print(msg.topic+" "+str(msg.payload)+'\n') client1 = mqtt.Client() client1.username_pw_set("marshal", "123456") #username: marshal | password: 123456 client1.on_connect = on_connect client1.on_message = on_message client2 = mqtt.Client() client2.username_pw_set("admin", "passw...
因此,正确使用 loop_stop() 方法来确保 MQTT 客户端正常关闭并防止由于未关闭连接而可能出现的任何潜在问题至关重要。 connect_async() 是用来做什么的? connect_async()在 MQTT 客户端应用程序需要长期 MQTT 连接或需要在后台保持 MQTT 连接处于活动状态而不阻塞主线程的情况下很有用。其主要使用场景有: 长期MQTT...
msg=json.dumps(msg_dict)ifnotclient.is_connected(): logging.error("publish: MQTT client is not connected!") time.sleep(1)continueresult=client.publish(TOPIC, msg)#result: [0, 1]status =result[0]ifstatus ==0:print(f'Send `{msg}` to topic `{TOPIC}`')else:print(f'Failed to send m...
在调用loop_start函数后,可以分别调用connect、publish、subscribe等方法来进行MQTT通信。但是在使用完MQTT客户端后,需要调用loop_stop函数来停止后台线程 loop_forever函数是一个阻塞的函数,可以启动一个线程来处理MQTT客户端的网络通信和事件处理。该函数会一直阻塞当前线程,直到MQTT客户端接收到disconnect消息或者调用了disc...
最后,使用disconnect方法来断开MQTT连接,并使用loop_stop方法停止循环。 序列图 为了更直观地理解代码的执行流程,我们可以使用序列图来表示。下面是一个断开MQTT连接的序列图示例: MQTT ServerClientMQTT ServerClient连接请求连接响应订阅主题请求订阅响应消息发布请求消息发布响应断开请求断开响应 ...
"Data": {"Result":"ok"}, "Time": time } json_payload = json.dumps(json_message) client.publish(TOPIC_pub, json_payload, QOS) # 停止MQTT循环并关闭连接 #client.loop_stop() #循环一直执行 client.loop_forever() #断开连接 #client.disconnect()...
defserver_stop(client):client.loop_stop()# 停止服务端sys.exit(0)defserver_main():client_id=time.strftime('%Y%m%d%H%M%S',time.localtime(time.time()))client=mqtt.Client(client_id,transport='tcp')server_conenet(client)if__name__=='__main__':# 启动监听server_main()...
defserver_stop(client):client.loop_stop()# 停止服务端sys.exit(0)defserver_main():client_id=time.strftime('%Y%m%d%H%M%S',time.localtime(time.time()))client=mqtt.Client(client_id,transport='tcp')server_conenet(client)if__name__=='__main__':# 启动监听server_main()...
mqttc.on_publish = on_publish mqttc.on_subscribe = on_subscribe mqttc.on_log = on_log # 设置账号密码 # mqttc.username_pw_set(username, password=password) mqttc.connect(strBroker, port, 60) mqttc.subscribe(topic, 0) mqttc.loop_forever() ...
mqttc.on_publish = on_publish mqttc.on_subscribe = on_subscribe mqttc.on_log = on_log # 设置账号密码 # mqttc.username_pw_set(username, password=password) mqttc.connect(strBroker, port, 60) mqttc.subscribe(topic, 0) mqttc.loop_forever() ...