Started implementing the sending of messaged towards the node via mqtt

modules/hotplug.py

@@ -56,6 +56,11 @@ class DefaultThread(ReaderThread):
         self.usb_device = usb_device
         self.serial_number = serial_number
         self.logger = Logger( __name__+'.'+self.__class__.__name__ )
+
+        tx_topic = self.hotplug_module.mqtt_topic_prefix + self.serial_number + "/tx"
+        self.hotplug_module.logger.debug("Subscribed to topic {}".format(tx_topic))
+        self.hotplug_module.mqtt_client.subscribe(tx_topic, qos=2)
+
         super(DefaultThread, self).__init__(serial, protocol)
     
     def run(self):
@@ -116,6 +121,8 @@ class Hotplug(Module):
         handle = hotplug.register_callback(events, flags, 0x0403, 0x6001, dev_class, self.hotplug_callback, {'baud': 19200})
         self.handles.append( handle )
 
+        self.mqtt_client.on_message = self.on_message
+
         return
         #TODO
         if hasattr(node_config, 'serial'):
@@ -135,6 +142,14 @@ class Hotplug(Module):
         #product_id = 0x204b
         #handle = hotplug.register_callback(events, flags, vendor_id, product_id, dev_class, self.hotplug_callback, user_data)
 
+    def on_message(self, client, userdata, msg):
+        node_id = msg.topic.split('/')[2]
+        self.logger.debug("Got message for {}".format(node_id))
+        self.logger.debug("Length of devices: {}".format(len(self.devices)))
+        for addr, node_device in self.devices.items():
+            self.logger.debug("Checking node_device with serial number {}".format(node_device.serial_number))
+            if node_device.serial_number == node_id:
+                self.logger.debug("Found device, forwarding message")
     #def send(self, send_dict):
     #    self.callback_send(send_dict)