添加 MQTT 命令处理功能，支持远程控制模式与阈值配置

components/agri_env/agri_env.c

@@ -28,6 +28,12 @@ typedef struct {
 } agri_env_ctx_t;
 
 static agri_env_ctx_t s_ctx;
+static agri_env_mqtt_cmd_cb_t s_mqtt_cmd_cb = NULL;
+
+void agri_env_set_mqtt_cmd_cb(agri_env_mqtt_cmd_cb_t cb)
+{
+    s_mqtt_cmd_cb = cb;
+}
 
 /**
  * @brief 规范化 MQTT 代理 URI
@@ -132,6 +138,9 @@ static void agri_env_mqtt_event_handler(void *handler_args, esp_event_base_t bas
                  event->topic,
                  event->data_len,
                  event->data);
+        if (s_mqtt_cmd_cb != NULL) {
+            s_mqtt_cmd_cb(event->topic, event->data, event->data_len);
+        }
     }
 }