Code for the arduino waterreminder project

Waterreminder.ino

#include <Sleep_n0m1.h>
// https://github.com/n0m1/Sleep_n0m1

// Project: Waterminder
// Description: Reminder for drinking water :)
// Date: 2016-05-27
// Author: Milchreis

// Set up the pin for connecting the buzzer
const int SOUND_PIN = 4;
// Set up the pin for blinking the led
const int LED_PIN = 7;
// Set up the time intervall for waiting in minutes
unsigned long sleepTimeInMins = 30;

Sleep sleep;

void setup()  {
  pinMode(SOUND_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
}

void loop()  {
  // configure here your melodie
  beep(150, 65);
  beep(150, 49);
  beep(150, 65);

  sleep.pwrDownMode();
  sleep.sleepDelay((unsigned long)sleepTimeInMins * 60 * 1000);
}

void beep(int delayms, int sound) {
  digitalWrite(LED_PIN, HIGH);
  tone(SOUND_PIN, sound, delayms);
  // split the delay time to blink the led for one tone
  delay(delayms/2);
  digitalWrite(LED_PIN, LOW);
  delay(delayms/2);
}