diff --git a/avr/att84_bootloader.asm b/avr/att84_bootloader.asm
index d33e972..6cf6f44 100644
--- a/avr/att84_bootloader.asm
+++ b/avr/att84_bootloader.asm
@@ -135,13 +135,14 @@ main:
 .include "modules/com2/crc.asm"
 .include "modules/com2/packets.asm"
 .include "common/crc8.asm"
-.include "modules/flash/main.asm"
-.include "modules/flash/proto.asm"
+.include "modules/flash/bootloader.asm"
+.include "modules/flash/flash.asm"
 .include "modules/flash/recv.asm"
 .include "modules/flash/send.asm"
 .include "modules/flash/wait.asm"
 .include "modules/flash/hdl_flash_start.asm"
 .include "modules/flash/hdl_flash_data.asm"
+.include "modules/flash/hdl_flash_end.asm"
 .include "modules/flash/flash_rsp.asm"
 .include "modules/flash/flash_ready.asm"
 
diff --git a/avr/modules/flash/proto.asm b/avr/modules/flash/bootloader.asm
similarity index 93%
rename from avr/modules/flash/proto.asm
rename to avr/modules/flash/bootloader.asm
index d4227ae..9133582 100644
--- a/avr/modules/flash/proto.asm
+++ b/avr/modules/flash/bootloader.asm
@@ -101,14 +101,20 @@ bootLoader:
   
   ; try to start firmware
 bootLoader_startFirmware:
-  sbi PORTA, PORTA3 ; LED off
-
-  ldi r16, 20
+  cbi PORTA, PORTA3             ; LED on
+  ldi r16, 10
   rcall flashWaitForMulti100ms
+  sbi PORTA, PORTA3             ; LED off
+  ldi r16, 3
+  rcall flashWaitForMulti100ms
+  cbi PORTA, PORTA3             ; LED on
+  ldi r16, 10
+  rcall flashWaitForMulti100ms
+  sbi PORTA, PORTA3             ; LED off
   rjmp firmwareStart
 
 bootLoader_waitAndRestartBootLoader:
-  sbi PORTA, PORTA3 ; LED off
+  sbi PORTA, PORTA3             ; LED off
   ldi r16, 20
   rcall flashWaitForMulti100ms
   rjmp bootLoader
@@ -170,6 +176,8 @@ bootLoaderFlash_loop1:
     rcall flashHandleFlashData
   rjmp bootLoaderFlash_loop1
 
+bootLoaderFlash_endReceived:
+  rjmp flashHandleFlashEnd
 
 
 
diff --git a/avr/modules/flash/main.asm b/avr/modules/flash/flash.asm
similarity index 100%
rename from avr/modules/flash/main.asm
rename to avr/modules/flash/flash.asm
diff --git a/avr/modules/flash/hdl_flash_end.asm b/avr/modules/flash/hdl_flash_end.asm
new file mode 100644
index 0000000..dd4f0ab
--- /dev/null
+++ b/avr/modules/flash/hdl_flash_end.asm
@@ -0,0 +1,38 @@
+; ***************************************************************************
+; copyright   : (C) 2023 by Martin Preuss
+; email       : martin@libchipcard.de
+;
+; ***************************************************************************
+; * This file is part of the project "AqHome".                              *
+; * Please see toplevel file COPYING of that project for license details.   *
+; ***************************************************************************
+
+
+
+; ***************************************************************************
+; code
+
+
+.cseg
+
+
+
+
+; ---------------------------------------------------------------------------
+; Handle FLASH END packet.
+;
+; IN:
+; - X  : buffer containing the message
+; OUT:
+; - CFLAG: set if message is for us, cleared otherwise
+; REGS: r16, r18. r19. r20, r21, X (R15, R17, R22)
+
+flashHandleFlashEnd:
+  rcall flashWaitFor100ms
+  clr r16
+  rcall flashSendFlashResponse             ; (R15, R16, R17, R18, R19, R20, R21, R22, X)
+  sec
+  ret
+
+
+