[Python] MQTT 사용

 

1. mqtt 설치

pip install paho-mqtt

2. python (subscribe.py)

import paho.mqtt.client as mqtt

# The callback for when the client receives a CONNACK response from the server.
def on_connect(client, userdata, flags, rc):
    print("Connected with result code "+str(rc))
    client.username_pw_set("user", "1234") # broker에 password가 설정되어 있다면 추가 없으면 생략
    client.subscribe("#") # Topic

# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, msg):
    msg.payload = msg.payload.decode("utf-8")
    print("topic: "+msg.topic+" value: "+msg.payload)



client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message

client.connect("localhost") # broker IP

client.loop_forever() #무한루프