#include <Arduino.h>
#include <Keypad.h>

const int ledPin = 4; // Built-in LED on many ESP32 boards, change if using an external LED
const String correctPassword = "1234"; // Set your desired password here

// Keypad configuration
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] = {5, 18, 19, 21}; // Connect to row pins
byte colPins[COLS] = {22, 23, 32, 33 }; // Connect to column pins

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

String inputPassword = "";

void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW); // Ensure LED is off initially
}

void loop() {
  char key = keypad.getKey();
  
  if (key) {
    if (key == '#') { // Assuming '#' is used to submit the password
      if (inputPassword == correctPassword) {
        Serial.println("Password correct! Turning on the LED.");
        digitalWrite(ledPin, HIGH); // Turn on the LED
        delay(5000); // Keep the LED on for 5 seconds
        digitalWrite(ledPin, LOW); // Turn off the LED
      } else {
        Serial.println("Incorrect password. Try again.");
      }
      inputPassword = ""; // Clear the input after checking
    } else if (key == '*') { // Assuming '*' is used to clear the input
      inputPassword = "";
      Serial.println("Input cleared.");
    } else {
      inputPassword += key; // Append the key to the input password
      Serial.print("Current input: ");
      Serial.println(inputPassword);
    }
  }
}