diff --git a/avr/devices/n12/n12_defs.asm b/avr/devices/n12/n12_defs.asm
index 0446294..1fb450d 100644
--- a/avr/devices/n12/n12_defs.asm
+++ b/avr/devices/n12/n12_defs.asm
@@ -148,4 +148,22 @@
 .equ OWI_PINNUM  = PORTB2
 
 
+; ---------------------------------------------------------------------------
+; SK6812
+
+.equ SK6812_DDR    = DDRA
+.equ SK6812_PORT   = PORTA
+.equ SK6812_PINNUM = PORTA5
+
+
+
+; ---------------------------------------------------------------------------
+; debug
+
+.equ DEBUG_LED_DDR      = DDRA
+.equ DEBUG_LED_PORT_OUT = PORTA
+.equ DEBUG_LED_PORT_IN  = PINA
+.equ DEBUG_LED_PINNUM   = PORTA5
+
+
 
diff --git a/avr/devices/n12/n12_main.asm b/avr/devices/n12/n12_main.asm
index 4bb6d3d..3076d31 100644
--- a/avr/devices/n12/n12_main.asm
+++ b/avr/devices/n12/n12_main.asm
@@ -44,28 +44,32 @@
 #define MODULES_COM_WITH_ADDR_PROTO
 ;#define MODULES_LED
 #define MODULES_LED_SIMPLE
-#define MODULES_TWI_MASTER
+;#define MODULES_TWI_MASTER
 ;#define MODULES_LCD
 ;#define LCD_MINIMAL_FONT
 ;#define MODULES_SI7021
 #define MODULES_STATS
 ;#define MODULES_CNY70
 ;#define MODULES_REED
-#define MODULES_OWI_MASTER
+;#define MODULES_OWI_MASTER
 ;#define MODULES_DS18B20
+#define MODULES_SK6812
+
 
 
 ; ---------------------------------------------------------------------------
 ; defines for modules
 
-.equ VALUE_ID_SI7021_TEMP = 0x01
-.equ VALUE_ID_SI7021_HUM  = 0x02
+.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_ADC            = 0x03
+.equ VALUE_ID_REED1          = 0x04
+.equ VALUE_ID_REED2          = 0x05
 
-.equ VALUE_ID_REED_CONF   = 0x81
+.equ VALUE_ID_REED_CONF      = 0x81
+.equ VALUE_ID_LED_NUMLEDS    = 0x82
+.equ VALUE_ID_LED_RGBW_VALUE = 0x83
 
 
 
@@ -171,7 +175,9 @@ firmwareStart:   rjmp main
 #ifdef MODULES_DS18B20
   .include "modules/ds18b20/main.asm"
 #endif
-
+#ifdef MODULES_SK6812
+  .include "modules/sk6812/main.asm"
+#endif
 
 
 ; ***************************************************************************
@@ -252,6 +258,13 @@ timerList:
 
 
 systemSetSpeed:
+.if clock == 1000000
+  ldi r16, (1<<CLKPCE)
+  ldi r17, (1<<CLKPS1) | (1<<CLKPS0)
+  out CLKPR, r16
+  out CLKPR, r17
+.endif
+
 .if clock == 8000000
   ldi r16, (1<<CLKPCE)
   ldi r17, 0
@@ -262,12 +275,10 @@ systemSetSpeed:
 
 
 systemSetBootSpeed:
-.if clock == 8000000
   ldi r16, (1<<CLKPCE)
   ldi r17, (1<<CLKPS1) | (1<<CLKPS0)
   out CLKPR, r16
   out CLKPR, r17
-.endif
   ret
 
 
@@ -395,6 +406,20 @@ onSetValueReceived:
   ret
 #endif
 onSetValueReceived_l1:
+  cpi r16, VALUE_ID_LED_RGBW_VALUE
+  brne onSetValueReceived_l2
+#ifdef MODULES_SK6812
+  rjmp onSetRgbwValue
+#endif
+onSetValueReceived_l2:
+  cpi r16, VALUE_ID_LED_NUMLEDS
+  brne onSetValueReceived_l3
+#ifdef MODULES_SK6812
+  rjmp onSetNumLeds
+#endif
+onSetValueReceived_l3:
+  ldi r16, CPRO_CMD_VALUE_SET_NACK
+  rcall CPRO_SendSetValueResponse
   clc
   ret
 
@@ -415,3 +440,35 @@ onSetReedConf:
 #endif
 
 
+#ifdef MODULES_SK6812
+onSetRgbwValue:
+  ; get new value
+  adiw xh:xl, CPRO_PACKET_VALUE_OFFS_VALUE
+  ld r18, X+ ; R
+  ld r19, X+ ; G
+  ld r20, X+ ; B
+  ld r21, X+ ; W
+  sbiw xh:xl, CPRO_PACKET_VALUE_OFFS_VALUE+4
+  rcall SK6812_SetAllColor
+  ; send ACK
+  ldi r16, CPRO_CMD_VALUE_SET_ACK
+  rcall CPRO_SendSetValueResponse
+  sec
+  ret
+
+onSetNumLeds:
+  ; get new value
+  adiw xh:xl, CPRO_PACKET_VALUE_OFFS_VALUE
+  ld r16, X ; number of leds
+  sbiw xh:xl, CPRO_PACKET_VALUE_OFFS_VALUE
+  sts sk6812NumLeds, r16
+  ; send ACK
+  ldi r16, CPRO_CMD_VALUE_SET_ACK
+  rcall CPRO_SendSetValueResponse
+  sec
+  ret
+
+#endif
+
+
+