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

const byte key_row = 4;
const byte key_col = 4;

byte row_pins[key_row] = {3, 4, 5, 6};
byte col_pins[key_col] = {8, 9, 10, 11};

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

// Create the Keypad object globally
Keypad keyy = Keypad(makeKeymap(keys), row_pins, col_pins, key_row, key_col);
LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust the I2C address if necessary

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2); // Initialize the LCD with 16 columns and 2 rows
  lcd.backlight(); // Turn on the backlight
  lcd.print("Ready"); // Initial message
}

void loop() {
  char pressedKey = keyy.getKey();
  
  if (pressedKey) { // Check if a key was pressed
    Serial.println(pressedKey); // Print the key value
    lcd.clear();
    lcd.println(pressedKey); // Display the pressed key on the LCD
  }
}