diff --git a/ESP-IDF_Robot/main/blink_example_main.c b/ESP-IDF_Robot/main/blink_example_main.c
index 60f3f90a5..5aa8866da 100644
--- a/ESP-IDF_Robot/main/blink_example_main.c
+++ b/ESP-IDF_Robot/main/blink_example_main.c
@@ -68,8 +68,8 @@ TIMER RESOLUTION    MAX VALUE   HALF-DUTY
 #define BLINK_GPIO      CONFIG_BLINK_GPIO       // 10 GPIO of on-board LED
 #define PUSH_BTN_GPIO   CONFIG_BUTTON_GPIO      // 3 GPIO of on-board push-button
 #define MTR_FL_GPIO     0 //CONFIG_MOTOR_FRONT_LEFT_GPIO
-#define PROJ_X          (4)                     // 4 GPIO joystick, x-axis
-#define PROJ_Y          (6)                     // 6 GPIO joystick, y-axis
+#define PROJ_X          (4)                     // ADC1_CH4; 4 GPIO joystick, x-axis
+#define PROJ_Y          (5)                     // ADC2_CH0; 5 GPIO joystick, y-axis
 #define NAV_BTN         (8)                     // 8 GPIO joystick button
 
 #define ESP_INTR_FLAG_DEFAULT 0