ADDRESS,CLIENTID,MQTTCLIENT_PERSISTENCE_NONE,NULL);// 设置连接参数conn_opts.keepAliveInterval=20;conn_opts.cleansession=1;// 连接到 MQTT 代理token=MQTTAsync_connect(client,&conn_opts);// 处理连接操作的异步结果//
以下是一个连接 MQTT 服务器的示例代码: MqttConnectOptionsoptions=newMqttConnectOptions();options.setUserName("myUsername");options.setPassword("myPassword".toCharArray());options.setConnectionTimeout(10);// 设置连接超时时间为10秒MqttTokentoken=client.connect(options);token.waitForCompletion(); 1. 2....
String password = "yourpwd"; //输入创建principal返回的password String topic = "topic1"; //订阅的消息主题 MqttConnectOptions options = new MqttConnectOptions(); options.setCleanSession(true); options.setUserName(username); options.setPassword(password.toCharArray()); MqttClient client = new MqttC...
void MQTT_init(void) { int rc=0;; MQTTAsync_create(&client, ADDRESS, CLIENTID, MQTTCLIENT_PERSISTENCE_NONE, NULL); MQTTAsync_setCallbacks(client, NULL, connlost, NULL, NULL); conn_opts.keepAliveInterval = 700; conn_opts.cleansession = 1; conn_opts.onSuccess = onConnect; conn_opts....
An application can connect to an MQTT server using: A plain TCP socket An secure SSL/TLS socket To enable messages to be delivered even across network and client restarts messages need to be safely stored until the message has been delivered at the requested quality of service. A ...
Just as a forewarning, I'm using the patch from my pull request #147. I don't remember seeing this issue before, but I also just updated to the newest version of the library. After calling MQTTAsync_connect with a connection that will fa...
1.创建基础变量 ① 创建MQTTAsync_connectOptions类型的变量conn_opt ② 创建MQTTAsync 类型的client变量 2.创建MQTTAsync_createOptions类型的变量 charstruct_id[4]//必须是MQCO.intstruct_version//0或1,其中0标志no MQTTVersion,默认0intsendWhileDisconnected//是否允许丢失连接时发送消息,默认0intmaxBufferedMessa...
第一次GC的时候，软引用没有被回收，是因为这时候内存资源充足。第二次由于分配了较大的内存，导致GC...
voidsetup(){Serial.begin(115200);Serial.println();Serial.println();// 1.创建了2个计时器,用于重连mqttReconnectTimer=xTimerCreate("mqttTimer",pdMS_TO_TICKS(2000),pdFALSE,(void*)0,reinterpret_cast<TimerCallbackFunction_t>(connectToMqtt));wifiReconnectTimer=xTimerCreate("wifiTimer",pdMS_TO_TICK...
MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer; MQTTAsync_message pubmsg = MQTTAsync_message_initializer; MQTTAsync_token token; signal(SIGINT, handleSignal); signal(SIGTERM, handleSignal); quietMode = 0; // Parse the arguments - for (i=1; i<argc; i++) { //...