diff --git a/src/extras/Pixel.cpp b/src/extras/Pixel.cpp
index d64bde0..6699b4d 100644
--- a/src/extras/Pixel.cpp
+++ b/src/extras/Pixel.cpp
@@ -8,11 +8,13 @@ Pixel::Pixel(int pin){
   rf=new RFControl(pin,false,false);          // set clock to 1/80 usec, no default driver
   setTiming(0.32, 0.88, 0.64, 0.56, 80.0);    // set default timing parameters (suitable for most SK68 and WS28 RGB pixels)
 
-  rmt_isr_register(loadData,(void *)this,0,NULL);       // set custom interrupt handler
+  rmt_isr_register(loadData,NULL,0,NULL);                // set custom interrupt handler
   rmt_set_tx_thr_intr_en(rf->getChannel(),true,8);      // enable threshold interrupt (note end-transmission interrupt automatically enabled by rmt_tx_start)
 
   txEndMask=TxEndMask(rf->getChannel());      // create bit mask for end-of-transmission interrupt specific to this channel
 
+  Serial.printf("%d %d %08X\n",rf->getChannel(),txEndMask,RMT.int_ena.val);
+
 }
 
 ///////////////////
@@ -55,11 +57,15 @@ void Pixel::setColors(const uint32_t *data, uint32_t nPixels, boolean multiColor
   status.iMem=0;
   status.iBit=24;
   status.started=true;
-  this->multiColor=multiColor;
+  status.px=this;
+  status.multiColor=multiColor;
 
   loadData(this);         // load first two bytes of data to get started
   loadData(this);
 
+  for(int i=0;i<status.px->memSize;i++)
+    Serial.printf("%d %08X\n",i,RMTMEM.chan[rf->getChannel()].data32[i].val);
+
   rmt_tx_start(rf->getChannel(),true);
 
   while(status.started);            // wait for transmission to be complete
@@ -84,9 +90,7 @@ uint32_t Pixel::getColorHSV(float h, float s, float v){
 
 void Pixel::loadData(void *arg){
 
-  Pixel *pix=(Pixel *)arg;
-
-  if(RMT.int_st.val & pix->txEndMask){
+  if((RMT.int_st.val & status.px->txEndMask) >0){
     RMT.int_clr.val=~0;
     status.started=false;
     return;
@@ -95,20 +99,20 @@ void Pixel::loadData(void *arg){
   RMT.int_clr.val=~0;
 
   if(status.nPixels==0){
-    RMTMEM.chan[pix->rf->getChannel()].data32[status.iMem].val=0;
+    RMTMEM.chan[status.px->rf->getChannel()].data32[status.iMem].val=0;
     return;
   }
   
   for(int i=0;i<8;i++)
-    RMTMEM.chan[pix->rf->getChannel()].data32[status.iMem++].val=pix->pattern[(*status.data>>(--status.iBit))&1];
+    RMTMEM.chan[status.px->rf->getChannel()].data32[status.iMem++].val=status.px->pattern[(*status.data>>(--status.iBit))&1];
     
   if(status.iBit==0){
     status.iBit=24;
-    status.data+=pix->multiColor;
+    status.data+=status.multiColor;
     status.nPixels--;    
   }
   
-  status.iMem%=pix->memSize;    
+  status.iMem%=status.px->memSize;    
 }
 
 ///////////////////
diff --git a/src/extras/Pixel.h b/src/extras/Pixel.h
index 8dbb222..cdb6d21 100644
--- a/src/extras/Pixel.h
+++ b/src/extras/Pixel.h
@@ -16,6 +16,8 @@ class Pixel {
     int iBit;
     int iMem;
     boolean started;
+    Pixel *px;
+    boolean multiColor;
   };
   
   private:
@@ -23,7 +25,6 @@ class Pixel {
     uint32_t pattern[2];           // storage for zero-bit and one-bit pulses
     uint32_t resetTime;            // minimum time (in usec) between pulse trains
     uint32_t txEndMask;            // mask for end-of-transmission interrupt
-    boolean multiColor;            // flag to indicate array contains multiple colors (don't just repeat first color for nPixels)
  
     #if defined(CONFIG_IDF_TARGET_ESP32)
       const int memSize=64;
diff --git a/src/extras/extras.ino b/src/extras/extras.ino
index d447e49..f5b0f56 100644
--- a/src/extras/extras.ino
+++ b/src/extras/extras.ino
@@ -95,22 +95,23 @@ void setup() {
 
   Serial.println("\n\nHomeSpan Pixel Example\n");
 
-//  Pixel px0(10);
+  Pixel px0(10);
   Pixel px(1);
+  Pixel px1(0);
 
   uint32_t colors[20];
 
-  colors[0]=px.getColorRGB(0,40,0);
+  colors[0]=px.getColorRGB(40,0,0);
   colors[1]=px.getColorRGB(40,0,0);
   colors[2]=px.getColorRGB(40,0,0);
   colors[3]=px.getColorRGB(40,40,0);
   colors[4]=px.getColorRGB(40,40,0);
   colors[5]=px.getColorRGB(40,40,0);
   colors[6]=px.getColorRGB(0,40,0);
-  colors[7]=px.getColorRGB(0,40,0);
+  colors[7]=px.getColorRGB(40,0,0);
   
   px.setColors(colors,8);
-//  px.setHSV(240,80,40,3);
+  px.setHSV(0,100,40,3);
   Serial.println("\n\nDone\n\n");
   while(1);