配置以下参数:Wi-Fi 网络名称和密码、MQTT Broker 地址和端口、以及emqx/esp32主题。 // WiFiconstchar*ssid ="xxxxx";// Enter your WiFi nameconstchar*password ="xxxxx";// Enter WiFi password// MQTT Brokerconstchar*mqtt_broker ="broker.emqx.io";constchar*topic ="emqx/esp32";constchar*mqtt_u...
3、MQTT版本 MQTT-SN v1.2 MQTT 3.1 MQTT 3.1.1 MQTT 5 其中MQTT3.1和MQTT3.1.1是目前最常用的版本。 4、MQTT Servers Ably MQTT Broker Apache ActiveMQ :开源 Mosquitto:开源,对应的测试服务器(https://test.mosquitto.org/) RabbitMQ:开源 EMQ :开源,国内一家公司开发的 5、MQTT Client 嵌入式C 客户端...
voidsetup() {Serial.begin(115200);connectToWiFi();mqtt_client.setServer(mqtt_broker, mqtt_port);mqtt_client.setKeepAlive(60);mqtt_client.setCallback(mqttCallback);// Corrected callback function nameconnectToMQTT();}voidconnectToWiFi() {WiFi.begin(ssid, password);Serial.print("Connecting to...
connect() client.subscribe(topic_sub) print('Connected to %s MQTT broker, subscribed to %s topic' % (mqtt_server, topic_sub)) return client 定义一个重启和重新连接的函数 def restart_and_reconnect(): print('Failed to connect to MQTT broker. Reconnecting...') time.sleep(10) machine.reset(...
发 布者(客户端/服务器)若因种种异常接收不到PUBACK消息,会再次重新发送PUBLISH消息,同时设置DUP标记为1。接收者以服务器为例,这可能 会导致服务器收到重复消息,按照流程,broker(服务器)发布消息到订阅者(会导致订阅者接收到重复消息),然后发送一条PUBACK确认消息到发布 者。
使用PubSubClient 连接到公共 MQTT Broker。 client.setServer(mqtt_broker, mqtt_port); client.setCallback(callback);while(!client.connected()) { String client_id ="esp32-client-"; client_id += String(WiFi.macAddress()); Serial.printf("The client %s connects to the public mqtt broker\n"...
PC上创建一个CLIENT, Client里面传入本地IP与MQTT Broker服务的端口号, 与PC上面的Server建立一个长连接 PC上的Client, 发送数据帧 Topic ID + 指令, Topic ID为LED Control 数据帧: TOPIC_ID:LED_CONTROL, MESSAGE:LED_ON 数据发送给Server, Server发现ESP32开发板订阅了LED_CONTROL这个主题, 然后就通过ESP32...
client.setServer(mqtt_broker, mqtt_port); while (!client.connected()) { String client_id = "esp32-client-"; client_id += String(WiFi.macAddress()); Serial.printf("The client %s connects to the public mqtt broker\n", client_id.c_str()); ...
#define AIO_SERVER "192.168.128.1" // 在爱智APP->设备->MQTT Broker 设置,可以看到并且设置 #define AIO_SERVERPORT 1883 // 在爱智APP->设备->MQTT Broker 设置,可以看到并且设置 #define AIO_USERNAME "user" #define AIO_KEY "passwd" /*** Global State (you don't need to change this!) ...