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

LiquidCrystal_I2C lcd(0x27, 16, 2);
/////////////////////////////////////
#define in 14

#define out 19

#define relay 2

int count = 0;

void IN()

{

  count++;

  lcd.clear();

  lcd.print("Person In Room:");

  lcd.setCursor(0, 1);

  lcd.print(count);

  delay(1000);

}

void OUT()

{

  count--;

  lcd.clear();

  lcd.print("Person In Room:");

  lcd.setCursor(0, 1);

  lcd.print(count);

  delay(1000);

}

void setup()

{
  /////////////////////////////////////
  lcd.init();
  lcd.init();
  lcd.backlight();
  /////////////////////////////////////
  lcd.print("Visitor Counter");

  delay(2000);

  pinMode(in, INPUT);

  pinMode(out, INPUT);

  pinMode(relay, OUTPUT);

  lcd.clear();

  lcd.print("Person In Room:");

  lcd.setCursor(0, 1);

  lcd.print(count);

}

void loop()

{



  if (digitalRead(in))

    IN();

  if (digitalRead(out))

    OUT();



  if (count <= 0)

  {

    lcd.clear();

    digitalWrite(relay, LOW);

    lcd.clear();

    lcd.print("Nobody In Room");

    lcd.setCursor(0, 1);

    lcd.print("Light Is Off");

    delay(200);

  }



  else

    digitalWrite(relay, HIGH);



}