mqtt mosquitto 安装与使用

1，安装服务端 mosquitto

       apt-get install mosquitto     

2，安装客户端paho.mqtt.python

       pip install paho-mqtt

3,  mqtt 应用在ubuntu上

     

   import paho.mqtt.client as mqtt

import time

HOST="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=1883

client=mqtt.Client()

def on_connect(client,userdata,msg):
    print("on_connect")
    pass

def on_dis_connect(client,userdata,msg):
    print("on_dis_connect")
    pass


def 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