#include <Keypad.h>
#include <Servo.h>
#include <LiquidCrystal.h>
#include "pitches.h"

const int ROWS = 4; // Number of rows on the keypad
const int COLS = 4; // Number of columns on the keypad
int i = 0;
int buzzerPin = 1;
// Define the keypad pins
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {5, 4, 3, 2}; // Connect keypad row pins to these Arduino pins
byte colPins[COLS] = {A3, A2, A1, A0}; // Connect keypad column pins to these Arduino pins

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

Servo myServo; // Create a Servo object to control the servo motor

LiquidCrystal lcd(12, 11, 10, 9, 8, 7); // Create an LCD object to display the password input and status

char password[] = "1234"; // Set the password

void setup() {
  lcd.begin(16, 2); // Initialize the LCD
  myServo.attach(6); // Attach the servo motor to pin 9
  pinMode(buzzerPin, OUTPUT);
  
}

void loop() {
  lcd.clear(); // Clear the LCD
  lcd.print("Enter Password:"); // Display message on the LCD
  delay(500);
int pitch = 1;
  String enteredPassword = ""; // Initialize a string to hold the entered password

  while (enteredPassword.length() < 4) { // Read input until the password length is 4
    char key = keypad.getKey(); // Read a key from the keypad
    if (key) { // If a key is pressed
    enteredPassword += key;
      lcd.setCursor(0, 1); // Move the cursor to the second line of the LCD
      lcd.print(enteredPassword); // Print a '*' to indicate a key has been pressed
       // Add the pressed key to the entered password
      delay(100); // Delay to avoid reading multiple keys
    }
  }

  //delay(500); // Delay to allow the user to release the last key

  if (enteredPassword == password) { // If the entered password matches the set password
    lcd.clear(); // Clear the LCD
    lcd.print("Password Correct!"); // Display message on the LCD
    myServo.write(0); // Open the door
    delay(2000); // Wait for 2 seconds
    myServo.write(90); // Close the door
  } else { // If the entered password does not match the set password
    lcd.clear(); // Clear the LCD
    lcd.print("Password Incorrect!"); // Display message on the LCD
    i++;
  }
  if (i>=3) { // If the entered password matches the set password
    lcd.clear(); // Clear the LCD
    lcd.print("Password inCorrect!"); // Display message on the LCD
     lcd.setCursor(0, 1); // Move the cursor to the second line of the LCD
    lcd.print("warning");
      digitalWrite(buzzerPin, HIGH); // turn the buzzer on
  delay(1000); // wait for 1 second
  }
  delay(2000); // Delay to allow the user to read the LCD message
}