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++;pri
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...
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", ...
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...
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...
,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...
warn("MQTT server start failed", result.cause()); } }); } /** * 处理MQTT客户端连接请求。 * @param endpoint MqttEndpoint实例,代表与客户端的连接 */ protected void doConnect(MqttEndpoint endpoint) { if (endpoint.auth() == null) { endpoint.reject(MqttConnectReturnCode.CONNECTION_REFUSED_...
//console.log("connect failed code:" + errorCode.errorCode) //console.log("connect failed message:" + errorCode.errorMessage) }, onSuccess: function() { that.data.client = client client.onMessageArrived = function(msg) { if (typeof that.data.onMessageArrived === 'function') { ...
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 ... [...
ActionCode string 设备动作的返回码。取值说明如下: mqtt.trace.action.connect:设备动作为 connect 时返回该参数值。 mqtt.trace.action.close:设备动作为 close 时返回该参数值。 mqtt.trace.action.disconnect:设备动作为 disconnect 时返回该参数值。 mqtt.trace.action.connect Action string 设备动作。取值说明如...