#include <Stepper.h>
#include <LiquidCrystal_I2C.h>

#define LCD_ADDR 0X27
#define LCD_COLUMNS 16
#define LCD_ROWS 2

const int MOTION_SENSOR_PIN=7;
const int LED1_PIN=3;
//const int LED2_PIN=9;
//const int LED3_PIN=10;
const int BUZZER_PIN=11;
const int STEP_PIN=9;
const int DIRECTION_PIN=10;
const int stepsPerRevolution=200;
int motionStateCurrent=LOW;
int motionStatePrevious=LOW;
const int pushB=12;
const int LED4_PIN=6;

LiquidCrystal_I2C lcd(LCD_ADDR, LCD_COLUMNS, LCD_ROWS);

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(MOTION_SENSOR_PIN, INPUT);

pinMode(LED1_PIN, OUTPUT);
pinMode(LED4_PIN, OUTPUT);
//pinMode(LED3_PIN, OUTPUT);
pinMode(STEP_PIN, OUTPUT);
pinMode(DIRECTION_PIN, OUTPUT);
pinMode(BUZZER_PIN, OUTPUT);
pinMode(pushB, INPUT_PULLUP);

}

void loop() {
  // put your main code here, to run repeatedly:
motionStatePrevious=motionStateCurrent;
motionStateCurrent=digitalRead(MOTION_SENSOR_PIN);
digitalWrite(DIRECTION_PIN, HIGH);
if(digitalRead(pushB)==LOW)
{
  digitalWrite(LED4_PIN, HIGH);
  lcd.begin(16,2);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(2,0);
  lcd.print("DOOR  CLOSED");


  if(motionStatePrevious==LOW && motionStateCurrent == HIGH)
  { 
    Serial.println("On");
    digitalWrite(LED1_PIN, HIGH);
    digitalWrite(DIRECTION_PIN, HIGH);
    //digitalWrite(BUZZER_PIN, HIGH);
  
    for(int x=0; x<800; x++)
     { 
       digitalWrite(STEP_PIN, HIGH);
       digitalWrite(BUZZER_PIN, HIGH);
       delayMicroseconds(700); //Rotation Speed
       digitalWrite(STEP_PIN, LOW);
       delayMicroseconds(700);

     }
  
    lcd.clear(); //katharismos othonis
    //lcd.setCursor(2,0);
    //lcd.print("            "); //katharismos othonis apo proigoumena texts.
    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(3,0);
    //lcd.print("          ");
    //lcd.setCursor(4,1);
    //lcd.print("        ");
    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(LED4_PIN, LOW);
  lcd.clear(); //katharismos othonis
  lcd.noBacklight();
  //lcd.setCursor(2,0);
  //lcd.print("            "); //katharismos othonis apo proigoumena texts.
  }
  delay(2000);
}