diff --git a/avr/modules/0BUILD b/avr/modules/0BUILD
index 781cd54..7c9081f 100644
--- a/avr/modules/0BUILD
+++ b/avr/modules/0BUILD
@@ -14,7 +14,9 @@
     flash
     lcd
     led
+    led_activity
     led_simple
+    led_signal
     ma_light
     motion
     owimaster
diff --git a/avr/modules/led_activity/0BUILD b/avr/modules/led_activity/0BUILD
new file mode 100644
index 0000000..febd367
--- /dev/null
+++ b/avr/modules/led_activity/0BUILD
@@ -0,0 +1,11 @@
+<?xml?>
+
+<gwbuild>
+
+  <extradist>
+    main.asm
+  </extradist>
+
+</gwbuild>
+
+
diff --git a/avr/modules/led_activity/main.asm b/avr/modules/led_activity/main.asm
new file mode 100644
index 0000000..091e079
--- /dev/null
+++ b/avr/modules/led_activity/main.asm
@@ -0,0 +1,90 @@
+; ***************************************************************************
+; copyright   : (C) 2025 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.   *
+; ***************************************************************************
+
+
+.equ LED_ACTIVITY_TIME = 2
+
+
+
+; ***************************************************************************
+; data
+
+.dseg
+
+ledActivityTimer:      .byte 1
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+LED_ACTIVITY_BEGIN:
+
+
+
+; ---------------------------------------------------------------------------
+; LedActivity_Init
+;
+; @return CFLAG: set if okay, clear on error
+; USED: R1, R2, R3, R4, R16, R17, X
+
+LedActivity_Init:
+  sbi LED_ACTIVITY_DDR, LED_ACTIVITY_PINNUM  ; out
+  ldi r16, 50
+  sts ledActivityTimer, r16                  ; keep on for 5s at the beginning
+  sec
+  ret
+
+
+
+; ---------------------------------------------------------------------------
+; @routine LedActivity_Every100ms @global
+;
+; @clobbers r16, r17
+
+LedActivity_Every100ms:
+  lds r16, ledActivityTimer
+  tst r16
+  breq LedActivity_Every100ms_ret
+  dec r16
+  sts ledActivityTimer, r16
+  brne LedActivity_Every100ms_ret
+  sbi LED_ACTIVITY_PORT, LED_ACTIVITY_PINNUM ; turn LED off
+LedActivity_Every100ms_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine LedActivity_Restart @global
+;
+; @clobbers r16
+
+LedActivity_Trigger:
+  lds r16, ledActivityTimer
+  tst r16
+  brne LedActivity_Trigger_ledIsOn
+  cbi LED_ACTIVITY_PORT, LED_ACTIVITY_PINNUM ; turn LED on
+LedActivity_Trigger_ledIsOn:
+  ldi r16, LED_ACTIVITY_TIME
+  sts ledActivityTimer, r16
+  ret
+; @end
+
+
+
+
+LED_ACTIVITY_END:
+.equ MODULE_SIZE_LED_ACTIVITY = LED_ACTIVITY_END-LED_ACTIVITY_BEGIN
+
+
+
diff --git a/avr/modules/led_signal/0BUILD b/avr/modules/led_signal/0BUILD
new file mode 100644
index 0000000..febd367
--- /dev/null
+++ b/avr/modules/led_signal/0BUILD
@@ -0,0 +1,11 @@
+<?xml?>
+
+<gwbuild>
+
+  <extradist>
+    main.asm
+  </extradist>
+
+</gwbuild>
+
+
diff --git a/avr/modules/led_signal/main.asm b/avr/modules/led_signal/main.asm
new file mode 100644
index 0000000..8475d01
--- /dev/null
+++ b/avr/modules/led_signal/main.asm
@@ -0,0 +1,156 @@
+; ***************************************************************************
