#include <Stepper.h>
#include <LiquidCrystal.h>

const int LED1_PIN=2;
const int MOTION_SENSOR_PIN=3;
const int SWITCH_PIN=4;
const int LED2_PIN=5;
int motionStateCurrent=LOW;
int motionStatePrevious=LOW;
const int STEP_PIN=7;
const int DIRECTION_PIN=6;
const int stepsPerRevolution=200;

LiquidCrystal lcd(8,9,10,11,12,13);

void setup() {
  // put your setup code here, to run once:
 Serial.begin(9600);
 pinMode(LED1_PIN, OUTPUT);
 pinMode(LED2_PIN, OUTPUT);
 pinMode(MOTION_SENSOR_PIN, INPUT);
 pinMode(SWITCH_PIN, INPUT_PULLUP);
 pinMode(STEP_PIN, OUTPUT);
 pinMode(DIRECTION_PIN, OUTPUT);
 lcd.begin(16,2);

}

void loop() {
  // put your main code here, to run repeatedly:
motionStatePrevious=motionStateCurrent;
motionStateCurrent=digitalRead(MOTION_SENSOR_PIN);
if(digitalRead(SWITCH_PIN)==LOW)
 { 
  digitalWrite(LED2_PIN, HIGH);
  lcd.setCursor(2,0);
  lcd.print("DOOR  CLOSED");

  if(motionStatePrevious==LOW && motionStateCurrent == HIGH)
   { 
    Serial.println("On");
    digitalWrite(LED1_PIN, HIGH);
    digitalWrite(DIRECTION_PIN, HIGH);

    for(int x=0; x<800; x++)
     { 
       digitalWrite(STEP_PIN, HIGH);
       delayMicroseconds(700); //Rotation Speed
       digitalWrite(STEP_PIN, LOW);
       delayMicroseconds(700);

     }
    
    lcd.clear(); //katharismos othonis
    delay(1000);
    lcd.setCursor(3,0);
    lcd.print("DOOR  OPEN");
    lcd.setCursor(4,1);
    lcd.print("Welcome!");
    delay(4000);
    
    digitalWrite(DIRECTION_PIN, LOW);

    for(int x=0; x<800; x++)
     {
       digitalWrite(STEP_PIN, HIGH);
       delayMicroseconds(700); //Rotation Speed
       digitalWrite(STEP_PIN, LOW);
       delayMicroseconds(700);

     }
    
    lcd.clear();
    lcd.setCursor(2,0);
    delay(800);
    lcd.print("DOOR  CLOSED");
    
   }
  else
   if(motionStatePrevious==HIGH && motionStateCurrent==LOW)
   {
    Serial.println("Off");
    digitalWrite(LED1_PIN, LOW);
    lcd.setCursor(2,0);
    lcd.print("DOOR  CLOSED");
    delay(1500);
  }
 }
 else{
  digitalWrite(LED2_PIN, LOW);
  lcd.clear(); //katharismos othonis
 }
 delay(700);
}