Arduino-controlled RGB LED grow light

grow-light.ino

#include <Adafruit_NeoPixel.h>

#define LEDS 512
#define PIN 5
#define BUTTON 2

#define MODEWHITE 0
#define MODEVEG 1
#define MODEFLOWER 2
#define MODEBOTH 3
#define MODESUPERWHITE 4

#define ON 255
#define DIM 128
#define OFF 0

// 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)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(LEDS, PIN, NEO_GRB + 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.

int buttonState = 0;
int lastButtonState = 0;
int lightMode = 0;
long lastDebounceTime = 0;
long debounceDelay = 250;

void setup() {
  Serial.begin(9600);
  pinMode(BUTTON, INPUT);
  attachInterrupt(digitalPinToInterrupt(BUTTON), buttonInterrupt, CHANGE);
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  setLights(MODEWHITE);
  Serial.print("Good to grow!");
}

void loop() {

}

void buttonInterrupt() {
  int reading = digitalRead(BUTTON);
  if (reading == HIGH) {
    if((millis() - lastDebounceTime) < debounceDelay) {
      Serial.print("BOUNCE!");
      return;
    }
    lastDebounceTime = millis();
    lightMode = lightMode >= MODESUPERWHITE ? 0 : lightMode + 1;
    setLights(lightMode);
  }
  return;
}

void setLights(int mode) {
  switch(mode) {
    case MODEWHITE:
      colorWipe(DIM, DIM, DIM);
      break;

    case MODEVEG:
      colorWipe(OFF, OFF, ON);
      break;

    case MODEFLOWER:
      colorWipe(ON, OFF, OFF);
      break;

    case MODEBOTH:
      colorWipe(ON, OFF, ON);
      break;

    case MODESUPERWHITE:
      colorWipe(ON, ON, ON);
      break;
      
    default:
      Serial.print("Invalid mode specified.");
      Serial.print(mode);
      break;
  }
}

// Fill the dots one after the other with a color
void colorWipe(int r, int g, int b) {
  uint32_t c = strip.Color(r, g, b);
  for (uint16_t i = 0; i < strip.numPixels(); i++) {
    strip.setPixelColor(i, c);
  }
  strip.show();
}