_BROKER -t "vesper/+/status/heartbeat" -v
+   ```
+3. You should see heartbeats every 30 seconds
+4. Disconnect the controller - the last message stays retained
+5. Reconnect - you'll immediately see the last retained message, then new ones every 30s
+
+### Expected Serial Output
+```
+💓 Starting MQTT heartbeat (every 30 seconds)
+💓 Published heartbeat (retained) - IP: 192.168.1.100, Uptime: 45000ms
+💓 Published heartbeat (retained) - IP: 192.168.1.100, Uptime: 75000ms
+❤️ Stopped MQTT heartbeat  (when MQTT disconnects)
+```
+
+## Future Enhancements (Optional)
+
+### Possible Additions:
+- Add actual RTC timestamp (instead of just uptime)
+- Add WiFi signal strength (RSSI) for WiFi connections
+- Add free heap memory
+- Add current playback status
+- Add bell configuration version/hash
+
+### Implementation Example:
+```cpp
+// In publishHeartbeat()
+payload["rssi"] = WiFi.RSSI();  // WiFi signal strength
+payload["free_heap"] = ESP.getFreeHeap();
+payload["playback_active"] = player.isPlaying;
+```
+
+## Configuration
+
+### Current Settings (can be changed in MQTTAsyncClient.hpp):
+```cpp
+static const unsigned long HEARTBEAT_INTERVAL = 30000;  // 30 seconds
+```
+
+To change interval to 60 seconds:
+```cpp
+static const unsigned long HEARTBEAT_INTERVAL = 60000;  // 60 seconds
+```
+
+## Notes
+- Message is published with **QoS 1** (at least once delivery)
+- Message is **retained** (broker keeps last message)
+- Timer starts automatically when MQTT connects
+- Timer stops automatically when MQTT disconnects
+- First heartbeat is sent immediately upon connection (no 30s wait)
+
+---
+**Feature Implemented**: January 2025  
+**Version**: Firmware v130+  
+**Status**: ✅ Production Ready

vesper/src/Communication/MQTTAsyncClient/MQTTAsyncClient.cpp

@@ -13,7 +13,8 @@ MQTTAsyncClient::MQTTAsyncClient(ConfigManager& configManager, Networking& netwo
     : _configManager(configManager)
     , _networking(networking)
     , _messageCallback(nullptr) 
-    , _mqttReconnectTimer(nullptr) {
+    , _mqttReconnectTimer(nullptr)
+    , _heartbeatTimer(nullptr) {
 
     _instance = this;                               // Set static instance pointer
 
@@ -25,6 +26,15 @@ MQTTAsyncClient::MQTTAsyncClient(ConfigManager& configManager, Networking& netwo
         (void*)0,                                   // Timer ID (can store data)
         mqttReconnectTimerCallback                  // Callback function when timer expires
     );
+    
+    // Create heartbeat timer (auto-reload every 30 seconds)
+    _heartbeatTimer = xTimerCreate(
+        "mqttHeartbeat",                            // Timer name
+        pdMS_TO_TICKS(HEARTBEAT_INTERVAL),          // Period: 30000ms = 30 seconds
+        pdTRUE,                                     // Auto-reload (true) - repeating timer
+        (void*)0,                                   // Timer ID
+        heartbeatTimerCallback                      // Callback function
+    );
 
 }
 
@@ -32,6 +42,10 @@ MQTTAsyncClient::~MQTTAsyncClient() {
     if (_mqttReconnectTimer) {
         xTimerDelete(_mqttReconnectTimer, portMAX_DELAY);
     }
+    if (_heartbeatTimer) {
+        xTimerStop(_heartbeatTimer, 0);
+        xTimerDelete(_heartbeatTimer, portMAX_DELAY);
+    }
     _mqttClient.disconnect();
 }
 
@@ -155,6 +169,9 @@ void MQTTAsyncClient::onMqttConnect(bool sessionPresent) {
     
     // Subscribe to control topic
     subscribe();
+    
+    // 🔥 Start heartbeat timer
+    startHeartbeat();
 }
 
 void MQTTAsyncClient::onMqttDisconnect(AsyncMqttClientDisconnectReason reason) {
@@ -184,6 +201,9 @@ void MQTTAsyncClient::onMqttDisconnect(AsyncMqttClientDisconnectReason reason) {
     }
     
     LOG_ERROR("❌ Disconnected from MQTT broker - Reason: %s (%d)", reasonStr, static_cast<int>(reason));
+    
+    // Stop heartbeat timer when disconnected
+    stopHeartbeat();
 
      if (_networking.isConnected()) {
         LOG_INFO("Network still connected - scheduling MQTT reconnection in %d seconds", MQTT_RECONNECT_DELAY / 1000);
@@ -237,4 +257,89 @@ void MQTTAsyncClient::mqttReconnectTimerCallback(TimerHandle_t xTimer) {
     if (MQTTAsyncClient::_instance) {
         MQTTAsyncClient::_instance->attemptReconnection();
     }
+}
+
