#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>

// Create an LCD object using I2C address (0x27 is the default address for most LCDs)
LiquidCrystal_I2C lcd(0x27, 16, 2); 

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

int buttonPin = 2;  // Pin where the pushbutton is connected
int ledPin = 13;    // Pin where the LED is connected
int buttonState = 0;  // Variable to store the pushbutton state
int lockPosition = 0;  // Variable to store the current position of the lock
int buzzer=10;

void setup() {
  lockServo.attach(9);  // Attach the servo control pin to pin 9
  pinMode(buttonPin, INPUT);  // Set the button pin as input
  pinMode(ledPin, OUTPUT);    // Set the LED pin as output
  pinMode(buzzer, OUTPUT);    // Set the LED pin as output
  
  lockServo.write(lockPosition);  // Initially, set the lock to unlocked (0°)
  digitalWrite(ledPin, LOW);  // Turn off the LED initially
  digitalWrite(buzzer, LOW);
  lcd.begin(16, 2);  // Initialize the LCD with 16 columns and 2 rows
  lcd.setBacklight(1);  // Turn on the LCD backlight
  lcd.print("Lock Status:");  // Print the label
}

void loop() {
  buttonState = digitalRead(buttonPin);  // Read the state of the button

  if (buttonState == HIGH) {  // If the button is pressed
    if (lockPosition == 0) {
      lockPosition = 90;  // Lock the mechanism (90°)
      digitalWrite(ledPin, HIGH);  // Turn the LED on (locked state)
      digitalWrite(buzzer, HIGH);
      lcd.setCursor(0, 1);  // Move cursor to the second line
      lcd.print("Locked       ");  // Display "Locked"
    } else {
      lockPosition = 0;  // Unlock the mechanism (0°)
      digitalWrite(ledPin, LOW);  // Turn the LED off (unlocked state)
      digitalWrite(buzzer, LOW);
      lcd.setCursor(0, 1);  // Move cursor to the second line
      lcd.print("Unlocked     ");  // Display "Unlocked"
    }
    lockServo.write(lockPosition);  // Rotate the servo to the new position
    delay(500);  // Debounce delay for the button press
  }
}