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

char inputFromSerial;

void setup() {
  lcd.begin();
  Serial.begin(115200);
  Serial.println("Masukkan Pilihan [1, 2, 3] : ");
}

void loop() {
  if (Serial.available() > 0) {
    inputFromSerial = Serial.read();
    int pilihan = inputFromSerial - '0';  // Convert char to int

    switch (pilihan) {
      case 1:
        home();
        break;
      case 2:
        about();
        break;
      case 3:
        contact();
        break;
      default:
        Serial.println("Pilihan tidak valid!");
        break;
    }

    menu();  // Update LCD display after reading input
  }

  delay(1000);
}

void menu() {
  int pilihan = inputFromSerial - '0';  // Convert char to int

  switch (pilihan) {
    case 1:
      home();
      break;
    case 2:
      about();
      break;
    case 3:
      contact();
      break;
    default:
      break;
  }
}

void home() {
  lcd.clear();
  lcd.setCursor(8, 0);
  lcd.print("1");
  lcd.setCursor(8, 1);
  lcd.print("Home");
}

void about() {
  lcd.clear();
  lcd.setCursor(8, 0);
  lcd.print("2");
  lcd.setCursor(8, 1);
  lcd.print("About");
}

void contact() {
  lcd.clear();
  lcd.setCursor(8, 0);
  lcd.print("3");
  lcd.setCursor(8, 1);
  lcd.print("Contact Us");
}