NOTslider

// Include the Arduino Stepper Library
#include <Stepper.h>
const int trigPin = 3;
const int echoPin = 2;
const int detect_range = 100; // 1 m
const int door_timer = 10000;

bool is_opened;
int run_timer = 0;

long duration;
int distanceCm, distanceInch;

// Number of steps per output rotation
const int stepsPerRevolution = 200;

// Create Instance of Stepper library
Stepper myStepper(stepsPerRevolution, 4, 5, 6, 7);


void setup() {
	pinMode(trigPin, OUTPUT);
	pinMode(echoPin, INPUT);
	is_opened = false;
	myStepper.setSpeed(60);
}
void loop() {
	digitalWrite(trigPin, LOW);
	delayMicroseconds(2);
	digitalWrite(trigPin, HIGH);
	delayMicroseconds(10);
	digitalWrite(trigPin, LOW);
	duration = pulseIn(echoPin, HIGH);
	distanceCm= duration*0.034/2;

	if (distanceCm < detect_range)
	{
		open_door();
	}
	if ((run_timer > door_timer) && is_opened){
		close_door();
	}

	run_timer++;

}


void open_door(){
	is_opened = true;
	run_timer = 0;
	myStepper.step(stepsPerRevolution*5);
	delay(500);
}

void close_door(){
	is_opened = false;
	myStepper.step(-stepsPerRevolution*5);
	delay(500);

}