diff --git a/Application/Tasks/Headlight_can.c b/Application/Tasks/Headlight_can.c
index 8bac6d9..8bb8055 100644
--- a/Application/Tasks/Headlight_can.c
+++ b/Application/Tasks/Headlight_can.c
@@ -20,6 +20,7 @@ typedef struct Headlight_Control_Setting {
     uint16_t off_threshold;
 } Headlight_Control_Setting_t;
 
+// whan a message is received, this function is called
 void DataClbk_cls_headlight_Settings(void* msg, uint32_t length) {
     DATA_CLBK_SETUP(cls_headlight_Settings);
     uint8_t device = msg_cls_headlight_Settings.deviceId;