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

LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // initialize the library with the numbers of the interface pins
Servo servoMotor; // create servo object to control a servo

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] = {9, 8, 7, 6}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {5, 4, 3, 2}; //connect to the column pinouts of the keypad
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

int servoPin = 10; // Servo control pin
bool isServoOn = false; // to keep track of servo status
bool isLocked = true; // to check if the system is locked
unsigned long previousMillis = 0; // store the last time the servo was turned on

void setup() {
  lcd.begin(16, 2); // set up the LCD's number of columns and rows
  servoMotor.attach(servoPin); // attaches the servo on pin 10 to the servo object
  lcd.print("Enter password:"); // Display initial message
}

void loop() {
  if (isLocked) {
    char key = keypad.getKey();
    if (key) {
      if (key == '123') {
        isLocked = false;
        lcd.clear();
        lcd.print("Unlocked");
        delay(1000);
        lcd.clear();
      } else {
        lcd.setCursor(0, 1);
        lcd.print("Wrong password");
        delay(1000);
        lcd.clear();
        lcd.print("Enter password:");
      }
    }
  } else {
    unsigned long currentMillis = millis();
    if (!isServoOn) {
      if (currentMillis - previousMillis >= 60000) { // 1 minute in milliseconds
        isServoOn = true;
        previousMillis = currentMillis;
      }
    } else {
      lcd.clear();
      lcd.print("Servo: ON");
      servoMotor.write(90); // set the servo position to 90 degrees
      isServoOn = false;
    }
  }
}