+// ═══════════════════════════════════════════════════════════════════════════════════
+// HEARTBEAT FUNCTIONALITY
+// ═══════════════════════════════════════════════════════════════════════════════════
+
+void MQTTAsyncClient::startHeartbeat() {
+    if (_heartbeatTimer) {
+        LOG_INFO("💓 Starting MQTT heartbeat (every %d seconds)", HEARTBEAT_INTERVAL / 1000);
+        
+        // Publish first heartbeat immediately
+        publishHeartbeat();
+        
+        // Start periodic timer
+        xTimerStart(_heartbeatTimer, 0);
+    }
+}
+
+void MQTTAsyncClient::stopHeartbeat() {
+    if (_heartbeatTimer) {
+        xTimerStop(_heartbeatTimer, 0);
+        LOG_INFO("❤️ Stopped MQTT heartbeat");
+    }
+}
+
+void MQTTAsyncClient::publishHeartbeat() {
+    if (!_mqttClient.connected()) {
+        LOG_WARNING("⚠️ Cannot publish heartbeat - MQTT not connected");
+        return;
+    }
+    
+    // Build heartbeat JSON message
+    StaticJsonDocument<512> doc;
+    doc["status"] = "INFO";
+    doc["type"] = "heartbeat";
+    
+    JsonObject payload = doc.createNestedObject("payload");
+    
+    // Device ID from NVS
+    payload["device_id"] = _configManager.getDeviceUID();
+    
+    // Firmware version
+    payload["firmware_version"] = _configManager.getFwVersion();
+    
+    // Current date/time (from TimeKeeper if available, else uptime-based)
+    // For now, we'll use a simple timestamp format
+    unsigned long uptimeMs = millis();
+    unsigned long uptimeSec = uptimeMs / 1000;
+    unsigned long hours = uptimeSec / 3600;
+    unsigned long minutes = (uptimeSec % 3600) / 60;
+    unsigned long seconds = uptimeSec % 60;
+    
+    char timestampStr[64];
+    snprintf(timestampStr, sizeof(timestampStr), "Uptime: %luh %lum %lus", hours, minutes, seconds);
+    payload["timestamp"] = timestampStr;
+    
+    // IP address
+    payload["ip_address"] = _networking.getLocalIP();
+    
+    // Gateway address
+    payload["gateway"] = _networking.getGateway();
+    
+    // Uptime in milliseconds
+    payload["uptime_ms"] = uptimeMs;
+    
+    // Serialize to string
+    String heartbeatMessage;
+    serializeJson(doc, heartbeatMessage);
+    
+    // Publish to heartbeat topic with RETAIN flag
+    String heartbeatTopic = "vesper/" + _configManager.getDeviceUID() + "/status/heartbeat";
+    uint16_t packetId = _mqttClient.publish(heartbeatTopic.c_str(), 1, true, heartbeatMessage.c_str());
+    
+    if (packetId > 0) {
+        LOG_DEBUG("💓 Published heartbeat (retained) - IP: %s, Uptime: %lums", 
+                 _networking.getLocalIP().c_str(), uptimeMs);
+    } else {
+        LOG_ERROR("❌ Failed to publish heartbeat");
+    }
+}
+
+void MQTTAsyncClient::heartbeatTimerCallback(TimerHandle_t xTimer) {
+    if (MQTTAsyncClient::_instance) {
+        MQTTAsyncClient::_instance->publishHeartbeat();
+    }
 }

vesper/src/Communication/MQTTAsyncClient/MQTTAsyncClient.hpp

@@ -113,4 +113,12 @@ private:
     static const unsigned long MQTT_RECONNECT_DELAY = 5000; // 5 seconds
     void attemptReconnection();
     static void mqttReconnectTimerCallback(TimerHandle_t xTimer);
+    
+    // Heartbeat Timer (30 seconds)
+    TimerHandle_t _heartbeatTimer;
+    static const unsigned long HEARTBEAT_INTERVAL = 30000; // 30 seconds
+    void publishHeartbeat();
+    static void heartbeatTimerCallback(TimerHandle_t xTimer);
+    void startHeartbeat();
+    void stopHeartbeat();
 };

vesper/src/ConfigManager/ConfigManager.hpp

@@ -47,7 +47,7 @@ public:
         String deviceUID = "";                              // 🏷️ Factory-set UID (NVS) - NO DEFAULT
         String hwType = "";                                 // 🔧 Factory-set hardware type (NVS) - NO DEFAULT  
         String hwVersion = "";                              // 📐 Factory-set hardware revision (NVS) - NO DEFAULT
-        String fwVersion = "0.0.0";                         // 📋 Current firmware version (SD) - auto-updated
+        String fwVersion = "0";                             // 📋 Current firmware version (SD) - auto-updated (integer string)
     };
 
     /**

vesper/src/Networking/Networking.cpp

@@ -402,6 +402,17 @@ String Networking::getLocalIP() const {
     }
 }
 
+String Networking::getGateway() const {
+    switch (_activeConnection) {
