#include <LiquidCrystal_I2C.h>
#include <Servo.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

#define button 2
#define pintu 3

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
Servo myservo;


enum Status {
  Tertutup,
  Wait1,
  Buka,
  Terbuka,
  Wait2
};

Status kondisi = Tertutup;

void setup() {
  lcd.init();
  lcd.backlight();
  myservo.attach(5);
  pinMode(button, INPUT_PULLUP);
  pinMode(pintu, INPUT_PULLUP);

}
void loop() {
  switch (kondisi) {
    case Tertutup:
      lcd.setCursor(0, 0);
      lcd.print("");

      if (digitalRead(button) == LOW) {
        kondisi = Wait1;
      }
      break;

    case Wait1:
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Kunci Terbuka");
      myservo.write(180);
      kondisi = Buka;

      break;

    case Buka:
      if (digitalRead(pintu) == LOW) {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Pintu Terbuka");
        kondisi = Terbuka;
      }
      break;

    case Terbuka:
      if (digitalRead(pintu) == HIGH) {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("///");
        kondisi = Wait2;

      }
      break;

    case Wait2:
    lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Pintu Tertutup");
      myservo.write(90);
      delay(1000);
      lcd.clear();
      kondisi = Tertutup;
      break;

  }
}