importpaho.mqtt.clientasmqtt# 连接MQTT服务器defon_connect(client,userdata,flags,rc):print("Connected with result code "+str(rc))client.subscribe("topic/test")# 订阅主题# 发送消息defon_publish(client,userdata,mid):print("Message Published...")client=mqtt.Client()client.on_connect=on_connect c...
self.mqttPort = mqttPort self.username_pw_set(username, password=password) self.connect(self.mqttServer, self.mqttPort, timeout) # keeplive仅为10000秒 self.on_connect = self.on_connect def getClient(self): return self.client def on_connect(self, client, userdata, flags, rc): linkAddr =...
**种类:**1.服务器连接on_connect()/服务器断开 on_disconnect() 2.信息的回调 on_message() 3.信息的发布on_publish()/信息的订阅on_subscribe()**介绍:**1. 使用connect()/connect_async() 连接MQTT代理2.频繁的调用loop()来维持与MQTT代理之间的流量2.1. 或者使用loop_start()来设置一个线程为你调用...
我们要用Python实现此功能需要 重新编写脚本,原理很简单,就是将图片转为base64编码,然后发送端建立与平台的连接,通过MQTT协议发送,平台中转给接收端,接收端可以解码此图片呈现。 直接上代码: import os import time import json import base64 import hmac import hashlib import paho.mqtt.client as mqtt # 阿里云...
def on_message(client, userdata, message): print(“Received message: ” + str(message.payload)) client.on_message = on_message “` 如何在Python中处理MQTT连接中断? 1.添加重连逻辑:当MQTT连接由于网络问题或其他原因中断时,你可以在Python中添加重连逻辑。使用`on_disconnect`方法来设置当连接断开时的自...
client.on_publish = on_publish client.on_unsubscribe = on_unsubscribe client.on_subscribe = on_subscribe client.on_disconnect = on_disconnect client.username_pw_set(username = auth_Info.mqttUsername, password = auth_Info.mqttPassword) 相关的回调函数构造,主要参考了paho-mqtt库官方文档: ...
def on_publish(client, obj, mid): print("OnPublish, mid: " + str(mid)) # 当收到关于客户订阅的主题的消息时调用。 message是一个描述所有消息参数的MQTTMessage。 def on_message(client, userdata, msg): print(msg.topic + " " + str(msg.payload)) # 当客户端有日志信息时调用 def on_log...
mqttc.on_connect = on_connect 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) ...
client.on_connect = on_connect client.on_message = on_message # 连接到MQTT服务器并启动循环 client.connect(BROKER, PORT, KEEPALIVE) #循环开始 client.loop_start() # 发布JSON消息到MQTT主题 json_message = { "MessageId": message_id,
mqttc.on_connect = on_connect 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) ...