client端

建立连接

broker tools.emqx.io/

import paho.mqtt.client as mqtt

def on_subscribe(client, userdata, mid, granted_qos):
    pass
def on_connect(client, userdata, flags, rc):
    print("Connected with result code " + str(rc))
def on_message(client, userdata, msg):
    print('topic:', msg.topic)
    print('msg:', str(msg.payload))
    
# .......mqtt连接........ #
client = mqtt.Client(protocol=3)
client.username_pw_set("admin", "password")                     # 用户名和密码设置
client.on_connect = on_connect                                  # 连接递归
client.on_message = on_message                                  # 消息递归
client.on_subscribe = on_subscribe
client.connect(host="broker.emqx.io", port=8083, keepalive=60)      # 连接
time.sleep(1)

订阅

  client.subscribe(topic="testtopic/testandy", qos=0)             # 订阅主题

发布

 client.publish(topic="testtopic/testandy", payload="123", qos=0)

完整代码

import time
import paho.mqtt.client as mqtt
import json

def on_subscribe(client, userdata, mid, granted_qos):
    pass

def on_connect(client, userdata, flags, rc):
    print("Connected with result code " + str(rc))

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


# .......mqtt连接........ #
client = mqtt.Client(protocol=3)
client.username_pw_set("admin", "password")                     # 用户名和密码设置
client.on_connect = on_connect                                  # 连接
client.on_message = on_message                                  # 消息
client.on_subscribe = on_subscribe
client.connect(host="broker.emqx.io", port=1883, keepalive=60)      # 连接
time.sleep(1)

while True:
    client.subscribe(topic="testtopic/test", qos=0)             # 订阅主题
    client.loop_start()
    time.sleep(10)

服务端

最基础的填个名字即可测试

连接

新建订阅

发布