Just a thought but now I can see why I was getting theAttempting MQTT connection...failed, rc=-2it would make sense that the same error would be issued if the MQTT server had changed IP address or was otherwise uncontactable. Anyone getting that message should probably check that their MQT...
Attempting MQTT connection...failed, rc=-2 try again in 5 seconds Attempting MQTT connection...Connected to aREST.io Attempting MQTT connection...failed, rc=-2 try again in 5 seconds Attempting MQTT connection...failed, rc=-2 try again in 5 seconds Attempting MQTT connection...failed, rc...
MQTTAsync_disconnectOptions disc_opts = MQTTAsync_disconnectOptions_initializer;intrc;intch;// 创建异步连接客户端,不使用 Paho SDK 内置的持久化来处理缓存消息if((rc =MQTTAsync_create(&client, ADDRESS, CLIENTID, MQTTCLIENT_PERSISTENCE_NONE,NULL)) != MQTTASYNC_SUCCESS) {printf("Failed to create c...
printf("Successful connection\n"); printf("Subscribing to topic %s\nfor client %s using QoS%d\n\n" "Press Q<Enter> to quit\n\n", TOPIC, CLIENTID, QOS); opts.onSuccess = onSubscribe; opts.onFailure = onSubscribeFailure; opts.context = client; if ((rc = MQTTAsync_subscribe(client, ...
问正在尝试MQTT connection...failed，rc=-4 \f25 5秒后重试EN前一段时间，React团队发布了 React 17...
subscribe("test", 1) else: print("connection failed ", rc) mqtt_client = mqtt.Client(client_id="demo_mqtt_sub", clean_session=False) mqtt_client.on_connect = on_connect mqtt_client.on_subscribe = on_subscribe mqtt_client.on_message = on_message mqtt_client.connect("192.168....
{MQTTClient client;MQTTClient_connectOptions conn_opts=MQTTClient_connectOptions_initializer;intrc;if((rc=MQTTClient_create(&client,ADDRESS,CLIENTID,MQTTCLIENT_PERSISTENCE_NONE,NULL))!=MQTTCLIENT_SUCCESS){printf("Failed to create client, return code %d\n",rc);rc=EXIT_FAILURE;gotoexit;}if((rc=...
(MQTTAsync)context; MQTTAsync_connectOptions conn_opts = MQTTAsync_connectOptions_initializer; int rc; printf("\nConnection lost\n"); if (cause) { printf(" cause: %s\n", cause); } printf("Reconnecting\n"); conn_opts.keepAliveInterval = 20; conn_opts.cleansession = 1; conn_opts.max...
conn_opts.password = PASSWORD;//使用MQTTClient_connect将client连接到服务器,使用指定的连接选项。成功则返回MQTTCLIENT_SUCCESSif((rc =MQTTClient_connect(client, &conn_opts)) != MQTTCLIENT_SUCCESS) {printf("Failed to connect, return code %d\n", rc);exit(EXIT_FAILURE); ...
Serial.print("Attempting MQTT connection..."); // Create a random client ID StringclientId="ESP8266Client-"; clientId+=String(random(0xffff),HEX); // Attempt to connect if(client.connect(clientId.c_str())) { Serial.println("connected"); ...