FADing (Fall Asleep Device)

FADing.ino

/*
  FADing : version 1.0
  Made by : Youz

 1- Push ON button to power up until you see 1 flash.
 2- To add more minutes to the process, you have 5 seconds to add 2 more minutes for each push on the "mode" button.
 3- To switch betwin top light or inside light, quick push the "mode" button.
 4- To shutdown, long push the "mode" button.
  
*/

// for change time of default process
int initTime = 8; // initial time of process in minutes. YOU CAN MODIFY IT

// Pin
int led = 9; // the PWM pin the LED is attached to (light for celing)
int mode = A5; // the input pin for the mode button
int pwr = 4; // the power pin to set relay ON through the MOSFET

// Var
int button_delay = 0; // used to check long or short push on mode button
int brightness = 10; // how initial bright the LED is
int fadeAmount = 1; // how many points to fade the LED by
int start = 1; // used for startup
float delayM = 20; // delay between brigtness change for the first 10 seconds
unsigned long temps; // for compare with millis()
int cyclecompt = 1; // for both 'while'
int buttonCounter = 0; // used for the number of push of the mode button
int lastButtonState = 0; // the last state of mode button
int buttonState = 0; // the current state of mode button
float intervaL = 0; // the interval for slow down fade in/fade out
int md2 = 0; // use for minutes added by push mode button and for fulltime run of the EasySleep

void setup() {
  temps = millis();
  pinMode(led, OUTPUT); pinMode(pwr, OUTPUT); pinMode(mode, INPUT); pinMode(10, OUTPUT);
  digitalWrite(pwr, HIGH);
}

void loop() {
  if (start == 1) {   // Run startup loop
    StarT();
  }
  if ( millis() >= temps + 10000 ) { // every 10 seconds, fade in/fade out slow down
    delayM = delayM + intervaL;
    temps = temps + 10000;
  }
  if ( temps >  md2 * 60000 ) { // check if the selected number of minutes is reach
    EnD();
  }
  cycle(); // run 1 fade in and 1 fade out step
}

void StarT() {

  analogWrite(10, 30); delay(200); analogWrite(10, 0); delay(300); analogWrite(10, 30); delay(200); analogWrite(10, 0); delay(1000);  // blink 2 times when arduino boot finish

  while (cyclecompt < 500) { // check for 5 seconds the number of time mode button is pushed
    buttonState = digitalRead(mode);
    if (buttonState != lastButtonState) {
      if (buttonState == HIGH) {
        buttonCounter++;
        delay(200);
      }
    }
    lastButtonState = buttonState;
    delay(10);
    cyclecompt++;
  }

  if (buttonCounter == 0) {
    md2 = initTime;
  }
  else {
    md2 = initTime + ( buttonCounter * 2 ); // Add 2 minutes per push of the mode button
  }
  intervaL = 21.0 / ( (float)md2 * 6.0 ); //21 is the interval between brightness change from starting 11 breath per minute (20 ms) to ending 6 breath per minute (41 ms)
  start = 0;
  if ( md2 != initTime ) { // blink the number of time mode button is pushed
    cyclecompt = 1;
    while (cyclecompt < buttonCounter + 1) {
      analogWrite(10, 50); delay(200); analogWrite(10, 0); delay(300);
      cyclecompt++;
    }
    delay(800);
  }
}

void cycle() { // 1 cycle of fade in/fade out
  cyclecompt = 0;
  while (cyclecompt < 220) {
    analogWrite(led, brightness);
    brightness = brightness + fadeAmount;
    if ( brightness <= 10 ) { // On ending invert fadeAmount for next fade in
      fadeAmount = -fadeAmount;
      delay(1000);
    }
    if ( brightness >= 115 ) { // If led is full bright, invert fadeAmount to fade out
      fadeAmount = -fadeAmount;
    }
    delay(delayM);
    cyclecompt++;

    if (digitalRead(mode) == HIGH) {
      button_delay = 0;

      while (digitalRead(mode) == HIGH) {
        button_delay++;
        delay(100);

        if (button_delay > 10) { //no need to wait for user to release
          digitalWrite(9, LOW);
          digitalWrite(10, LOW);
          EnD();
          break;
        }
      }
      if (button_delay < 10) { //short press
        if (led == 9) {
          for (int fadeValue = brightness ; fadeValue >= 0; fadeValue -= 5) {
            analogWrite(9, fadeValue);
            delay(30);
          }
          digitalWrite(9, LOW);
          led = 10; button_delay = 0;
        }
        else {
        for (int fadeValue = brightness ; fadeValue >= 0; fadeValue -= 5) {
            analogWrite(10, fadeValue);
            delay(30);
          }
           digitalWrite(10, LOW);
          led = 9; button_delay = 0;
        }
      }
    }
  }
}
void EnD() {
  digitalWrite(pwr, LOW); delay(3000);
}