fix: mqtt integration

- Fixed subscription format to use QOS_1 constant
- Added more detailed logging
- Set initial state to 'closed' explicitly
- Made publish_state handle both bool and str states
- Added retain flag to state messages

backend/mqtt_integration.py

@@ -1,7 +1,7 @@
 import os
 import json
 import asyncio
-from typing import Optional, Callable
+from typing import Optional, Callable, Union
 from gmqtt import Client as MQTTClient
 import logging
 
@@ -102,9 +102,10 @@ class HomeAssistantMQTT:
         logger.info("Connected to MQTT broker")
         self._connected = True
         try:
-            # Subscribe to command topic
-            await self.client.subscribe([{'topic': self.command_topic, 'qos': 1}])
-            logger.info(f"Subscribed to {self.command_topic}")
+            # Subscribe to command topic using gmqtt's Subscription class
+            from gmqtt.mqtt.constants import QOS_1
+            await self.client.subscribe([(self.command_topic, QOS_1)])
+            logger.info(f"Subscribed to command topic: {self.command_topic}")
             
             # Publish discovery config
             config = {
@@ -128,17 +129,21 @@ class HomeAssistantMQTT:
             )
             logger.info("Published Home Assistant discovery config")
             
-            # Publish initial availability
+            # Publish initial availability and state
             await self.client.publish(
                 self.availability_topic,
                 "online",
                 qos=1,
                 retain=True
             )
-            logger.info("Published initial availability state")
+            logger.info("Published availability: online")
+            
+            await self.publish_state("closed")
+            logger.info("Published initial state: closed")
             
         except Exception as e:
-            logger.error(f"Error in post-connect setup: {e}", exc_info=True)
+            logger.error(f"Failed in post-connect setup: {e}", exc_info=True)
+            await self.client.disconnect()
 
     async def connect(self):
         """Connect to MQTT broker"""
@@ -192,9 +197,11 @@ class HomeAssistantMQTT:
             except Exception as e:
                 logger.error(f"Failed to subscribe to topic: {e}")
 
-    async def publish_state(self, state: str):
+    async def publish_state(self, state: Union[bool, str]):
         """Publish gate state"""
-        await self.publish(self.state_topic, state)
+        if isinstance(state, bool):
+            state = "open" if state else "closed"
+        await self.publish(self.state_topic, state, retain=True)
 
     def set_command_callback(self, callback: Callable):
         """Set callback for handling commands"""