diff --git a/avr/devices/0BUILD b/avr/devices/0BUILD
index 8dad59d..938763a 100644
--- a/avr/devices/0BUILD
+++ b/avr/devices/0BUILD
@@ -30,6 +30,7 @@
     n22
     n23
     n24
+    n25
     t03
   </subdirs>
 
diff --git a/avr/devices/n25/.gitignore b/avr/devices/n25/.gitignore
new file mode 100644
index 0000000..8e0618c
--- /dev/null
+++ b/avr/devices/n25/.gitignore
@@ -0,0 +1,2 @@
+*.eep.hex
+*.obj
diff --git a/avr/devices/n25/0BUILD b/avr/devices/n25/0BUILD
new file mode 100644
index 0000000..be449f6
--- /dev/null
+++ b/avr/devices/n25/0BUILD
@@ -0,0 +1,17 @@
+<?xml?>
+
+<gwbuild>
+
+  <subdirs>
+    boot
+    main
+  </subdirs>
+
+  <extradist>
+    defs.asm
+    README
+  </extradist>
+  
+
+</gwbuild>
+
diff --git a/avr/devices/n25/README b/avr/devices/n25/README
new file mode 100644
index 0000000..131998f
--- /dev/null
+++ b/avr/devices/n25/README
@@ -0,0 +1,13 @@
+
+N22
+===
+
+- Role: LED strip controller
+- MCU: AtTiny85
+- Connection: RJ45
+- Periphery:
+  - LED strip connection (SK6812)
+  - OWI interface
+    - DS18B20 temperature sensor
+- Modules:
+  - MA_LIGHT: motion activated light
diff --git a/avr/devices/n25/boot/0BUILD b/avr/devices/n25/boot/0BUILD
new file mode 100644
index 0000000..068003c
--- /dev/null
+++ b/avr/devices/n25/boot/0BUILD
@@ -0,0 +1,32 @@
+<?xml?>
+
+<gwbuild>
+
+  <target type="AvrHexFile" name="n22_boot" >
+
+    <includes type="avrasm" >
+      -I $(builddir)
+      -I $(srcdir)
+      -I $(topsrcdir)/avr
+      -I $(topbuilddir)/avr
+    </includes>
+
+
+    <sources type="avrasm" >
+      boot.asm
+    </sources>
+
+
+  </target>
+
+
+  <subdirs>
+  </subdirs>
+
+  <extradist>
+  </extradist>
+  
+
+</gwbuild>
+
+
diff --git a/avr/devices/n25/boot/boot.asm b/avr/devices/n25/boot/boot.asm
new file mode 100644
index 0000000..6d8619f
--- /dev/null
+++ b/avr/devices/n25/boot/boot.asm
@@ -0,0 +1,138 @@
+; ***************************************************************************
+; Source file for base system node on AtTiny 84
+;
+; This is for the maintenance system (i.e. the flash loader).
+;
+; All definitions and changes should go into this file.
