diff --git a/avr/devices/c03/test/a_c03.asm b/avr/devices/c03/test/a_c03.asm
index dae1a7d..4b7c905 100644
--- a/avr/devices/c03/test/a_c03.asm
+++ b/avr/devices/c03/test/a_c03.asm
@@ -97,6 +97,7 @@ C03App_Init:
   rcall c03AppCreateWinMenu     ; (any, !Y)
   rcall c03AppCreateWinClimate  ; (any, !Y)
   rcall c03AppCreateWinNetStats ; (any, !Y)
+  rcall c03AppCreateScreenSaver ; (any, !Y)
 
   ; enter menu window
   rcall C03App_EnterMenuWin
@@ -181,6 +182,34 @@ c03AppCreateWinNetStats_ret:
 
 
 
+; ---------------------------------------------------------------------------
+; @routine c03AppCreateScreenSaver
+;
+; @clobbers !Y
+
+c03AppCreateScreenSaver:
+  bigcall GuiApp_GetRootWindow
+  brcc c03AppCreateScreenSaver_ret
+  push yl
+    push yh
+      mov xl, r18  ; use root window as parent for main window
+      mov xh, r19
+      ldi r16, (1<<WIDGET_OPTS_INPUT_BIT) | (1<<OBJECT_OPTS_TIMER_BIT) | (1<<OBJECT_OPTS_MSGRECV_BIT)
+      ldi r17, (WIDGET_PACK_FILLED<<WIDGET_PACK_HSELF0_BIT) | (WIDGET_PACK_FILLED<<WIDGET_PACK_VSELF0_BIT) ; PACK
+      bigcall SimpleSaver_new
+      mov xl, yl
+      mov xh, yh
+    pop yh
+  pop yl
+  brcc c03AppCreateScreenSaver_ret
+  bigcall GuiApp_SetScreenSaver
+  sec
+c03AppCreateScreenSaver_ret:
+  ret
+; @end
+
+
+
 ; ---------------------------------------------------------------------------
 ; @routine c03AppSetTargetAndSelector
 ;
diff --git a/avr/devices/c03/test/main.asm b/avr/devices/c03/test/main.asm
index 508e7e8..e87e956 100644
--- a/avr/devices/c03/test/main.asm
+++ b/avr/devices/c03/test/main.asm
@@ -546,6 +546,7 @@ GUI2_MODULE_BEGIN:
 .include "modules/lcd2/gui2/base/mclayout.asm"
 .include "modules/lcd2/gui2/base/mainwindow.asm"
 .include "modules/lcd2/gui2/aqhome/sensorwatch.asm"
+.include "modules/lcd2/gui2/screensavers/simple.asm"
 GUI2_MODULE_END:
 .equ MODULE_SIZE_GUI2 = GUI2_MODULE_END-GUI2_MODULE_BEGIN
 
diff --git a/avr/modules/lcd2/gui2/screensavers/simple.asm b/avr/modules/lcd2/gui2/screensavers/simple.asm
new file mode 100644
index 0000000..2a05543
--- /dev/null
+++ b/avr/modules/lcd2/gui2/screensavers/simple.asm
@@ -0,0 +1,493 @@
+; ***************************************************************************
+; copyright   : (C) 2026 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.   *
+; ***************************************************************************
+
+#ifndef AQH_AVR_GUI_SCREENSAVER_SIMPLE_ASM
+#define AQH_AVR_GUI_SCREENSAVER_SIMPLE_ASM
+
+
+; ***************************************************************************
+; defines
+
+.equ SIMPLESAVER_TIMER100ms              =  6000 ; 10mins
+;.equ SIMPLESAVER_TIMER100ms              =  100 ; 10secs
+
+
+; widget data
+.equ SIMPLESAVER_OFFS_BEGIN     = MAINWINDOW_SIZE
+.equ SIMPLESAVER_OFFS_TIMER_LO  = SIMPLESAVER_OFFS_BEGIN+0
+.equ SIMPLESAVER_OFFS_TIMER_HI  = SIMPLESAVER_OFFS_BEGIN+1
+.equ SIMPLESAVER_OFFS_RELOAD_LO = SIMPLESAVER_OFFS_BEGIN+2
+.equ SIMPLESAVER_OFFS_RELOAD_HI = SIMPLESAVER_OFFS_BEGIN+3
+.equ SIMPLESAVER_OFFS_NODEADDR1 = SIMPLESAVER_OFFS_BEGIN+4
+.equ SIMPLESAVER_OFFS_VALUEID1  = SIMPLESAVER_OFFS_BEGIN+5
