#include <Adafruit_NeoPixel.h>


#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(1, PIN, NEO_RGBW + NEO_KHZ800);

// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel.  Avoid connecting
// on a live circuit...if you must, connect GND first.

unsigned long interval=10; // the time we need to wait

unsigned long previousMillis=0; // millis() returns an unsigned long.

int counter = 0;
boolean sw = true;

void setup() {
  Serial.begin(9600);
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {
  unsigned long currentMillis = millis(); // grab current time
  // check if "interval" time has passed (1000 milliseconds)
  if ((unsigned long)(currentMillis - previousMillis) >= interval) {
    
if(sw)
    {
      counter++;
      if(counter==255) sw = !sw;
    }
    if(!sw)
    {
      counter--;
      if(counter==0) sw = !sw;
    }
    // fade led mit counter
     
    Serial.println(counter);
    strip.setPixelColor(0, 0, counter, 0, 0);
    strip.show();

    previousMillis = millis();
   }
  }

Tags: #Arduino #Code #NeoPixel