Added initial Melody Playback Ability

Now, controlled via MQTT a Playback of a melody can Start, Stop, Pause 
etc. 

Settings like speed, total duration, pauses etc can be set.

build/sketch/vesper.ino.cpp

@@ -0,0 +1,108 @@
+#include <Arduino.h>
+#line 1 "C:\\Users\\espi_\\Documents\\Arduino\\vesper\\vesper.ino"
+#include <WiFi.h>
+#include <AsyncMqttClient.h>
+#include <ArduinoJson.h>
+#include <FS.h>
+#include <SPIFFS.h>
+#include <string>
+#include <Wire.h>
+#include <Adafruit_PCF8574.h>
+
+#define PCF8574_ADDR 0x24
+Adafruit_PCF8574 relays;
+
+#define DEV_ID "id-96638646"
+
+struct melody_attributes {
+  std::string name;                   // Contains the name of each Melody saved
+  uint16_t id;						  // The (internal) ID of the selected melody
+  uint32_t duration;                  // Indicates the total Duration in Minutes
+  bool infinite_play;                 // Infinite Loop Indicator (If True the melody will loop forever or until stoped, with pauses of "interval duration in between loops")
+  uint16_t interval_duration;         // Indicates the Duration of the Interval between finished loops, IF "inf" is true
+  uint16_t speed;                      // Indicates the Speed in 9 Steps. 1-9 (Steps can be adjusted in the bellEngine function)
+};
+
+melody_attributes melody;
+std::vector<uint16_t> melody_steps;
+
+volatile bool playing = false;
+uint16_t relayMask = 0;                // Bitmask indicating which relays to activate
+uint8_t relayDurations[16] = {100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100};      // Deactivation timers for each relay in milliseconds
+volatile uint64_t startTime = 0;
+bool forceStop = false;
+
+#include "functions.hpp"
+#include "config.h"  // Sustituir con datos de vuestra red
+#include "MQTT.hpp"
+#include "ESP32_Utils.hpp"
+#include "ESP32_Utils_MQTT_Async.hpp"
+#include "bellEngine.hpp"
+#include "hammerTime.hpp"
+#include "Timers.hpp"
+
+
+TaskHandle_t bellEngineHandle = NULL;
+
+
+
+#line 47 "C:\\Users\\espi_\\Documents\\Arduino\\vesper\\vesper.ino"
+void setup();
+#line 99 "C:\\Users\\espi_\\Documents\\Arduino\\vesper\\vesper.ino"
+void loop();
+#line 47 "C:\\Users\\espi_\\Documents\\Arduino\\vesper\\vesper.ino"
+void setup()
+{
+  // Initialize Serial Communications & I2C Bus (for debugging)
+	Serial.begin(115200);
+  delay(50);
+
+	// Initialize PCF8574
+	Wire.begin(4,15);
+	relays.begin(PCF8574_ADDR, &Wire);
+	// Initialize Relays
+	for (uint8_t p=0; p<6; p++){
+		relays.pinMode(p, OUTPUT);
+		relays.digitalWrite(p, HIGH);
+	}
+	
+  // Initialize SPIFFS
+  if (!SPIFFS.begin(true)) {  // 'true' means format SPIFFS if initialization fails
+    Serial.println("Failed to mount SPIFFS");
+    return;
+  }
+  Serial.println("SPIFFS mounted successfully");
+	delay(50);
+
+  
+  // Initialize WiFi and MQTT
+	WiFi.onEvent(WiFiEvent);
+	InitMqtt();
+	ConnectWiFi_STA();
+  delay(1000);
+
+  xTaskCreatePinnedToCore(
+    bellEngine, // Task function
+    "bellEngine",   // Task name
+    8192,         // Stack size
+    NULL,         // Task input parameters
+    1,            // Task priority, be carefull when changing this
+    &bellEngineHandle,         // Task handle, add one if you want control over the task (resume or suspend the task)
+    1             // Core to run the task on
+  );
+
+  xTaskCreatePinnedToCore(
+    durationTimer, // Task function
+    "durationTimer",   // Task name
+    8192,         // Stack size
+    NULL,         // Task input parameters
+    1,            // Task priority, be carefull when changing this
+    NULL,         // Task handle, add one if you want control over the task (resume or suspend the task)
+    1             // Core to run the task on
+  );
+
+}
+
+void loop()
+{
+}