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

LiquidCrystal_I2C lcd(0x27, 16, 2);  

const int irSensorPin1 = A0;  
const int irSensorPin2 = A1;  

int count = 0;                  
int lastIrSensor1State = LOW;   
int lastIrSensor2State = LOW;   
void setup() {
  pinMode(irSensorPin1, INPUT);  
  pinMode(irSensorPin2, INPUT);  
  
  lcd.init();                      
  lcd.backlight();                
  lcd.setCursor(0, 0);
  lcd.print("Person In Room:");   
}

void loop() {
  
  int irSensor1State = digitalRead(irSensorPin1);
  int irSensor2State = digitalRead(irSensorPin2);
  
  if (irSensor1State == HIGH && lastIrSensor1State == LOW && irSensor2State == HIGH) {
    count++;  
    }
  if (irSensor2State == HIGH && lastIrSensor2State == LOW && irSensor1State == HIGH) {
    count--;  
  }
  
  lastIrSensor1State = irSensor1State;
  lastIrSensor2State = irSensor2State;
  
  lcd.setCursor(0, 1);             
  lcd.print(count);                
  delay(50);                      
}