+; copyright   : (C) 2025 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.   *
+; ***************************************************************************
+
+
+
+; ***************************************************************************
+; data
+
+.dseg
+
+ledSignalTimer:      .byte 1
+ledSignalFlags:      .byte 1
+ledSignalRunFlags:   .byte 1
+ledSignalBitCounter: .byte 1
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+LED_SIGNAL_BEGIN:
+
+
+
+; ---------------------------------------------------------------------------
+; LedSignal_Init
+;
+; @return CFLAG: set if okay, clear on error
+; USED: R1, R2, R3, R4, R16, R17, X
+
+LedSignal_Init:
+  sbi LED_SIGNAL_DDR, LED_SIGNAL_PINNUM  ; out
+  clr r16
+  sts ledSignalFlags, r16
+  ldi r16, 100
+  sts ledSignalTimer, r16
+  sec
+  ret
+
+
+
+; ---------------------------------------------------------------------------
+; @routine LedSignal_Every100ms @global
+;
+; @clobbers r16, r17
+
+LedSignal_Every100ms:
+  lds r16, ledSignalTimer
+  dec r16
+  breq LedSignal_Every100ms_timer0
+  sts ledSignalTimer, r16
+  cpi r16, 80
+  brcs LedSignal_Every100ms_checkBit
+  brne LedSignal_Every100ms_ret
+  rcall LedSignal_Restart                ; (r16, r17)
+  rjmp LedSignal_Every100ms_ret
+LedSignal_Every100ms_checkBit:
+  lds r17, ledSignalRunFlags
+  andi r17, 1
+  brne LedSignal_Every100ms_bit1
+LedSignal_Every100ms_bit0:
+  cpi r16, 8
+  breq LedSignal_Every100ms_ledOff
+  rjmp LedSignal_Every100ms_ret
+LedSignal_Every100ms_bit1:
+  cpi r16, 3
+  breq LedSignal_Every100ms_ledOff
+  rjmp LedSignal_Every100ms_ret
+LedSignal_Every100ms_ledOff:
+  sbi LED_SIGNAL_PORT, LED_SIGNAL_PINNUM ; off
+  rjmp LedSignal_Every100ms_ret
+LedSignal_Every100ms_timer0:
+  lds r17, ledSignalBitCounter
+  dec r17
+  brne LedSignal_Every100ms_nextBit
+  ldi r17, 100
+  sts ledSignalTimer, r17
+  rjmp LedSignal_Every100ms_ret
+LedSignal_Every100ms_nextBit:
+  sts ledSignalBitCounter, r17
+  lds r16, ledSignalRunFlags
+  lsr r16
+  sts ledSignalRunFlags, r16
+  ldi r16, 10
+  sts ledSignalTimer, r16
+  cbi LED_SIGNAL_PORT, LED_SIGNAL_PINNUM ; on
+LedSignal_Every100ms_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine LedSignal_Restart @global
+;
+; @clobbers r16, r17
+
+LedSignal_Restart:
+  ldi r16, 8
+  sts ledSignalBitCounter, r16
+  ldi r16, 10
+  sts ledSignalTimer, r16
+  lds r16, ledSignalFlags
+  sts ledSignalRunFlags, r16
+  cbi LED_SIGNAL_PORT, LED_SIGNAL_PINNUM ; on
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine LedSignal_SetFlag @global
+;
+; @param r16 flag mask
+; @clobbers r17
+
+LedSignal_SetFlag:
+  lds r17, ledSignalFlags
+  or r17, r16
+  sts ledSignalFlags, r17
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine LedSignal_ClrFlag @global
+;
+; @param r16 flag mask
+; @clobbers r17
+
+LedSignal_ClrFlag:
+  lds r17, ledSignalFlags
+  com r16
+  and r17, r16
+  com r16
+  sts ledSignalFlags, r17
+  ret
+; @end
+
+
+
+
+LED_SIGNAL_END:
+.equ MODULE_SIZE_LED_SIGNAL = LED_SIGNAL_END-LED_SIGNAL_BEGIN
+
+
+