+.equ SIMPLESAVER_OFFS_NODEADDR2 = SIMPLESAVER_OFFS_BEGIN+6
+.equ SIMPLESAVER_OFFS_VALUEID2  = SIMPLESAVER_OFFS_BEGIN+7
+.equ SIMPLESAVER_SIZE           = SIMPLESAVER_OFFS_BEGIN+8
+
+
+; EEPROM data
+.equ SIMPLESAVER_EE_OFFS_NODEADDR1       = 0
+.equ SIMPLESAVER_EE_OFFS_VALUEID1        = 1
+.equ SIMPLESAVER_EE_OFFS_NODEADDR2       = 2
+.equ SIMPLESAVER_EE_OFFS_VALUEID2        = 3
+.equ SIMPLESAVER_EE_SIZE                 = 4
+
+
+
+; ***************************************************************************
+; code
+
+.cseg
+
+
+
+; ---------------------------------------------------------------------------
+; @routine SimpleSaver_new @global
+;
+; @return CFLAG set of okay, cleared otherwise
+; @return Y address of newly created object
+; @param X parent widget
+; @param r16 value for OBJECT_OFFS_OPTS
+; @param r17 value for WIDGET_OFFS_PACK
+; @clobbers any
+
+SimpleSaver_new:
+  ldi r24, LOW(SIMPLESAVER_SIZE)
+  ldi r25, HIGH(SIMPLESAVER_SIZE)
+  bigcall Object_Alloc              ; (!r16, !r17, !X)
+  brcc SimpleSaver_new_ret
+  rcall SimpleSaver_Init            ; (r16, r17, X)
+  sec
+SimpleSaver_new_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine SimpleSaver_Init @global
+;
+; @return CFLAG set of okay, cleared otherwise
+; @return Y address of newly created object
+; @param X parent widget
+; @param r16 value for OBJECT_OFFS_OPTS
+; @param r17 value for WIDGET_OFFS_PACK
+; @clobbers any
+
+SimpleSaver_Init:
+  ; call base class
+  bigcall MainWindow_Init
+
+  ; set default signal map
+  ldi r16, LOW(SimpleSaver_DefaultSignalmap*2)
+  std Y+OBJECT_OFFS_SIGNALMAP_LO, r16
+  ldi r16, HIGH(SimpleSaver_DefaultSignalmap*2)
+  std Y+OBJECT_OFFS_SIGNALMAP_HI, r16
+
+  ; set style which has no spacing and no borders
+  ldi r16, LOW(SimpleSaver_DefaultStyle*2)
+  std Y+WIDGET_OFFS_STYLE_LO, r16
+  ldi r16, HIGH(SimpleSaver_DefaultStyle*2)
+  std Y+WIDGET_OFFS_STYLE_HI, r16
+
+  ; read config from eeprom
+  rcall simpleSaverReadFromEeprom
+
+  ; preset and start timer
+  ldi r16, LOW(SIMPLESAVER_TIMER100ms)
+  ldi r17, HIGH(SIMPLESAVER_TIMER100ms)
+  std Y+SIMPLESAVER_OFFS_RELOAD_LO, r16
+  std Y+SIMPLESAVER_OFFS_RELOAD_HI, r17
+  std Y+SIMPLESAVER_OFFS_TIMER_LO, r16
+  std Y+SIMPLESAVER_OFFS_TIMER_HI, r17
+
+  ret
+; @end
+
+
+
+
+SimpleSaver_Enter:
+  bigcall Widget_GetApp
+  push yl
+    push yh
+      mov xl, yl
+      mov xh, yh
+      mov yl, r18
+      mov yh, r19
+      bigcall GuiApp_EnterWindow
+    pop yh
+  pop yl
+  
+  ret
+; @end
+
+
+
+SimpleSaver_Leave:
+  ldd r16, Y+OBJECT_OFFS_FLAGS
+  andi r16, (1<<WIDGET_FLAGS_VISIBLE_BIT)
+  breq SimpleSaver_Leave_ret                ; jump if not active
+
+  bigcall Widget_GetApp
+  push yl
+    push yh
+      mov yl, r18
+      mov yh, r19
+      bigcall GuiApp_LeaveWindow
+    pop yh
+  pop yl
+
+SimpleSaver_Leave_ret:
+  ret
+; @end
+
+
+
+SimpleSaver_KeepAlive:
+  ; restart timer
+  ldd r16, Y+SIMPLESAVER_OFFS_RELOAD_LO
+  ldd r17, Y+SIMPLESAVER_OFFS_RELOAD_HI
+  std Y+SIMPLESAVER_OFFS_TIMER_LO, r16
+  std Y+SIMPLESAVER_OFFS_TIMER_HI, r17
+  ; screen saver active?
