#include <SoftwareSerial.h>
SoftwareSerial BlueTooth(12, 13);
#include<LiquidCrystal_I2C.h>
#include<Keypad.h>
#include <Servo.h>
#define buzzerPin 10
#define servoPin 11
LiquidCrystal_I2C lcd(0x27,16,2);
const byte ROWS = 4;
const byte COLS = 3;
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
byte rowPins[ROWS] = {9, 8, 7, 6};
byte colPins[COLS] = {5, 4, 3};
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
char storepass[]="2004";
char DoorOpen= 'a';
char DoorLock= 'b';
unsigned short int i=0,count=0,number=sizeof(storepass)-1;
char pass[sizeof(storepass)-1];
unsigned short int inputpass=2004;
Servo myServo;
char inputpassword;
unsigned char countwrong=0;
char key;
void WrongPass()
{
 tone(buzzerPin,1000);
 delay(100);
 noTone(buzzerPin);
 lcd.clear();
 lcd.setCursor(0,0); 
 lcd.print("Wrong Password");
 delay(2000);
 i=0;
 count=0;
 lcd.setCursor(0,0);
 lcd.print("Enter the Pass.");
 lcd.setCursor(0,1);
 countwrong++;
}
void Opendoor()
{
 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("Correct Password");
 delay(2000);
 i=0;
 count=0;
 lcd.setCursor(0,0);
 myServo.write(100);
 delay(3000);
 lcd.print("Welcome Doctor! ");
 delay(2000);
 myServo.write(0);
 lcd.clear();
 delay(2000);
 lcd.print("Enter the Pass. ");
 countwrong=0;
 lcd.setCursor(0,1);
 if (key>='0'&&key!='#')
  {
    lcd.print('*');
    pass[i]=key;
    i++;
  }
}
void Doorclosed()
{
 lcd.clear();
 lcd.setCursor(0,0);
 lcd.print("DOOR CLOSED!    ");
 delay(2000);
 i=0;
 count=0;
 lcd.setCursor(0,0);
 lcd.clear();
 myServo.write(0);
 delay(2000);
 lcd.print("Enter the Pass. ");
 countwrong=0;
}
void setup() 
{
 BlueTooth.begin(9600);
 BlueTooth.println("Enter the Pass. ");
 lcd.begin(16,2);
 lcd.print("Enter the Pass. ");
 lcd.setCursor(0, 1);
 lcd.backlight();
 pinMode(buzzerPin,OUTPUT);
 myServo.attach(servoPin);
}

void loop() {
  if (BlueTooth.available())
  {
    inputpassword=BlueTooth.read();
    if(inputpassword==DoorOpen)
    {
        Opendoor();
        inputpassword='a';
        //Open Ring
    }
    else if(inputpassword==DoorLock)
    {
        Doorclosed();
        inputpassword='b';
        //Closed Ring
    }
  }
  myServo.write(0);
  delay(15);
  char key = keypad.getKey();
  if (key>='0'&&key!='#')
  {
    lcd.print('*');
    pass[i]=key;
    i++;
  }
  else if(key=='#')
  {
    if(i==number)
    {
      for(short int j=0;j<number;j++)
      {
        if(pass[j]==storepass[j])count++;
      }
      if(count==number)
      {
        Opendoor();
      }
      else
        WrongPass();
    }else
      WrongPass();
  }
  if(countwrong==3)
  {
     tone(buzzerPin,1000);
     delay(3000);
     noTone(buzzerPin);
     countwrong=0;
  }
}