diff --git a/ESP-IDF_Robot/main/blink_example_main.c b/ESP-IDF_Robot/main/blink_example_main.c
index 9e0ca160c..88729801d 100644
--- a/ESP-IDF_Robot/main/blink_example_main.c
+++ b/ESP-IDF_Robot/main/blink_example_main.c
@@ -382,7 +382,7 @@ void app_main(void)
     buf.motor1_rpm_pcm = 0;
     wifi_init();
     esp_now_init();
-    esp_now_register_recv_cb(onDataReceived);
+    esp_now_register_recv_cb(onDataReceived);   // Callback function for receiving data
 
     /*
         ADC