diff --git a/ESP-IDF_Robot/main/rc.h b/ESP-IDF_Robot/main/rc.h
index c4e1481dc..fcd000955 100644
--- a/ESP-IDF_Robot/main/rc.h
+++ b/ESP-IDF_Robot/main/rc.h
@@ -74,6 +74,7 @@ static void rc_get_raw_data() {
         m.motor1_rpm_pcm = 0;
         m.motor2_rpm_pcm = 0;
     }
+    // LEFT or RIGHT
     if (rescale_raw_val(adc_raw[0][0]) >= 4000) {
         m.motor1_rpm_pcm = rescale_raw_val(adc_raw[0][0]);
     }