#include <ESP32Servo.h>
#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

Servo myservo;  

const int BARIS = 4;
const int KOLOM = 4;
  char keys[BARIS] [KOLOM] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

byte rowPins[BARIS] = {14,12,19,18};//connect to the row pinouts of the keypad
byte colPins[KOLOM] = {5,4,2,15};
Keypad keypad = Keypad (makeKeymap(keys), rowPins, colPins, BARIS, KOLOM);

char customKey;         //Variabel penampung input keypad
int number = 0;         //Variabel penampung nilai angka
int password = 1270;    //Password 
#define buzzer 25

void setup() {
  // put your setup code here, to run once;
  Serial.begin(9600);
  myservo.attach(15); 
  lcd.init();
  lcd.backlight();
  pinMode(26, OUTPUT);
}

void loop() {
  lcd.setCursor(0,0);
  lcd.print("input password");

  customKey = keypad.getKey();



  switch(customKey){
    case'0' ... '9':
    lcd.setCursor(0,1);
    number = number * 10 + (customKey - '0');
    lcd.print(number);
    Serial.print(customKey);
    Serial.print(",");
    Serial.println(number);
  break;


case'#':
//jika password benar, maka
if(number == password){
  digitalWrite(26, HIGH); // LED menyala
  lcd.setCursor(0,1);
  lcd.print("Password Benar");  //Tampilan LCD
  myservo.write(0);    
//Reset variabel number
  number = 0;
  delay(5000);
  lcd.clear(); //Menghapus tampilan LCD
}

//jika password salah, maka
else{
  lcd.setCursor(0,1);
  lcd.print("Password Salah");  //Tampilan LCD
  digitalWrite(26, LOW); // LED mati
  tone(buzzer, 250, 500); //PIN, FREKUENSI, WAKTU (durasi suara)
  myservo.write(90);    
//Reset variabel number
  number = 0;
  delay(5000);
  lcd.clear();  //Menghapus tampilan LCD
}
break;

//............Jika input '*' maka hapus tampilan............//
case '*':
 number = 0; //Reset variabel number
 lcd.clear(); //Menghapus tampilan LCD
break;
 }
}