+  ldd r16, Y+OBJECT_OFFS_FLAGS
+  andi r16, (1<<WIDGET_FLAGS_VISIBLE_BIT)
+  breq SimpleSaver_KeepAlive_ret           ; jump if not active
+  rcall SimpleSaver_Leave
+SimpleSaver_KeepAlive_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine simpleSaverWriteToEeprom
+;
+; @param Y      widget
+; @return CFLAG set if data found and read, cleared on error
+; @clobbers R16, R17, R18, R20, R21, X
+
+simpleSaverWriteToEeprom:
+  ldi r16, EEID_SCREENSAVER
+  bigcall EepromTlv_FindFirst                    ; (R18)
+  brcs simpleSaverWriteToEeprom_write
+  ldi r16, EEID_SCREENSAVER
+  ldi r17, SIMPLESAVER_EE_SIZE
+  bigcall EepromTlv_AddTlv                       ; X=pointer to EEPROM data (R16, R18, R20, R21)
+  brcc simpleSaverWriteToEeprom_ret
+simpleSaverWriteToEeprom_write:
+  push yl
+    push yh
+      adiw yh:yl, SIMPLESAVER_OFFS_NODEADDR1
+      ldi r18, SIMPLESAVER_EE_SIZE
+simpleSaverWriteToEeprom_loop:
+        ld r16, Y+
+        bigcall Eeprom_WriteByteIfChanged            ; (R17)
+        brcc simpleSaverWriteToEeprom_ret
+        adiw xh:xl, 1
+        dec r18
+      brne simpleSaverWriteToEeprom_loop
+    pop yh
+  pop yl  
+  sec
+simpleSaverWriteToEeprom_ret:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine simpleSaverReadFromEeprom
+;
+; @param Y      widget
+; @return CFLAG set if data found and read, cleared on error
+; @clobbers R16, R18, X
+
+simpleSaverReadFromEeprom:
+  ldi r16, EEID_SCREENSAVER
+  bigcall EepromTlv_FindFirst                    ; (R18)
+  brcc simpleSaverReadFromEeprom_ret
+  push yl
+    push yh
+      adiw yh:yl, SIMPLESAVER_OFFS_NODEADDR1
+      ldi r18, SIMPLESAVER_EE_SIZE
+simpleSaverReadFromEeprom_loop:
+        bigcall Eeprom_ReadByte                      ; R16=byte (none)
+        brcc simpleSaverReadFromEeprom_ret
+        st Y+, r16
+        adiw xh:xl, 1
+        dec r18
+      brne simpleSaverReadFromEeprom_loop
+    pop yh
+  pop yl  
+  sec
+simpleSaverReadFromEeprom_ret:
+  ret
+; @end
+
+
+
+
+; ***************************************************************************
+; signal handlers
+
+SimpleSaver_OnTimer:
+  ldd r16, Y+OBJECT_OFFS_FLAGS
+  andi r16, (1<<WIDGET_FLAGS_VISIBLE_BIT)
+  brne SimpleSaver_OnTimer_ret            ; jump if active
+  ; check timer
+  ldd r24, Y+SIMPLESAVER_OFFS_TIMER_LO
+  ldd r25, Y+SIMPLESAVER_OFFS_TIMER_HI
+  mov r16, r24
+  or r16, r25
+  breq SimpleSaver_OnTimer_ret
+  sbiw r25:r24, 1
+  std Y+SIMPLESAVER_OFFS_TIMER_LO, r24
+  std Y+SIMPLESAVER_OFFS_TIMER_HI, r25
+  brne SimpleSaver_OnTimer_ret
+  ; timer elapsed, enter screensaver
+  rcall SimpleSaver_Enter
+SimpleSaver_OnTimer_ret:
+  sec
+  ret
+; @end
+
+
+
+SimpleSaver_OnTouch:
+  ; read touch signal data from X
+  adiw xh:xl, WIDGET_TOUCH_OFFS_STATE
+  ld r22, X                                ; WIDGET_DATA_TOUCH_OFFS_STATE
+  sbiw xh:xl, WIDGET_TOUCH_OFFS_STATE
+
+  sbrs r22, DISPLAY_IFLAGS_PRESSED_BIT
+    rjmp SimpleSaver_OnTouch_up
