diff --git a/ESP-IDF_Robot/main/mqtt.h b/ESP-IDF_Robot/main/mqtt.h
index bb4b023d6..2b0a14003 100644
--- a/ESP-IDF_Robot/main/mqtt.h
+++ b/ESP-IDF_Robot/main/mqtt.h
@@ -10,8 +10,10 @@
 #define WIFI_PASSWORD "208208208"
 static const char* MQTT_BROKER_URI;
 static const char* MQTT_TAG;
+static esp_mqtt_client_handle_t mqtt_client;;
 
 static void mqtt_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data);
+static void mqtt_publish_task(void *arg);
 void mqtt_app_start(void);
 void mqtt_publish(void);
 void sta_wifi_init(void);