#include <LiquidCrystal.h>
#include <Wire.h>
#include <Keypad.h>

LiquidCrystal lcd(18, 5, 19, 21, 22, 23); 

const byte ROWS = 4; // Empat baris
const byte COLS = 4; // Empat kolom
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {32, 33, 25, 26}; 
byte colPins[COLS] = {27, 14, 12, 13}; 

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

const String correctPassword = "C3423092"; // Password yang benar
String enteredPassword = ""; // String untuk menyimpan password yang dimasukkan

// Pin untuk LED
const int redLedPin = 17;
const int greenLedPin = 16;

void setup() {
  // Inisialisasi LCD
  lcd.begin(16, 2); // Inisialisasi LCD dengan ukuran 16x2
  lcd.setCursor(0, 0);
  lcd.print("Enter Password:");

  // Inisialisasi pin LED
  pinMode(redLedPin, OUTPUT);
  pinMode(greenLedPin, OUTPUT);

  // Awal LED Merah menyala, Hijau mati
  digitalWrite(redLedPin, HIGH);
  digitalWrite(greenLedPin, LOW);
}

void loop() {
  char key = keypad.getKey();

  if (key) {
    if (key == '#') { // Tombol '#' untuk konfirmasi password
      if (enteredPassword == correctPassword) {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Access Success");
        digitalWrite(redLedPin, LOW);
        digitalWrite(greenLedPin, HIGH);
        delay(3000); // Tunda selama 3 detik
        digitalWrite(greenLedPin, LOW);
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Enter Password:");
      } else {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Pass Salah");
        digitalWrite(redLedPin, HIGH);
        delay(2000); // Tunda selama 2 detik
        digitalWrite(redLedPin, LOW);
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Enter Password:");
      }
      enteredPassword = ""; // Reset password yang dimasukkan
    } else if (key == '*') { // Tombol '*' untuk reset password
      enteredPassword = "";
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Enter Password:");
    } else {
      enteredPassword += key;
      lcd.setCursor(0, 1);
      lcd.print(enteredPassword);
    }
  }
}