+  ; down (active touch), switch display on
+  ldi r16, 0xff
+  bigcall Display_SetBacklight
+  rjmp SimpleSaver_OnTouch_ret
+SimpleSaver_OnTouch_up:
+  rcall SimpleSaver_KeepAlive
+SimpleSaver_OnTouch_ret:
+  sec
+  ret
+; @end
+
+
+
+SimpleSaver_OnMsgReceived:
+  push zl
+    push zh
+      mov yl, zl
+      mov yh, zh
+      ldi zl, LOW(SimpleSaver_MsgTable*2)
+      ldi zh, HIGH(SimpleSaver_MsgTable*2)
+      bigcall Main_HandleValueMsg           ; (any)
+    pop zh
+  pop zl
+  sec
+  ret
+; @end
+
+
+
+SimpleSaver_OnShow:
+  ; stop timer
+  clr r16
+  std Y+SIMPLESAVER_OFFS_TIMER_LO, r16
+  std Y+SIMPLESAVER_OFFS_TIMER_HI, r16
+
+  ; force redraw (black background)
+  ldd r16, Y+OBJECT_OFFS_FLAGS
+  sbr r16, (1<<WIDGET_FLAGS_DIRTY_BIT) | (1<<WIDGET_FLAGS_VISIBLE_BIT)
+  std Y+OBJECT_OFFS_FLAGS, r16
+
+  ; turn off backlight
+  clr r16
+  bigcall Display_SetBacklight
+  sec
+  ret
+; @end
+
+
+
+SimpleSaver_OnHide:
+  ldd r16, Y+OBJECT_OFFS_FLAGS
+  cbr r16, (1<<WIDGET_FLAGS_VISIBLE_BIT)
+  std Y+OBJECT_OFFS_FLAGS, r16
+  
+  ; restart timer
+  ldd r16, Y+SIMPLESAVER_OFFS_RELOAD_LO
+  ldd r17, Y+SIMPLESAVER_OFFS_RELOAD_HI
+  std Y+SIMPLESAVER_OFFS_TIMER_LO, r16
+  std Y+SIMPLESAVER_OFFS_TIMER_HI, r17
+
+  ; turn backlight on
+  ldi r16, 0xff
+  bigcall Display_SetBacklight
+  sec
+  ret
+; @end
+
+
+
+SimpleSaver_OnKeepAlive:
+  rcall SimpleSaver_KeepAlive
+  sec
+  ret
+; @end
+
+
+
+; ***************************************************************************
+; message handlers
+
+
+; ---------------------------------------------------------------------------
+; @routine simpleSaverHandleSetSource1
+;
+; @param Y       widget
+; @param R17     value id
+; @param R19:R18 value
+; @param R21:R20 denom (e.g. 100, meaning value must be divided by 100)
+; @param R22     source address
+; @param R23     command
+; @param R25:R24 message id
+; @return CFLAG  set if ACK/NACK requested
+; @return R23    command value for ACK/NACK message
+; @clobbers R16, R17, R18, R20, R21, X, Y, Z
+
+simpleSaverHandleSetSource1:
+  std Y+SIMPLESAVER_OFFS_NODEADDR1, r18
+  std Y+SIMPLESAVER_OFFS_VALUEID1, r19
+  rcall simpleSaverWriteToEeprom           ; (R16, R17, R18, R20, R21, X, Y)
+  ldi r23, NETMSG_CMD_VALUE_SET_ACK
+  sec
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine simpleSaverHandleSetSource2
+;
+; @param Y       widget
+; @param R17     value id
+; @param R19:R18 value
+; @param R21:R20 denom (e.g. 100, meaning value must be divided by 100)
+; @param R22     source address
+; @param R23     command
+; @param R25:R24 message id
+; @return CFLAG  set if ACK/NACK requested
+; @return R23    command value for ACK/NACK message
+; @clobbers R16, R17, R18, R20, R21, X, Y, Z
+
+simpleSaverHandleSetSource2:
+  std Y+SIMPLESAVER_OFFS_NODEADDR1, r18
+  std Y+SIMPLESAVER_OFFS_VALUEID1, r19
+  rcall simpleSaverWriteToEeprom           ; (R16, R17, R18, R20, R21, X, Y)
+  ldi r23, NETMSG_CMD_VALUE_SET_ACK
+  sec
