#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C LCD 16x2
int buzzerPin = 8;
int greenLedPin = 9;
int redLedPin = 10;

String eKTP = ""; // Variabel untuk menyimpan nomor E-KTP yang dimasukkan

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);

  pinMode(buzzerPin, OUTPUT);
  pinMode(greenLedPin, OUTPUT);
  pinMode(redLedPin, OUTPUT);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Silahkan tempel");
  lcd.setCursor(0, 1);
  lcd.print("ktp anda");

  Serial.println("Masukkan No. E-KTP:"); // Mencetak pesan ke Serial Monitor
}

void loop() {
  while (Serial.available() > 0) {
    char c = Serial.read();
    if (c == '\n') { // Jika newline (baris baru) ditemukan
      processEKTP();
    } else {
      eKTP += c;
    }
  }
}

void processEKTP() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("No. E-KTP:");
  lcd.setCursor(0, 1);
  lcd.print(eKTP);

  // Check if eKTP is valid (you can implement your own validation logic)

  if (eKTP == "123") {
    lcd.setCursor(0, 1);
    lcd.print("Berhasil");
    digitalWrite(greenLedPin, HIGH);
    tone(buzzerPin, 1000, 1000); // Bunyikan buzzer selama 1 detik
    delay(2000); // Tunggu selama 2 detik
    digitalWrite(greenLedPin, LOW);
    noTone(buzzerPin);
  } else {
    lcd.setCursor(0, 1);
    lcd.print("Tidak berhasil");
    digitalWrite(redLedPin, HIGH);
    tone(buzzerPin, 5000, 1000); // Bunyikan buzzer selama 1 detik
    delay(2000); // Tunggu selama 2 detik
    digitalWrite(redLedPin, LOW);
    noTone(buzzerPin);
  }

  delay(5000); // Tampilkan pesan selama 5 detik

  // Clear the LCD and reset it
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Silahkan tempel");
  lcd.setCursor(0, 1);
  lcd.print("ktp anda");

  eKTP = ""; // Reset variabel nomor E-KTP
}