def start(self):
"""
Starts the connection to the MQTT broker
:return:
"""
l.debug("Initializing the MQTT connection...")
self._mqtt_client.connect(self.domain, self.port, keepalive=30)
# Starts a new thread that handles mqtt protocol and calls us back via callbacks
l.debug("(Re)Starting the MQTT loop.")
self._mqtt_client.loop_stop(True)
self._mqtt_client.loop_start()
self.connect_event.wait()
# Subscribe to the corresponding topics ...
self.device_topic = build_device_request_topic(self.target_device_uuid)
self.client_response_topic = build_client_response_topic(
self.user_id, self._app_id)
self.user_topic = build_client_user_topic(self.user_id)
l.info(f"Subscribing to topic: {self.device_topic}")
self._mqtt_client.subscribe(self.device_topic)
self.subscribe_event.wait()
self.subscribe_event.clear()
l.info(f"Subscribing to topic: {self.client_response_topic}")
self._mqtt_client.subscribe(self.client_response_topic)
self.subscribe_event.wait()
self.subscribe_event.clear()
l.info("Subscribing to topic: {self.user_topic}")
self._mqtt_client.subscribe(self.user_topic)
self.subscribe_event.wait()
self.subscribe_event.clear()
async def _async_send_and_wait_ack(self, future: Future, target_device_uuid: str, message: dict, timeout: float):
md = self._mqtt_client.publish(topic=build_device_request_topic(target_device_uuid), payload=message, qos=1)
try:
return await asyncio.wait_for(future, timeout, loop=self._loop)
except TimeoutError as e:
_LOGGER.error(f"Timeout occurred while waiting a response for message {message} sent to device uuid "
f"{target_device_uuid}. Timeout was: {timeout} seconds.")
raise CommandTimeoutError()
