sk6812: send END_OF_UPDATE in the last packet

sk6812.c

@@ -22,6 +22,7 @@
 #define FADE_COLOR   1
 #define ADD_COLOR    2
 #define SET_FADESTEP 3
+#define END_OF_UPDATE 254
 
 // creates the socket needed for steering the LED strip
 int sk6812_init(struct sk6812_ctx *ctx, const char *host, unsigned short port) {
@@ -102,6 +103,10 @@ void sk6812_set_fadestep(struct sk6812_ctx *ctx, uint8_t fadestep) {
 }
 
 int sk6812_commit(struct sk6812_ctx *ctx) {
+  // send end-of-update packet in the end
+  ctx->packetQueue[ctx->queueIndex].action  = END_OF_UPDATE;
+  ctx->queueIndex++;
+
   if(send(ctx->socket, ctx->packetQueue, ctx->queueIndex * sizeof(struct SK6812Packet), 0) == -1) {
     return 1;
   }