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine simpleSaverHandleReport
+;
+; @param Y       widget
+; @param R17     value id
+; @param R19:R18 value
+; @param R21:R20 denom (e.g. 100, meaning value must be divided by 100)
+; @param R22     source address
+; @param R23     command
+; @param R25:R24 message id
+; @return CFLAG  cleared (no ACK/NACK requested)
+; @clobbers any
+
+simpleSaverHandleReport:
+  mov r16, r18                             ; check for non-zero value
+  or r16, r19
+  breq simpleSaverHandleReport_end
+  ldd r16, Y+SIMPLESAVER_OFFS_NODEADDR1
+  cp r16, r22
+  brne simpleSaverHandleReport_l1
+  ldd r16, Y+SIMPLESAVER_OFFS_VALUEID1
+  cp r16, r17
+  breq simpleSaverHandleReport_matches
+
+simpleSaverHandleReport_l1:
+  ldd r16, Y+SIMPLESAVER_OFFS_NODEADDR2
+  cp r16, r22
+  brne simpleSaverHandleReport_end
+  ldd r16, Y+SIMPLESAVER_OFFS_VALUEID2
+  cp r16, r17
+  brne simpleSaverHandleReport_end
+simpleSaverHandleReport_matches:
+  rcall SimpleSaver_KeepAlive
+simpleSaverHandleReport_end:
+  clc                                      ; no ACK needed
+  ret
+; @end
+
+
+
+
+
+; ***************************************************************************
+; data in FLASH
+
+SimpleSaver_DefaultStyle:
+  .dw DISPLAY_COLOR_LIGHTGREY  ; frontCol_norm
+  .dw DISPLAY_COLOR_BLACK      ; backCol_norm
+  .dw DISPLAY_COLOR_BLACK      ; borderCol_norm
+  .dw DISPLAY_COLOR_WHITE      ; shadowCol_norm
+  
+  .dw DISPLAY_COLOR_WHITE      ; frontCol_activated
+  .dw DISPLAY_COLOR_NAVY       ; backCol_activated
+  .dw DISPLAY_COLOR_BLACK      ; borderCol_activated
+  .dw DISPLAY_COLOR_WHITE      ; shadowCol_activated
+  
+  .db 0, 1                     ; outerBorderSize, innerBorderSize
+  .dw ili9341Font12x16_1*2     ; font
+  .db 12, 16                   ; charWidth, charHeight
+
+
+
+SimpleSaver_MsgTable:
+  .dw NETMSG_CMD_VALUE_SET | (VALUE_ID_SCREENSAVER_SETSOURCE1<<8), simpleSaverHandleSetSource1
+  .dw NETMSG_CMD_VALUE_SET | (VALUE_ID_SCREENSAVER_SETSOURCE2<<8), simpleSaverHandleSetSource2
+  .dw NETMSG_CMD_VALUE_REPORT,                                     simpleSaverHandleReport
+  .dw 0, 0
+
+
+
+SimpleSaver_DefaultSignalmap:
+  ; header
+  .dw MainWindow_DefaultSignalmap*2  ; next table to use
+  ; entries
+  .db 0, OBJECT_SIGNAL_TIMER,     LOW(SimpleSaver_OnTimer),       HIGH(SimpleSaver_OnTimer)
+  .db 0, WIDGET_SIGNAL_KEEPALIVE, LOW(SimpleSaver_OnKeepAlive),   HIGH(SimpleSaver_OnKeepAlive)
+  .db 0, WIDGET_SIGNAL_SHOW,      LOW(SimpleSaver_OnShow),        HIGH(SimpleSaver_OnShow)
+  .db 0, WIDGET_SIGNAL_HIDE,      LOW(SimpleSaver_OnHide),        HIGH(SimpleSaver_OnHide)
+  .db 0, WIDGET_SIGNAL_TOUCH,     LOW(SimpleSaver_OnTouch),       HIGH(SimpleSaver_OnTouch)
+  .db 0, OBJECT_SIGNAL_RECVMSG,   LOW(SimpleSaver_OnMsgReceived), HIGH(SimpleSaver_OnMsgReceived)
+  .db 0, WIDGET_SIGNAL_DRAW,      LOW(Widget_OnDraw),             HIGH(Widget_OnDraw)
+
+  .db 0, 0, 0, 0  ; end of table
+
+
+
+
+#endif
+
+
+