+;
+;
+; ***************************************************************************
+
+.equ clock=1000000 ; Define the clock frequency
+
+.nolist
+.include "include/tn84def.inc" ; Define device ATtiny84
+.list
+
+.include "../defs.asm"
+.include "defs_all.asm"
+
+
+
+; ***************************************************************************
+; defines
+
+; ---------------------------------------------------------------------------
+; generic
+
+.include "common/utils_wait.asm"
+.include "modules/com2/defs.asm"
+.include "modules/comproto/defs.asm"
+
+
+; ---------------------------------------------------------------------------
+; firmware settings
+
+.equ FIRMWARE_VERSION_MAJOR       = 0
+.equ FIRMWARE_VERSION_MINOR       = 0
+.equ FIRMWARE_VERSION_PATCHLEVEL  = 1
+
+
+; ---------------------------------------------------------------------------
+; LED
+
+.equ LED_DDR             = DDRA
+.equ LED_PORT            = PORTA
+.equ LED_PIN             = PINA
+.equ LED_PINNUM          = PORTA3
+
+
+
+; ***************************************************************************
+; code segment
+
+.cseg
+.org 0x0000
+
+
+
+; ---------------------------------------------------------------------------
+; Reset and interrupt vectors
+  rjmp main ; Reset vector
+  reti ; EXT_INT0
+  reti ; PCI0
+  reti ; OC1A
+  reti ; OVF1
+  reti ; OVF0
+  reti ; ERDY
+  reti ; ACI
+  reti ; ADCC
+  reti ; OC1B
+  reti ; OC0A
+  reti ; OC0B
+  reti ; WATCHDOG
+  reti ; USI_STR
+  reti ; USI_OVF
+
+devInfoBlock:        ; 12 bytes
+devInfoManufacturer: .db 'A', 'Q', 'U', 'A'
+devInfoId:           .db DEVICEINFO_ID, 0
+devInfoVersion:      .db DEVICEINFO_VERSION, DEVICEINFO_REVISION             ; version, revision
+firmwareVersion:     .db FIRMWARE_VARIANT_BOOT, FIRMWARE_VERSION_MAJOR
+                     .db FIRMWARE_VERSION_MINOR, FIRMWARE_VERSION_PATCHLEVEL
+
+firmwareStart:   rjmp main ; will be overwritten when flashing
+
+
+
+; ***************************************************************************
+; main code
+
+
+.org BOOTLOADER_ADDR
+
+
+main:
+  rjmp bootLoader ; this routine is in modules/bootloader/main.asm
+
+
+
+; ***************************************************************************
+; includes
+
+.include "common/utils_wait_fixed.asm"
+.include "common/utils_copy_from_flash.asm"
+.include "common/utils_copy_sdram.asm"
+
+.include "modules/flash/defs.asm"
+.include "modules/flash/eeprom.asm"
+.include "modules/flash/io.asm"
+.include "modules/flash/io_attn.asm"
+.include "modules/flash/io_bitbang.asm"
+.include "modules/flash/flashxp.asm"
+.include "modules/flash/flash1p.asm"
+.include "modules/flash/flashprocess.asm"
+.include "modules/flash/wait.asm"
+.include "modules/bootloader/main.asm"
+.include "modules/network/msg/defs.asm"
+.include "modules/network/msg/crc.asm"
+
+
+
+systemSetSpeed:
+.if clock == 8000000
+  ldi r16, (1<<CLKPCE)
+  ldi r17, 0
+  out CLKPR, r16
+  out CLKPR, r17
+.endif
+
+.if clock == 1000000
+  ldi r16, (1<<CLKPCE)
+  ldi r17, (1<<CLKPS1) | (1<<CLKPS0)
+  out CLKPR, r16
+  out CLKPR, r17
+.endif
+  ret
+
+
diff --git a/avr/devices/n25/defs.asm b/avr/devices/n25/defs.asm
new file mode 100644
index 0000000..093348b
--- /dev/null
+++ b/avr/devices/n25/defs.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.   *
+; ***************************************************************************
