diff --git a/avr/modules/sk6812/main.asm b/avr/modules/sk6812/main.asm
index 6797649..4d29c9b 100644
--- a/avr/modules/sk6812/main.asm
+++ b/avr/modules/sk6812/main.asm
@@ -32,6 +32,7 @@
 .dseg
 
 sk6812DataBegin:
+  sk6812State:       .byte 1                    ; 0=off, other values: on
   sk6812NumLeds:     .byte 1
   sk6812Pattern:     .byte 5*SK6812_PATTERN_NUM ; 1 byte num leds, 4 bytes colour (RGBW)
   sk6812RGBW:        .byte 4                    ; current RGBW value
@@ -282,6 +283,7 @@ sk6812SetState:
   lds r21, sk6812RGBW+3
   rcall sk6812SetAllColor               ; (r16, r17, r23, r24, r25)
   ldi r18, 1
+  sts sk6812State, r18
   rjmp sk6812ReportState
 sk6812SetState_off:
   clr r18
@@ -290,6 +292,7 @@ sk6812SetState_off:
   clr r21
   rcall sk6812SetAllColor               ; (r16, r17, r23, r24, r25)
   ldi r18, 0
+  sts sk6812State, r18
   rjmp sk6812ReportState                ; (R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, X)
 ; @end
 
@@ -308,7 +311,7 @@ sk6812SetState_off:
 sk6812SendPattern:
 sk6812SendPattern_loop1:
     ld r23, X+ ; num leds
-    tst r23
+    tst  r23
     brne sk6812SendPattern_readandset
     ret                        ; no leds, done
 sk6812SendPattern_readandset: