python 实现简单的 MQTT 协议收发-526互联

安装 MQTT Broker

mosquitto 纯 C 实现
https://github.com/eclipse/mosquitto.git

安装

brew install  mosquitto

启动服务

mosquitto

接受消息

import paho.mqtt.client as mqtt

def on_connect(client, userdata, flags, rc):
    print("Connected with result code " + str(rc))
    client.subscribe("test/topic")

def on_message(client, userdata, msg):
    print(msg.topic + " " + str(msg.payload))

if __name__ == '__main__':
    client = mqtt.Client()
    client.on_connect = on_connect
    client.on_message = on_message
    client.connect("127.0.0.1", 1883, 60)
    client.loop_forever()

发送消息

import time
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
    print("Connected with result code " + str(rc))
    client.publish("test/topic", "Connect, MQTT!")

if __name__ == '__main__':

    client = mqtt.Client()
    client.on_connect = on_connect
    client.connect("127.0.0.1", 1883, 60)
    client.loop_start()

    while True:
        client.publish("test/topic", "Hello, MQTT!")
        time.sleep(10)