PROBLEM DESCRIPTION A clear and concise description of what the problem is. on Sonoff (simple), after upgrade to 12.0 version, i received a connection error with mqttserver rc -4 REQUESTED INFORMATION Make sure your have performed every ...
前一段时间，React团队发布了 React 17 RC [1]，对于这个版本，官方说的是没有新特性，可以称作是一...
This is confirmed on RabbitMQ 3.2.4, and on Mosquitto < 1.3. Mosquitto version 1.3 and 1.4 works fine without those.Event 'connect'function (connack) {}Emitted on successful (re)connection (i.e. connack rc=0).connack received connack packet. When clean connection option is false and ...
importpaho.mqtt.clientasmqttdefon_connect(client,userdata,flags,rc):ifrc==0:client.publish("test",payload="hello world",qos=0)else:print("connection failed ",rc)mqtt_client=mqtt.Client(client_id="demo_mqtt_pub",clean_session=False)mqtt_client.on_connect=on_connectmqtt_client.conn...
Qcloud_IoT_Client*mqtt_client=NULL;mqtt_client=(Qcloud_IoT_Client*)HAL_Malloc(sizeof(Qcloud_IoT_Client));intrc=qcloud_iot_mqtt_init(mqtt_client,pParams); 客户端ID client_id初始化 char*client_id=NULL;client_id=HAL_Malloc(MAX_SIZE_OF_CLIENT_ID+1);HAL_Snprintf(client_id,MAX_SIZE_OF_CLI...
第三步:安装好以后,输入命令,使环境变量生效 :source ~/.bachrc,然后重启终端 2019.05.15 下载下来的client 库是动态库.so,要编程静态库。 1、需要安装openssl和openssl-devel 安装openssl和openssl-devel_零点零一的博客-CSDN博客_openssl openssl-devel ...
broker ='0.0.0.0'#云服务器公网IPport =1883#MQTT协议端口topic ="testtopic"#发送与接收端topic需保持一致#调用 Python random.randint 函数随机生成 MQTT 客户端 idclient_id = f'python-mqtt-{random.randint(0, 1000)}'defconnect_mqtt():defon_connect(client, userdata, flags, rc):ifrc ==0: ...
staticjlong_start(JNIEnv*env,jclass cls){LOGI("start...");MQTTClient client;MQTTClient_connectOptions conn_opts=MQTTClient_connectOptions_initializer;conn_opts.username="A1_TEST_TOKEN";MQTTClient_message pubmsg=MQTTClient_message_initializer;MQTTClient_deliveryToken token;int rc;if((rc=MQTTClient...
printf("Return code from MQTT publish is %d\n", rc); NetworkDisconnect(&network); MQTTDisconnect(&client); goto begin; } LOS_Msleep(5000); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. ...
rc =MQTTConnect(&c, &data); 4、订阅主题和接收消息 订阅主题可以使用如下函数 MQTTSubscribe(&c, topic, opts.qos, messageArrived); 它的函数原型如下: DLLExportintMQTTSubscribe(MQTTClient* client,constchar* topicFilter,enumQoS, messageHandler); ...