//Muhammad Raqhib hamdi
//2021230037
//Unsada Teknologi Informasi
//Lab 4.4 ESP 32
//Kamis 4 April 2024
//Keypad untuk input password + LCD (Awalan bukan 0)
#include <Keypad.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const byte ROWS = 4;
const byte COLS = 4;

char Keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {13, 23, 19, 18};
byte colPins[COLS] = {5, 4, 2, 15};

Keypad customKeypad = Keypad(makeKeymap(Keys), rowPins, colPins, ROWS, COLS);

char inputKey;
int number = 0;
int password = 12345;

const int greenLED = 26; // pin untuk LED hijau
const int redLED = 27;   // pin untuk LED merah
const int buzzerPin = 25;   // pin untuk buzzer

void setup() {
  lcd.init();
  lcd.backlight();
  
  pinMode(greenLED, OUTPUT);
  pinMode(redLED, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  
  digitalWrite(greenLED, LOW); // Matikan LED hijau saat awal
  digitalWrite(redLED, LOW);   // Matikan LED merah saat awal
}

void loop() {
  lcd.setCursor(0, 0);
  lcd.print("Input Password");

  inputKey = customKeypad.getKey();

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

    case '#':
      if (number == password) {
        lcd.setCursor(0, 1);
        lcd.print("Access Accepted");
        delay(2000);
        number = 0;
        lcd.clear();
        
        digitalWrite(greenLED, HIGH); // Hidupkan LED hijau
        digitalWrite(redLED, LOW);    // Matikan LED merah
        noTone(buzzerPin);            // Matikan buzzer
      } else {
        lcd.setCursor(0, 1);
        lcd.print("Invalid Password");
        delay(2000);
        number = 0;
        lcd.clear();
        
        digitalWrite(greenLED, LOW);  // Matikan LED hijau
        digitalWrite(redLED, HIGH);   // Hidupkan LED merah
        tone(buzzerPin, 500);         // Bunyikan buzzer
        delay(2);                     // Tunggu 2 milidetik
        noTone(buzzerPin);            // Matikan buzzer
      }
      break;

    case '*':
      number = 0;
      lcd.clear();
      break;
  }
}