Umstellung auf MQTT

src/communication.h

@@ -1,5 +1,6 @@
 #include <Arduino.h>
 #include "master.h"
+#include <ArduinoJson.h>
 
 #include <PicoMQTT.h>
 
@@ -21,14 +22,18 @@ PicoMQTT::Server mqtt;
 
 
 void setupMqttServer() {
+
   // Set up the MQTT server with the desired port
   // Subscribe to a topic pattern and attach a callback
     mqtt.subscribe("#", [](const char * topic, const char * payload) {
         Serial.printf("Received message in topic '%s': %s\n", topic, payload);
+        updateStatusLED(3); // Flash LED on message received
     });
   
   // Start the MQTT server
    mqtt.begin();
+
+   Serial.println("MQTT server started on port 1883");
 }
 
 void loopMqttServer() {
@@ -38,7 +43,7 @@ void loopMqttServer() {
   // Optionally, you can publish a message periodically
   static unsigned long lastPublish = 0;
   if (millis() - lastPublish > 5000) { // Publish every 5 seconds
-    mqtt.publish("test/topic", "Hello from ESP32!");
+    mqtt.publish("heartbeat/live", "Alive!");
     lastPublish = millis();
   }
 }