+
+; ***************************************************************************
+;
+;                                 AtTiny84
+;                                 --------
+;                            VCC  1     14  GND
+;                  OWI       PB0  2     13  PA0
+;                            PB1  3     12  PA1  COM-DATA
+;                            PB3  4     11  PA2         
+;                            PB2  5     10  PA3  LED
+;                  COM_ATTN  PA7  6      9  PA4  LED_CLK
+;                  LED_DATA  PA6  7      8  PA5
+;                                 --------
+;
+; ***************************************************************************
+
+
+
+.equ BOOTLOADER_ADDR = 0xd00
+
+
+.equ FIRMWARE_VARIANT_BOOT        = 0
+.equ FIRMWARE_VARIANT_LEDSTRIPS   = 1
+
+.equ DEVICEINFO_ID       = 'N'
+.equ DEVICEINFO_VERSION  = 25
+.equ DEVICEINFO_REVISION = 0
+
+
+; ---------------------------------------------------------------------------
+; LED module
+
+.equ LED_SIMPLE_ONTIME  = 1
+.equ LED_SIMPLE_OFFTIME = 50
+.equ LED_SIMPLE_DDR     = DDRA
+.equ LED_SIMPLE_PORT    = PORTA
+.equ LED_SIMPLE_PORTIN  = PINA
+.equ LED_SIMPLE_PINNUM  = PORTA3
+
+
+
+; ---------------------------------------------------------------------------
+; COM module
+
+.equ COM_BIT_LENGTH      = 52000 ; 104000ns=9600, 52000ns=19200, 26000ns=38400
+.equ COM_HALFBIT_LENGTH  = 26000 ; see https://de.wikipedia.org/wiki/Universal_Asynchronous_Receiver_Transmitter
+
+.equ COM_DATA_DDR       = DDRA
+.equ COM_DATA_INPUT     = PINA
+.equ COM_DATA_OUTPUT    = PORTA
+.equ COM_DATA_PIN       = PORTA1
+
+.equ COM_ATTN_DDR       = DDRA
+.equ COM_ATTN_INPUT     = PINA
+.equ COM_ATTN_OUTPUT    = PORTA
+.equ COM_ATTN_PIN       = PORTA7
+
+.equ COM_IRQ_ADDR_ATTN   = PCMSK0
+.equ COM_IRQ_BIT_ATTN    = PCINT7       ; bit 7 in PCMSK0 (PCINT7)
+.equ COM_IRQ_GIFR_ATTN   = PCIF0
+.equ COM_IRQ_GIMSK_ATTN  = PCIE0
+
+
+
+; ---------------------------------------------------------------------------
+; 1-Wire Master
+;
+
+.equ OWI_DDR     = DDRB
+.equ OWI_PORTOUT = PORTB
+.equ OWI_PORTIN  = PINB
+.equ OWI_PINNUM  = PORTB0
+
+
+; ---------------------------------------------------------------------------
+; SK6812
+
+.equ SK6812_DDR    = DDRA
+.equ SK6812_PORT   = PORTA
+.equ SK6812_PINNUM = PORTA6
+
+
diff --git a/avr/devices/n25/main/0BUILD b/avr/devices/n25/main/0BUILD
new file mode 100644
index 0000000..38ed80d
--- /dev/null
+++ b/avr/devices/n25/main/0BUILD
@@ -0,0 +1,33 @@
+<?xml?>
+
+<gwbuild>
+
+  <target type="AvrHexFile" name="n22_firmware" >
+
+    <includes type="avrasm" >
+      -I $(builddir)
+      -I $(srcdir)
+      -I $(topsrcdir)/avr
+      -I $(topbuilddir)/avr
+    </includes>
+
+
+    <sources type="avrasm" >
+      main.asm
+    </sources>
+
+
+  </target>
+
+
+
+  <subdirs>
+  </subdirs>
+
+  <extradist>
+  </extradist>
+  
+
+</gwbuild>
+
+
diff --git a/avr/devices/n25/main/main.asm b/avr/devices/n25/main/main.asm
new file mode 100644
index 0000000..27011b0
--- /dev/null
+++ b/avr/devices/n25/main/main.asm
@@ -0,0 +1,208 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+
+; ***************************************************************************
+; Source file for LED controller node on AtTiny 84
+;
+; This is for the full system (i.e. not the boot loader).
