diff --git a/APP/peripheral.c b/APP/peripheral.c
index 636b478..6dbec35 100644
--- a/APP/peripheral.c
+++ b/APP/peripheral.c
@@ -434,10 +434,18 @@ uint16_t Peripheral_ProcessEvent(uint8_t task_id, uint16_t events)
  */
 static void Peripheral_ProcessGAPMsg(gapRoleEvent_t *pEvent)
 {
+    static uint8_t LED_ALARM_Flag = 0;
     switch(pEvent->gap.opcode)
     {
         case GAP_SCAN_REQUEST_EVENT:
         {
+            LED_ALARM_Flag++;
+            if(LED_ALARM_Flag > 2)
+            {
+                LED_ALARM_OPEN;
+                DelayMs(5);
+                LED_ALARM_Flag = 0;
+            }
             // PRINT("Receive scan req from %x %x %x %x %x %x  ..\n", pEvent->scanReqEvt.scannerAddr[0],
             //       pEvent->scanReqEvt.scannerAddr[1], pEvent->scanReqEvt.scannerAddr[2], pEvent->scanReqEvt.scannerAddr[3],
             //       pEvent->scanReqEvt.scannerAddr[4], pEvent->scanReqEvt.scannerAddr[5]);