pomodoro.ino

#include <Adafruit_NeoPixel.h>

#define NUM_PIXELS 12 // amount of LED

unsigned long interval = 60000;  // the time we need to wait
unsigned long previousMillis = 0;
unsigned long pause = 500; 

uint32_t currentColor;// current Color in case we need it
uint32_t red;
uint16_t currentPixel = 0;// what pixel are we operating on

Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_PIXELS, 2, NEO_GRB + NEO_KHZ800);

int ledButton = 7;

int startButton = 5;
int buttonState = LOW;
int reading;
int previous = HIGH;

long time = 0;
long debounce = 500;

void setup() {
  pinMode(startButton, INPUT_PULLUP);
  pinMode(ledButton, OUTPUT);
  currentColor = strip.Color(0,255,0);
  currentPixel = 0;
  strip.begin();
  strip.setBrightness(15);
  strip.show(); // Initialize all pixels to 'off'
}

void loop(){

  reading = digitalRead(startButton);

  if (reading == HIGH && previous == LOW && (millis() - time) > debounce) {
    if (buttonState == HIGH) {
      buttonState = LOW;
    } else if (buttonState == LOW) {
      buttonState = HIGH;
    }
    time = millis();
  }
  previous = reading;

  if (buttonState == HIGH) {
    digitalWrite(ledButton, HIGH);
    pomodoro();
    timesUp();
    buttonState = LOW;
  } 
  else if (buttonState == LOW) {
    digitalWrite(ledButton, LOW);
  }
}

void pomodoro(){

  unsigned long currentMillis = millis(); // grab current time

  for (uint16_t led = 0; led < strip.numPixels(); led++) {
    strip.setPixelColor(currentPixel,currentColor);
    strip.show();
    while (millis() < currentMillis + interval) {
      // wait
    }
    currentPixel++;
    currentMillis = millis();
  }
  currentPixel = 0;
}

void timesUp() {

  for (int t = 0; t<4; t++) {
    for(uint16_t i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i,0,0,0);
      strip.show();
    }
    wait();
    for(uint16_t i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i,currentColor);
      strip.show();
    }
    wait();
  }

  for(uint16_t i=0; i<strip.numPixels(); i++) {
    strip.setPixelColor(i,0,0,0);
    strip.show();
  }

}

void wait() {
  unsigned long currentMillis = millis(); // grab current time

  while (millis() < currentMillis + pause) {
    // wait
  }
  currentMillis = millis();
}