mqtt mosquitto 安装与使用

2，安装客户端paho.mqtt.python

import timeHOST="127.0.0.1"//mosquitto 安装的主机ip，127.0.0.1 表示与mosquitto在同一机器上PORT=1883client=mqtt.Client()def on_connect(client,userdata,msg):    print("on_connect")    passdef on_dis_connect(client,userdata,msg):    print("on_dis_connect")    passdef mqtt_sub(topic):    client.subscribe(topic,1)def mqtt_pub(topic,payload):    client.publish(topic,payload,1,1)def mqtt_init(on_message):    client.connect(HOST,PORT,60)    client.on_connect=on_connect    client.on_disconnect=on_dis_connect    client.on_message = on_message    client.loop_start()

def on_message(client,userdata,msg):    print(msg.topic+":+"+str(msg.payload))//如果有人发布订阅，这个地方接收订阅  

if __name__=='__main__':    mqtt_init(on_message):    mqtt_sub("/device/+/upgrade")//订阅一个topic

    while True:

      time.sleep(10)

4,MQTTBox   一个window端的mqtt客户端。可以配合着上面的程序进行测试。配置界面，其中host填上mosquitto 所在主机，协议mqtt/tcp 其他的不用太关心

发布topic界面