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

int pos = 0;
int toggle = 0;

const int ROW_NUM    = 4;
const int COLUMN_NUM = 4;

char keys[ROW_NUM][COLUMN_NUM] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte pin_rows[ROW_NUM] = {9, 8, 7, 6};
byte pin_column[COLUMN_NUM] = {5, 4, 3, 2};

Keypad keypad = Keypad(makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo servo;

String v_passcode = "";

int cursorColumn = 0;

void setup() {
  lcd.init();
  lcd.backlight();
  Serial.begin(9600);
  servo.attach(10);
  servo.write(0);
  lcd.setCursor(0, 0);
}

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

  if (key != NO_KEY) {



    if (key) {
      lcd.setCursor(cursorColumn, 0);
      lcd.print(key);

      if (key == 'A')
      {
        lcd.setCursor(cursorColumn, 0);
        lcd.print("Enter Password");
        delay(1000);
        lcd.clear();
        lcd.setCursor(0, 0);
        v_passcode = "";
      } else if (key == '*')
      {
        lcd.clear();
        lcd.setCursor(0, 0);
        cursorColumn = 0;
        //lcd.home();
      } else if (key == '#')
      {
        if (v_passcode == "2674")
        {
          lcd.clear();
          lcd.setCursor(0, 0);
          lcd.print("Open.");
          servo.write(90);
          delay(10000);
          lcd.clear();
          lcd.setCursor(0, 0);
          lcd.print("Close.");
          servo.write(0);
          delay(1000);
          lcd.clear();
          lcd.setCursor(0, 0);
        } else {
          lcd.clear();
          lcd.setCursor(0, 0);
          lcd.print("wrong pass");
        }
      } else {
        v_passcode = v_passcode + key;
        cursorColumn++;
        if (cursorColumn == 10) {
          lcd.clear();
          cursorColumn = 0;
         
        }
      }




    }
  }
}