Add some logs for debugging

api-customer/src/controllers/mqtt_forwarder.py

@@ -1,6 +1,3 @@
-import json
-import time
-
 from src.services.mqtt_service import MQTTService
 
 
@@ -16,7 +13,10 @@ class MQTTForwarder:
         self.central_broker = central_mqtt
 
     def start(self, src_topic: str, dst_topic: str):
-        def forward_handler(topic: str, msg: str):
-            self.central_broker.publish(dst_topic, msg)
+        try:
+            def forward_handler(topic: str, msg: str):
+                self.central_broker.publish(dst_topic, msg)
 
-        self.local_broker.subscribe(src_topic, forward_handler)
+            self.local_broker.subscribe(src_topic, forward_handler)
+        except Exception as e:
+            print(f"An error occurred while forwarding from {src_topic} to {dst_topic}: {e}")

api-customer/src/services/mqtt_service.py

@@ -27,7 +27,6 @@ class MQTTService:
     def _on_connect(self, client, userdata, flags, rc):
         if rc == 0:
             self._connected = True
-            # Resubscribe all topics
             for topic in self._subscriptions:
                 self.client.subscribe(topic)
         else:
@@ -40,13 +39,14 @@ class MQTTService:
         if not self._connected:
             self.client.connect(self.address, self.port)
             self.client.loop_start()
-            # Wait for connection
             timeout = 5
             start = time.time()
             while not self._connected and time.time() - start < timeout:
+                print(f"Connecting to {self.address}...")
                 time.sleep(0.1)
             if not self._connected:
                 raise ConnectionError(f"Cannot connect to MQTT broker at {self.address}:{self.port}")
+            print(f"Successfully connected to {self.address}")
 
     def disconnect(self):
         if self._connected:
@@ -55,22 +55,28 @@ class MQTTService:
             self._connected = False
 
     def publish(self, topic: str, data: str, qos: int = 0):
-        self.connect()
-        payload = {
-            "timestamp": int(time.time()),
-            "data": data
-        }
-        result = self.client.publish(topic, json.dumps(payload), qos=qos)
-        result.wait_for_publish()
+        try:
+            self.connect()
+            payload = {
+                "timestamp": int(time.time()),
+                "data": data
+            }
+            result = self.client.publish(topic, json.dumps(payload), qos=qos)
+            result.wait_for_publish()
+        except Exception as e:
+            print(f"An error occurred while publishing on {topic} on {self.address} : {e}")
 
     def subscribe(self, topic: str, handler: Callable[[str, str], None], qos: int = 0):
-        self.connect()
-        self._subscriptions[topic] = handler
+        try:
+            self.connect()
+            self._subscriptions[topic] = handler
 
-        def on_message(client, userdata, msg):
-            for sub_topic, h in self._subscriptions.items():
-                if mqtt.topic_matches_sub(sub_topic, msg.topic):
-                    h(msg.topic, msg.payload.decode())
+            def on_message(client, userdata, msg):
+                for sub_topic, h in self._subscriptions.items():
+                    if mqtt.topic_matches_sub(sub_topic, msg.topic):
+                        h(msg.topic, msg.payload.decode())
 
-        self.client.on_message = on_message
-        self.client.subscribe(topic, qos=qos)
+            self.client.on_message = on_message
+            self.client.subscribe(topic, qos=qos)
+        except Exception as e:
+            print(f"An error occurred while trying to subscribe to {topic} on {self.address} : {e}")