(mosquitto_connect(mosq,host,port,keepalive)!=MOSQ_ERR_SUCCESS){std::cerr<<"MQTT connection failed"<<std::endl;mosquitto_destroy(mosq);mosquitto_lib_cleanup();return-1;}// 订阅主题if(mosquitto_subscribe(mosq,NULL,
连接成功后,打印“connect success”,同时在控制台可看到设备已在线。 图1设备列表-设备在线 注:如果连接失败,在mqtt_connect_failure函数中已实现退避重连,代码样例如下: voidmqtt_connect_failure(void*context, MQTTAsync_failureData *response){ retryTimes++;printf("connect failed: messageId %d, code %d, me...
byte errCode = mqttClient.state();//Serial.print("MQTT connect failed, error code:");//Serial.println(errCode);if(errCode == MQTT_CONNECT_BAD_PROTOCOL || errCode == MQTT_CONNECT_BAD_CLIENT_ID || errCode == MQTT_CONNECT_BAD_CREDENTIALS || errCode == MQTT_CONNECT_UNAUTHORIZED) {//Serial...
constmqtt=require("mqtt");constclient=mqtt.connect("mqtt://test.mosquitto.org");client.on("connect",()=>{client.subscribe("presence",(err)=>{if(!err){client.publish("presence","Hello mqtt");}});});client.on("message",(topic,message)=>{// message is Bufferconsole.log(message.toStr...
context = client; if ((rc = MQTTAsync_connect(client, &conn_opts)) != MQTTASYNC_SUCCESS) { printf("Failed to start connect, return code %d\n", rc); exit(EXIT_FAILURE); } void onConnectFailure(void* context, MQTTAsync_failureData* response) { printf("Connect failed, rc %d\n", ...
在MQTT协议中,错误码32002通常被定义为REASON_CODE_WRITE_TIMEOUT,表示客户端在等待将消息写入服务器时超时。 2. 错误码32002在MQTT协议中的具体含义 错误码32002表示客户端在尝试将消息写入服务器时,由于等待时间过长而没有成功,从而触发了超时机制。这通常意味着客户端与服务器之间的通信存在延迟或阻塞,导致消息无法...
,检查返回值if(result==SOCKET_ERROR){std::cout<<"connect failed with error: "<<WSAGetLastError()<<std::endl;//输出错误信息并退出程序closesocket(connectSocket);//关闭套接字WSACleanup();//清除Winsock库return1;}std::cout<<"Connected to server."<<std::endl;//连接成功,输出消息charsendBuffer...
Hello, I'm trying the new openhab internal MQTT broker and so far all my devices are working great. I can't get the MQTT Daemon to connect though (triple-checked correct credentials): [2018-11-05 18:51:24] Connecting to MQTT broker ... [...
三、我这边为了后期编码方便,将一些公共部分都封装成了工具类,分别有redis的,ResponseResult的以及ResultCode。 1.redis工具类: package com.hookapi.common;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.stereotype.Co...
//console.log("connect failed message:" + errorCode.errorMessage) }, onSuccess: function() { that.data.client = client client.onMessageArrived = function(msg) { if (typeof that.data.onMessageArrived === 'function') { return that.data.onMessageArrived(msg) ...