ESP_LOGI(TAG, "MQTT_EVENT_UNSUBSCRIBED, msg_id=%d", event->msg_id); break; case MQTT_EVENT_PUBLISHED: ESP_LOGI(TAG, "MQTT_EVENT_PUBLISHED, msg_id=%d", event->msg_id); break; case MQTT_EVENT_DATA: ESP_LOGI(TAG, "MQTT_EVENT_DATA"); printf("TOPIC=%.*s\r\n", event->topic_l...
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,...
ESP_LOGI(TAG, "MQTT_EVENT_UNSUBSCRIBED, msg_id=%d", event->msg_id); break; case MQTT_EVENT_PUBLISHED: ESP_LOGI(TAG, "MQTT_EVENT_PUBLISHED, msg_id=%d", event->msg_id); break; case MQTT_EVENT_DATA: ESP_LOGI(TAG, "MQTT_EVENT_DATA"); printf("TOPIC=%.*s\r\n", event->topic_l...
event_handle = mqtt_event_handler, // .user_context = (void *)your_context }; esp_mqtt_client_handle_t client = esp_mqtt_client_init(&mqtt_cfg);//出事mqtt的相关配置 esp_mqtt_client_start(client);//开始执行mqtt } static esp_err_t mqtt_event_handler(esp_mqtt_event_handle_t event) ...
MQTT_EVENT_UNSUBSCRIBED, msg_id=%d", event->msg_id); break; case MQTT_EVENT_PUBLISHED: ESP_LOGI(TAG, "MQTT_EVENT_PUBLISHED, msg_id=%d", event->msg_id); break; case MQTT_EVENT_DATA: ESP_LOGI(TAG, "MQTT_EVENT_DATA"); printf("TOPIC=%.*s ", event->topic_len, event...
client:mqtt client句柄;config:配置结构体变量指针;esp_err_t:返回值为ESP_OK标识启动成功。 2.8、MQTT Client回调 代码语言:javascript 代码运行次数:0 运行 AI代码解释 staticesp_err_tmqtt_event_handler(esp_mqtt_event_handle_t event) event:事件结构体变量; 在这个函数中可以通过event_id来处理各种MQTT事件...
ESP_LOGI(TAG,"MQTT_EVENT_UNSUBSCRIBED, msg_id=%d",event->msg_id);break;caseMQTT_EVENT_PUBLISHED: ESP_LOGI(TAG,"MQTT_EVENT_PUBLISHED, msg_id=%d",event->msg_id);break;caseMQTT_EVENT_DATA: ESP_LOGI(TAG,"MQTT_EVENT_DATA"); printf("TOPIC=%.*s\r\n",event->topic_len,event->topic)...
我在用ESP32-C3 MQTT通信时遇到发送数据出错而重启的情况,谁能帮忙解决一下问题。这是报错导致重启的日志: I (134496) MQTT: MQTT_EVENT_ERROR I (134496) MQTT: Last errno string (Success) E (134496) MQTT_CLIENT: Error write data or timeout, written len = 0, errno=0 ...
I have a project relying on the "esp_mqtt_client_enqueue" function and after the update everything was building and running perfectly. However I noticed that suddenly my mqtt published and received messages contain no data anymore according to Mosquitto....
ESP-MQTT是一个MQTT协议客户端的应用程序 一,特性 支持多种传输层协议如:TCP,SSL,Websocket,wws. 使用url建立连接 允许一个应用中多个客户端 支持订阅,发布,认证,遗嘱,保活和3个消息质量 二,应用示例 protocols/mqtt.tcp:使用tcp,1883 端口 ...