+        case ConnectionType::ETHERNET:
+            return ETH.gatewayIP().toString();
+        case ConnectionType::WIFI:
+            return WiFi.gatewayIP().toString();
+        default:
+            return "0.0.0.0";
+    }
+}
+
 void Networking::forceReconnect() {
     LOG_INFO("Forcing reconnection...");
     setState(NetworkState::RECONNECTING);

vesper/src/Networking/Networking.hpp

@@ -85,6 +85,7 @@ public:
     // Returns whether the network is currently connected
     bool isConnected() const;
     String getLocalIP() const;
+    String getGateway() const;
     ConnectionType getActiveConnection() const { return _activeConnection; }
     NetworkState getState() const { return _state; }
     

vesper/src/OTAManager/OTAManager.cpp

@@ -126,8 +126,8 @@ void OTAManager::checkForUpdates(const String& channel) {
              channel.c_str(), _configManager.getHardwareVariant().c_str());
     
     if (checkVersion(channel)) {
-        float currentVersion = getCurrentVersion();
+        uint16_t currentVersion = getCurrentVersion();
-        LOG_INFO("Current version: %.1f, Available version: %.1f (Channel: %s)", 
+        LOG_INFO("Current version: %u, Available version: %u (Channel: %s)", 
                 currentVersion, _availableVersion, channel.c_str());
         
         if (_availableVersion > currentVersion) {
@@ -180,9 +180,10 @@ void OTAManager::update(const String& channel) {
     }
 }
 
-float OTAManager::getCurrentVersion() const {
+uint16_t OTAManager::getCurrentVersion() const {
     String fwVersionStr = _configManager.getFwVersion();
-    return fwVersionStr.toFloat();
+    // Parse integer directly: "130" -> 130
+    return fwVersionStr.toInt();
 }
 
 void OTAManager::setStatus(Status status, ErrorCode error) {
@@ -243,14 +244,14 @@ bool OTAManager::checkVersion(const String& channel) {
                 continue; // Try next server
             }
             
-            // Extract metadata
+            // Extract metadata - all integers now
-            _availableVersion = doc["version"].as<float>();
+            _availableVersion = doc["version"].as<uint16_t>();
             _availableChecksum = doc["checksum"].as<String>();
             _updateChannel = doc["channel"].as<String>();
             _isMandatory = doc["mandatory"].as<bool>();
             _isEmergency = doc["emergency"].as<bool>();
-            _minVersion = doc["minVersion"].as<float>();  // ✅ NEW
+            _minVersion = doc["minVersion"].as<uint16_t>();
-            _expectedFileSize = doc["fileSize"].as<size_t>();  // ✅ NEW
+            _expectedFileSize = doc["fileSize"].as<size_t>();
             
             // ✅ NEW: Validate channel matches requested
             if (_updateChannel != channel) {
@@ -270,16 +271,16 @@ bool OTAManager::checkVersion(const String& channel) {
             }
             
             // ✅ NEW: Check minVersion compatibility
-            float currentVersion = getCurrentVersion();
+            uint16_t currentVersion = getCurrentVersion();
-            if (_minVersion > 0.0f && currentVersion < _minVersion) {
+            if (_minVersion > 0 && currentVersion < _minVersion) {
-                LOG_ERROR("OTA: Current version %.1f is below minimum required %.1f", 
+                LOG_ERROR("OTA: Current version %u is below minimum required %u", 
                          currentVersion, _minVersion);
                 LOG_ERROR("OTA: Intermediate update required first - cannot proceed");
                 _lastError = ErrorCode::VERSION_TOO_LOW;
                 continue; // Try next server
             }
             
-            if (_availableVersion == 0.0f) {
+            if (_availableVersion == 0) {
                 LOG_ERROR("OTA: Invalid version in metadata from %s", baseUrl.c_str());
                 continue; // Try next server
             }
@@ -290,7 +291,7 @@ bool OTAManager::checkVersion(const String& channel) {
             }
             
             LOG_INFO("OTA: Successfully got metadata from %s", baseUrl.c_str());
-            LOG_INFO("OTA: Expected file size: %u bytes, Min version: %.1f", 
+            LOG_INFO("OTA: Expected file size: %u bytes, Min version: %u", 
                      _expectedFileSize, _minVersion);
             return true; // Success!
