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import logging
import django.conf
import paho.mqtt.client as mqtt
log = logging.getLogger(__name__)
class MQTTClient:
def __init__(self):
self.reconnect = True
self.connected = False
self.client = mqtt.Client()
self.client.on_connect = self.on_connect
self.client.on_disconnect = self.on_disconnect
self.client.on_message = self.on_message
def loop_forever(self):
self.connect()
self.client.loop_forever()
def loop_start(self):
self.connect()
self.client.loop_start()
def loop_stop(self):
self.disconnect(reconnect=False)
self.client.loop_stop()
def connect(self):
try:
self.client.connect(
django.conf.settings.MQTT_SERVER,
django.conf.settings.MQTT_PORT,
60, # TODO: make the keepalive configurable
)
except OSError as e:
log.debug("Could not connect to MQTT server")
log.debug(e)
def disconnect(self, reconnect: bool = True):
self.reconnect = reconnect
self.client.disconnect()
def on_connect(self, client, userdata, flags, rc):
log.info("Connected to MQTT")
self.connected = True
client.subscribe(django.conf.settings.MQTT_TOPIC)
def on_disconnect(self, client, userdata, rc):
log.info("Disconnected from MQTT")
self.connected = False
if self.reconnect:
self.connect()
def on_message(self, client, userdata, msg):
print(
"Received msg %s %s", msg.topic, msg.payload.decode()
)
log.debug(
"Received msg %s %s", msg.topic, msg.payload.decode()
)
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