Keypad.ino

#include <Password.h>
#include <Keypad.h>

#define led 5

const byte ROWS = 4; 
//four rows
const byte COLS = 4; 
//four columns
//define the cymbols on the buttons of the keypads
char hexaKeys[ROWS][COLS] = {
	{'1','2','3','A'},
	{'4','5','6','B'},
	{'7','8','9','B'},
	{'*','0','#','D'}
};
byte rowPins[ROWS] = {13, 12, 11, 10}; 
//connect to the row pinouts of the keypad
byte colPins[COLS] = {9, 8, 7, 6}; 
//connect to the column pinouts of the keypad
//initialize an instance of class NewKeypad
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 
Password password = Password("1234");

void setup() {
	// put your setup code here, to run once:
  pinMode(5, OUTPUT);
	Serial.begin(9600);
}

void loop() {
	// put your main code here, to run repeatedly:
	char customKey = customKeypad.getKey();
  
  
	if (customKey){
		Serial.print(customKey);
    password.append(customKey);
    
    if (password.evaluate()) {
      password.reset();
      Serial.println("CODE IS CORRECT");
      digitalWrite(5, HIGH);
      delay(1000);
      digitalWrite(5, LOW);
    } else {
      Serial.println("CODE IS NOT CORRECT");
    }
	}
}