webusb + neopixels

webusb_pixel.ino

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif


#define PIN 6

// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
//   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(256, PIN, NEO_GRB + NEO_KHZ800);



#include <WebUSB.h>



WebUSB WebUSBSerial(1, "webusb.github.io/arduino/demos");

#define Serial WebUSBSerial

const int redPin = 9;
const int greenPin = 10;
const int bluePin = 11;
int color[3];
int index;

void setup() {
  while (!Serial) {
    ;
  }
  
  Serial.begin(9600);
  Serial.write("Sketch begins.\r\n");
  Serial.flush();
  index = 0;
  strip.begin();
}

void loop() {
  if (Serial && Serial.available()) {
    color[index++] = Serial.read();
    if (index == 3) {


         for(uint16_t i=0; i<strip.numPixels(); i++) {
          strip.setPixelColor(i, strip.Color( color[0], color[1], color[2] ));
        }
        strip.show();
//      
//      analogWrite(redPin, color[0]);
//      analogWrite(greenPin, color[1]);
//      analogWrite(bluePin, color[2]);
      
      Serial.print("Set LED to ");
      Serial.print(color[0]);
      Serial.print(", ");
      Serial.print(color[1]);
      Serial.print(", ");
      Serial.print(color[2]);
      Serial.print(".\r\n");
      Serial.flush();
      index = 0;
    }
  }
}