/*
  MSJ Researchers World
  Date - 28th OCT 2024
  Mentor - Mr. Siranjeevi M
  Contact - 7373771991
*/

#include <Keypad.h>

// Define the number of rows and columns in the keypad
const byte ROWS = 4;
const byte COLS = 4;

// Define the keymap (as per your keypad layout)
char keys[ROWS][COLS] = 
{
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

// Connect keypad rows and columns to Arduino pins
byte rowPins[ROWS] = {4, 5, 6, 7};  // Rows: R1, R2, R3, R4
byte colPins[COLS] = {8, 9, 10, 11};  // Columns: C1, C2, C3, C4

// Create an instance of the Keypad library
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() 
{
  Serial.begin(9600);  // Initialize serial communication
}

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

  if (key) 
  {  // If a key is pressed
    Serial.print("Key Pressed: ");
    Serial.println(key);
  }
}