diff --git a/ESP-IDF_Robot/main/blink_example_main.c b/ESP-IDF_Robot/main/blink_example_main.c
index d16539fbd..aab67290a 100644
--- a/ESP-IDF_Robot/main/blink_example_main.c
+++ b/ESP-IDF_Robot/main/blink_example_main.c
@@ -70,7 +70,7 @@ TIMER RESOLUTION    MAX VALUE   HALF-DUTY
 #define PUSH_BTN_GPIO   CONFIG_BUTTON_GPIO      // 3 GPIO of on-board push-button
 #define MTR_FL_GPIO     0 //CONFIG_MOTOR_FRONT_LEFT_GPIO
 // ADC
-#define ADC_ATTEN       ADC_ATTEN_DB_6
+#define ADC_ATTEN       ADC_ATTEN_DB_0
 #define ADC_BIT_WIDTH   SOC_ADC_DIGI_MAX_BITWIDTH
 #define ADC_UNIT        ADC_UNIT_1
 #define ADC_CONV_MODE   ADC_CONV_BOTH_UNIT// ADC_CONV_SINGLE_UNIT_1