mqtt_client: esp_mqtt_handle_transport_read_error: transport_read() error: errno=128 ESP_Project: MQTT_EVENT_ERROR ESP_Project: Error type: 1 ESP_Project: Last error code reported from esp-tls: 0x0 ESP_Project: Last tls stack error number: 0x4c ESP_Project: Last captured errno : 0 mq...
ESP_LOGI(TAG, "MQTT_EVENT_SUBSCRIBED, msg_id=%d", event->msg_id); break; case MQTT_EVENT_UNSUBSCRIBED://取消订阅 ESP_LOGI(TAG, "MQTT_EVENT_UNSUBSCRIBED, msg_id=%d", event->msg_id); break; case MQTT_EVENT_PUBLISHED://发布成功 ESP_LOGI(TAG, "MQTT_EVENT_PUBLISHED, msg_id=%d", ev...
(若消息等级为 QoS 2, 发布者在发布消息时确保接收者只接收到一个消息并且消息不会重复)。...以下是 3 种不同 QoS 值的处理流程图:在 MQTT 3.0 中,QoS 0 的消息发布流程是这样 QoS 0 消息 | 发送者 | 控制报文流向 | 接受者 | | ---...,是不会去发...
F、retain 当我们使用MQTT客户端发布消息(PUBLISH)时,如果将RETAIN标志位设置为true,那么MQTT服务器会将最近收到的一条RETAIN标志位为true的消息保存在服务器端 7、esp_err_t esp_mqtt_client_register_event(esp_mqtt_client_handle_t client, esp_mqtt_event_id_t event, esp_event_handler_t event_handler,...
publish("Ad_B", "OK"); generateRandomData(); } } void loop() { if (!client.connected()) { reconnect(); } client.loop(); delay(1000); } void reconnect() { while (!client.connected()) { Serial.print("Attempting MQTT Connection..."); //Attempt to Connect if (client.connect(...
if(strstr(dataf, "check")){ char *token=strtok(dataf,"check_"); char *topic; topic = (char*)malloc( 50 * sizeof(char) ); strcpy(topic,"vi/ven/vi002/"); strcat(topic,token); topic = realloc(topic,sizeof(topic) * sizeof(int)); msg_id = esp_mqtt_client_publish(client,topi...
esp32中esp_mqtt_client_publish函数 esp32 matter matter协议学习笔记--以乐鑫方案为例 0. 写在前边的话 1. matter 协议基本概念 2. 设备间的本地自动化交互 2.1 同步控制的实例: 2.2 异步通知(订阅、报告) 3. 桥接设备 4. thread 边界路由器
server_addr = "183.230.40.96" --OneNet服务器ip地址,也可以写成"http://mqtts.heclouds.com"(推荐) server_port = 1883 --MQTT 连接参数(适用于ONE NET平台) mqtt_con_clientID = "TestDevice001" mqtt_con_username = "353255" mqtt_con_password = "2F5RJwGwytPWvVDB04K7rnw63Dr3D" ...
FRAMESIZE_QVGA);}String msg;int timeCount = 0;void getimg(){//拍照分段发送到mqttcamera_fb_t *fb = esp_camera_fb_get();if (fb){Serial.printf("width: %d, height: %d, buf: 0x%x, len: %d\n", fb->width, fb->height, fb->buf, fb->len);char data[4104];//client.publish(mqtt...