Rework some stuff

rpi/services/mqtt_service.py

@@ -83,6 +83,7 @@ class MQTTService:
             self._subscriptions[topic] = handler
 
             def on_message(client, userdata, msg):
+                print(f"Received {msg.payload} on {msg.topic} from {client}")
                 for sub_topic, h in self._subscriptions.items():
                     if mqtt.topic_matches_sub(sub_topic, msg.topic):
                         h(msg.topic, msg.payload.decode())