esp-pixelprojektor/pixelprojektor/pixelprojektor.ino

#include <Homie.h> 
// homie lib from: https://github.com/marvinroger/homie-esp8266/
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

#define PIN 2  //data pin for ws2812

Adafruit_NeoPixel strip = Adafruit_NeoPixel(64, PIN, NEO_GRB + NEO_KHZ800);

HomieNode homieNode("pixel", "commands");

void led_fill(uint32_t c)
{
  for (int i=0; i < strip.numPixels(); i++) {
    strip.setPixelColor(i, c);    //turn every third pixel on
  }
  strip.show();
}

bool effectHandler(const HomieRange& range, const String& value) {
  int sep = value.indexOf("|");
  
  
    
  Homie.getLogger() << "-> " << value << endl;

  //Serial.print("->"); Serial.println(value);

  if (value.charAt(0)=='#'){ //solid fill
    String color=value.substring(1);
    int number = (int) strtol( &color[0], NULL, 16);
    

    // Split them up into r, g, b values
    int r = number >> 16;
    int g = number >> 8 & 0xFF;
    int b = number & 0xFF;
    Homie.getLogger() << "r=" << r << " g=" << g << " b=" << b << endl;
    //Serial.print("r=");Serial.print(r);
    //Serial.print(" g=");Serial.print(g);
    //Serial.print(" b=");Serial.println(b);

    led_fill(strip.Color(r, g, b));
  }
   
  
  return true;
}

bool pixelsHandler(const HomieRange& range, const String& value) {
  int sep = value.indexOf("|");
  
  
  if(sep > 0) {
    
    //Homie.getLogger() << "scroll " << value << " wait " << wait << endl;
     
  } else {
    
    //Homie.getLogger() << "scroll " << value << endl;
  }
  
  return true;
}

void setup() {
  Serial.begin(115200);
  Serial << endl << endl;
  

  Homie_setFirmware("pixelprojektor", "1.0.0");
  
  homieNode.advertise("effect").settable(effectHandler);
  homieNode.advertise("pixels").settable(pixelsHandler);

  strip.begin();
  strip.show(); // Initialize all pixels to 'off'

  led_fill(strip.Color(0, 0, 0));
  
  Homie.setup();

  
}

void loop() {
  Homie.loop();
  long currentMillis = millis();
  
}