+; ***************************************************************************
+
+.equ clock=8000000 ; Define the clock frequency
+
+
+
+.nolist
+.include "include/tn84def.inc" ; Define device ATtiny84
+.list
+
+.include "../defs.asm"
+;.include "./data.asm"
+
+.include "devices/all/defs.asm"
+.include "common/utils_wait.asm"
+
+
+
+; ***************************************************************************
+; defines
+
+; ---------------------------------------------------------------------------
+; generic
+
+.equ NET_BUFFERS_NUM            = 6
+.equ NET_BUFFERS_SIZE           = 32
+
+
+
+; ---------------------------------------------------------------------------
+; firmware settings including list of modules used
+
+.equ FIRMWARE_VERSION_MAJOR       = 0
+.equ FIRMWARE_VERSION_MINOR       = 0
+.equ FIRMWARE_VERSION_PATCHLEVEL  = 1
+
+
+#define MODULES_CLOCK
+#define MODULES_LED_SIMPLE
+#define MODULES_NETWORK
+#define MODULES_UART_BITBANG
+#define MODULES_OWI_MASTER
+#define MODULES_DS18B20
+#define MODULES_SK6812
+;#define MODULES_MOTION_LIGHT
+
+#define APPS_NETWORK
+#define APPS_REPORTSENSORS
+#define APPS_STATS
+#define APPS_MA_LIGHT
+
+
+
+; ---------------------------------------------------------------------------
+; defines for modules
+
+;.equ VALUE_ID_SI7021_TEMP    = 0x01
+;.equ VALUE_ID_SI7021_HUM     = 0x02
+
+;.equ VALUE_ID_ADC            = 0x03
+;.equ VALUE_ID_REED1          = 0x04
+;.equ VALUE_ID_REED2          = 0x05
+.equ VALUE_ID_DS18B20_TEMP    = 0x06
+
+;.equ VALUE_ID_REED_CONF      = 0x81
+.equ VALUE_ID_LED_NUMLEDS      = 0x82
+.equ VALUE_ID_LED_RGBW_VALUE   = 0x83
+.equ VALUE_ID_MAL_RGBW_VALUE   = 0x84
+.equ VALUE_ID_MAL_ONTIME       = 0x85
+.equ VALUE_ID_MAL_SOURCE1      = 0x86
+.equ VALUE_ID_MAL_SOURCE2      = 0x87
+
+.equ VALUE_ID_LEDSIMPLE_TIMING = 0x88
+
+
+; ***************************************************************************
+; code segment
+
+.cseg
+.org 000000
+
+
+
+; ---------------------------------------------------------------------------
+; Reset and interrupt vectors
+
+        rjmp BOOTLOADER_ADDR ; Reset vector  ; use this for flashed system
+	reti ; EXT_INT0
+	rjmp UART_BitBang_PcintIsr ; PCI0
+	reti ; OC1A
+	reti ; OVF1
+	reti ; OVF0
+	reti ; ERDY
+	reti ; ACI
+        reti ; ADCC
+	reti ; OC1B
+        rjmp baseTimerIrqOC0A ; OC0A
+	reti ; OC0B
+	reti ; WATCHDOG
+	reti ; USI_STR
+	reti ; USI_OVF
+
+
+devInfoBlock:        ; 12 bytes
+devInfoManufacturer: .db 'A', 'Q', 'U', 'A'
+devInfoId:           .db DEVICEINFO_ID, 0
+devInfoVersion:      .db DEVICEINFO_VERSION, DEVICEINFO_REVISION             ; version, revision
+firmwareVersion:     .db FIRMWARE_VARIANT_LEDSTRIPS, FIRMWARE_VERSION_MAJOR
+                     .db FIRMWARE_VERSION_MINOR, FIRMWARE_VERSION_PATCHLEVEL
+
+; ---------------------------------------------------------------------------
+; @routine firmwareStart @global
+
+firmwareStart:
+  rjmp main
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine onSystemStart
+
+onSystemStart:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine onMessageReceived
+;
+; Called on every message received
+
+onMessageReceived:
+  clc
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine onEvery100ms
+;
+; Called every 100ms. Add your routine calls here. No arguments, no results.
+
+onEvery100ms:
+onEveryMinute:
+onEveryHour:
+onEveryDay:
+  ret
+; @end
+
+onEverySecond:
+  ret
+  ; debug
+  ldi r19, 0x00           ; G
+  ldi r18, 0xff           ; R
+  ldi r20, 0x55           ; B
+  ldi r21, 0xaa           ; W
+  rcall SK6812_SetAllColor ; r23 (r16, r17)
+  ret
+
+
+
+; ---------------------------------------------------------------------------
+; @routine onEveryLoop
+;
+; Called on every loop (i.e. after awakening from sleep).
+;
+onEveryLoop:
+  ret
+; @end
+
+
+
+
+
+; ***************************************************************************
+; includes
+
+.include "devices/all/hw_tn84.asm"
+.include "devices/all/includes.asm"
+.include "common/debug.asm"
+
+
+
+; ---------------------------------------------------------------------------
+; defines for network interface
+
+.equ netInterfaceData = uart_bitbang_iface
+
+
+
+