diff --git a/avr/modules/sk6812/main.asm b/avr/modules/sk6812/main.asm
index ac0d3ea..250cfbc 100644
--- a/avr/modules/sk6812/main.asm
+++ b/avr/modules/sk6812/main.asm
@@ -71,17 +71,50 @@ SK6812_Init_error:
 
 
 ; ---------------------------------------------------------------------------
-; SK6812_Fini
+; @routine SK6812_Fini
 ;
-; IN:
-; - nothing
-; OUT:
-; - CFLAG: set if okay, clear on error
+; @return CFLAG set if okay, clear on error
 ; USED:
 
 SK6812_Fini:
   sec
   ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine SK6812_OnPacketReceived @global
+;
+; @clobbers any, -X
+
+SK6812_OnPacketReceived:
+  adiw xh:xl, 2                                ; command
+  ld r16, X
+  sbiw xh:xl, 2
+  cpi r16, CPRO_CMD_VALUE_SET
+  breq SK6812_OnPacketReceived_set
+  clc                                          ; unexpected msg
+  ret
+SK6812_OnPacketReceived_set:
+  rcall CPRO_ReadValue                         ; (none)
+  cpi r17, VALUE_ID_LED_RGBW_VALUE
+  breq SK6812_OnPacketReceived_setRGBW
+  cpi r17, VALUE_ID_LED_NUMLEDS
+  breq SK6812_OnPacketReceived_setNumLeds
+  clc
+  ret
+SK6812_OnPacketReceived_setRGBW:
+  rcall SK6812_SetAllColor                     ; value is in R18-R21
+  rjmp SK6812_OnPacketReceived_sendAck
+SK6812_OnPacketReceived_setNumLeds:
+  sts sk6812NumLeds, r18
+SK6812_OnPacketReceived_sendAck:
+  ldi r16, CPRO_CMD_VALUE_SET_ACK
+  rcall CPRO_SendSetValueResponse
+  sec
+  ret
+; @end