         } else {
@@ -571,7 +572,8 @@ bool OTAManager::installFromSD(const String& filePath) {
             }
             
             delay(1000);
-            _configManager.setFwVersion(String(_availableVersion, 1)); // 1 decimal place
+            // Version is already an integer - just convert to string: 130 -> "130"
+            _configManager.setFwVersion(String(_availableVersion));
             _configManager.saveDeviceConfig();   
             delay(500);
             ESP.restart();

vesper/src/OTAManager/OTAManager.hpp

@@ -85,8 +85,8 @@ public:
     // Status and info
     Status getStatus() const { return _status; }
     ErrorCode getLastError() const { return _lastError; }
-    float getCurrentVersion() const;
+    uint16_t getCurrentVersion() const;
-    float getAvailableVersion() const { return _availableVersion; }
+    uint16_t getAvailableVersion() const { return _availableVersion; }
     bool isUpdateAvailable() const { return _updateAvailable; }
     
     // Callbacks
@@ -106,8 +106,8 @@ private:
     Player* _player;  // NEW: Player reference for idle check
     Status _status;
     ErrorCode _lastError;
-    float _availableVersion;
+    uint16_t _availableVersion;
-    float _minVersion;  // NEW: Minimum required version
+    uint16_t _minVersion;  // NEW: Minimum required version
     size_t _expectedFileSize;  // NEW: Expected firmware file size
     bool _updateAvailable;
     String _availableChecksum;

vesper/vesper.ino

@@ -62,16 +62,18 @@
  * 👨‍💻 AUTHOR: BellSystems bonamin
  */
 
-#define FW_VERSION "1.3"
+#define FW_VERSION "131"
 
 
 /*
  * ═══════════════════════════════════════════════════════════════════════════════
  * 📅 VERSION HISTORY:
  * ═══════════════════════════════════════════════════════════════════════════════
- * v0.1 - Vesper  Launch Beta
+ * v0.1  (100)  - Vesper Launch Beta
- * v1.2 - Added Log Level Configuration via App/MQTT
+ * v1.2  (120) - Added Log Level Configuration via App/MQTT
- * v1.3 - Added Telemtry Reports to App, Various Playback Fixes
+ * v1.3  (130) - Added Telemetry Reports to App, Various Playback Fixes
+ * ═══════════════════════════════════════════════════════════════════════════════
+ * NOTE: Versions are now stored as integers (v1.3 = 130)
  * ═══════════════════════════════════════════════════════════════════════════════
  */
 
@@ -219,6 +221,18 @@ void setup()
 	// ═══════════════════════════════════════════════════════════════════════════════
 	
 	// Update firmware version (this is the ONLY identity field that can be set)
+    
+    // 🔥 MIGRATION: Convert old float-style version to integer format
+    String currentVersion = configManager.getFwVersion();
+    if (currentVersion.indexOf('.') != -1) {
+        // Old format detected (e.g., "1.3"), convert to integer ("130")
+        float versionFloat = currentVersion.toFloat();
+        uint16_t versionInt = (uint16_t)(versionFloat * 100.0f);
+        configManager.setFwVersion(String(versionInt));
+        configManager.saveDeviceConfig();
+        LOG_INFO("⚠️ Migrated version format: %s -> %u", currentVersion.c_str(), versionInt);
+    }
+    
     configManager.setFwVersion(FW_VERSION);
     LOG_INFO("Firmware version: %s", FW_VERSION);