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

// Inisialisasi LCD
LiquidCrystal_I2C lcd(0x27, 20, 4);

// Inisialisasi Keypad
const byte ROW_NUM    = 4; // jumlah baris pada keypad
const byte COLUMN_NUM = 4; // jumlah kolom pada keypad

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

byte pin_rows[ROW_NUM] = {9, 8, 7, 6}; // define pin untuk baris
byte pin_column[COLUMN_NUM] = {5, 4, 3, 2}; // define pin untuk kolom

int number;

Keypad keypad = Keypad(makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM);

void setup() {
  lcd.begin(20, 4); // inisialisasi LCD 20x4
  lcd.setBacklight(LOW); // Matikan backlight LCD

  lcd.setCursor(0, 0);
  lcd.print("Pilih Menu Makanan");
  delay(2000);
  lcd.clear();
}

void loop() {
  lcd.setCursor(0, 0);
  lcd.print("1. Nasi Goreng");
  lcd.setCursor(0, 1);
  lcd.print("2. Bakmi");
  lcd.setCursor(0, 2);
  lcd.print("3. Capjay");

  char key = keypad.getKey();
  number = key;
  switch(number) {
    case '1':
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Anda memilih menu: 1 ");
    lcd.setCursor(0, 1);
    lcd.print("Menu: Nasi Goreng ");
    lcd.setCursor(0, 2);
    lcd.print("Harga: 10.000 ");
    delay(2000);
    lcd.clear();
    break;
  }
  switch(number) {
    case '2':
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Anda memilih menu: 2 ");
    lcd.setCursor(0, 1);
    lcd.print("Menu: Bakmi ");
    lcd.setCursor(0, 2);
    lcd.print("Harga: 15.000 ");
    delay(2000);
    lcd.clear();
    break;
  }
  switch(number) {
    case '3':
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Anda memilih menu: 3 ");
    lcd.setCursor(0, 1);
    lcd.print("Menu: Capjay ");
    lcd.setCursor(0, 2);
    lcd.print("Harga: 20.000 ");
    delay(2000);
    lcd.clear();
    break;
  }
 
}