#include <Keypad.h>
const int led = 12;
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

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

char Lcode[4], Lpass[4];
int i = 0;
char code[4] = "ABCD";

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
}

void loop() 
{

  char key = keypad.getKey();
  if (key != NO_KEY) 
 {
    if (key == code)
  { 
  digitalWrite(led, HIGH);;
  }
  Serial.print(key);
 }


}