#include <Keypad.h>

const byte ROWS = 4; // Four rows
const byte COLS = 4; // Four columns
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {18, 5, 17, 16}; // Connect to row pinouts of keypad
byte colPins[COLS] = {4, 0, 2, 15};   // Connect to column pinouts of keypad

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

String password = "1234"; // Set your password here
String enteredPassword = "";
const int ledPin = 19; // LED indicator

void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);
}

void loop() {
  char key = keypad.getKey();

  if (key) {
    Serial.print(key);
    
    if (key == '#') { // Check if entered password is correct
      if (enteredPassword == password) {
        Serial.println("\nAccess Granted!");
        digitalWrite(ledPin, HIGH);
      } else {
        Serial.println("\nAccess Denied!");
        digitalWrite(ledPin, LOW);
      }
      enteredPassword = ""; // Reset password entry
    } else if (key == '*') {
      enteredPassword = ""; // Reset password
      Serial.println("969140");
    } else {
      enteredPassword += key; // Append key to entered password
    }
  }
}
// Define the pin connected to the LED
const int ledPin = 13;

void setup() {
  // Initialize the digital pin as an output
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Turn the LED on
  digitalWrite(ledPin, HIGH);
  // Wait for 1 second
  delay(1000);
  // Turn the LED off
  digitalWrite(ledPin, LOW);
  // Wait for 1 second
  delay(1000);
}