should work so far

src/pv_controller/ToDevices.py

@@ -13,17 +13,26 @@ class ToDevices(AbstractMqttPublisher):
             sleep(60.0)
 
     def onMessage(self, topic, payload):
-        logger.info("mqtt message received: {} -> {}".format(topic, str(payload)))
-        if payload == b'On':
-            self.modbusHandler.writeCoil(1, 0, 1)
-        elif payload == b'Off':
-            self.modbusHandler.writeCoil(1, 0, 0)
-        else:
-            logger.warning(f"Illegal command {payload} received")
-
+        try:
+            logger.debug("mqtt message received: {} -> {}".format(topic, str(payload)))
+            for device in self.config.input:
+                if topic != device.subscribe_topic:
+                    continue
+                logger.debug(f"{topic=} matches {device.subscribe_topic=}, processing")
+                if not device.enabled:
+                    logger.debug(f"  device disabled, skipping")
+                    continue
+                if device.register_type != 'coil':
+                    raise Exception(f"Unsupported register type {device.register_type} for input device {device.name}")
+                value = payload == b'On'
+                self.modbusHandler.writeCoil(device.slave_id, device.address, value)
+        except Exception as e:
+            logger.error(f"Caught exception in onMessage: {str(e)}")
 
 
     def onConnect(self):
         logger.info("mqtt connected")
-        self.client.subscribe("{}".format(self.config["relaisSubscribeTopic"]))
+        for device in self.config.input:
+            self.client.subscribe(device.subscribe_topic)
+            logger.info(f"subscribed to topic: {device.subscribe_topic}")
         logger.info("subscribed")