E06. Addressable RGB LEDs: NeoPixel / WS2812 Strips

#include <Adafruit_NeoPixel.h>         // the NeoPixel library

const int dataPin = 5;                 // the strip's DIN wire is on GPIO 5
const int ledCount = 8;                // how many LEDs are on the strip

// describe the strip: how many LEDs, which pin, and the usual NeoPixel settings
Adafruit_NeoPixel strip(ledCount, dataPin, NEO_GRB + NEO_KHZ800);

void setup() {                         // runs once
  strip.begin();                       // get the strip ready
  strip.fill(strip.Color(80, 0, 0));   // every LED dim red (red 80, green 0, blue 0)
  strip.show();                        // send the colours to the strip
}

void loop() {                          // nothing to repeat in this sketch
}

#include <Adafruit_NeoPixel.h>                     // the NeoPixel library

const int dataPin = 5;                             // the strip's DIN wire is on GPIO 5
const int ledCount = 8;                            // how many LEDs are on the strip

// describe the strip: how many LEDs, which pin, and the usual NeoPixel settings
Adafruit_NeoPixel strip(ledCount, dataPin, NEO_GRB + NEO_KHZ800);

void setup() {                                     // runs once
  strip.begin();                                   // get the strip ready
}

void loop() {                                      // runs over and over
  for (int i = 0; i < ledCount; i++) {             // i counts 0, 1, 2 ... 7
    strip.clear();                                 // all LEDs off (in memory)
    strip.setPixelColor(i, strip.Color(0, 80, 0)); // LED number i green (in memory)
    strip.show();                                  // send the colours to the strip
    delay(100);                                    // wait so you can see the dot
  }
}