#include <Keypad.h>
#include <LiquidCrystal.h>

// Define LCD pins (RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(19, 23, 18, 17, 16, 15);

// Keypad setup
const byte ROWS = 4; // Number of rows
const byte COLS = 4; // Number of columns
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {13, 12, 14, 27}; // Row pins connected to keypad
byte colPins[COLS] = {26, 25, 33, 32}; // Column pins connected to keypad

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);

  // Initialize LCD
  lcd.begin(16, 2); // 16 columns, 2 rows
  lcd.print("Keypad Ready"); // Display initialization message
  delay(2000); // Wait for 2 seconds
  lcd.clear();
}

void loop() {
  // Check for key press
  char key = keypad.getKey();

  if (key) { // If a key is pressed
    // Print the key to the Serial Monitor
    Serial.print("Key Pressed: ");
    Serial.println(key);

    // Display the key on the LCD
    lcd.clear();
    lcd.setCursor(0, 0); // Set cursor to the first row
    lcd.print("Key: ");
    lcd.print(key);
  }

  delay(200); // Short delay for key press debounce
}