Software

// Include the Arduino Stepper Library
#include <Stepper.h>

// Number of steps per output rotation
const int stepsPerRevolution = 200;
const int interruptPin = 21;
bool closed = true;
bool pressed = false;

// Create Instance of Stepper library
Stepper myStepper(stepsPerRevolution, 2, 3, 5, 4);


void setup()
{
  // set the speed at 60 rpm:
  myStepper.setSpeed(60);
  // initialize the serial port:
  Serial.begin(9600);
  attachInterrupt(digitalPinToInterrupt(interruptPin), spinMotor, RISING);
}

void loop() 
{
  if (closed && pressed){
     myStepper.step(stepsPerRevolution * 3);
     delay(500);
     pressed = false;
  } 
  if (!(closed) && pressed){
    myStepper.step(-stepsPerRevolution * 3);
    delay(500);
    pressed = false;
  }
}

void spinMotor(){
  pressed = true;
  if (closed){
    closed = false;
  } else {
    closed = true;
  }
}