#include <LiquidCrystal_I2C.h>

// Constant
#define PIN_TRIG 4
#define PIN_ECHO 3
#define PIR_OUT 2

// Initialize LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  // Initialize LCD
  lcd.init();
  lcd.backlight();

  // Pinmode declaration
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
  pinMode(PIR_OUT, INPUT);
}

void loop() {
  // Measure distance
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(200);
  digitalWrite(PIN_TRIG, LOW);

  // Process Sensor
  if (digitalRead(PIR_OUT)) {
    lcd.setCursor(6,1);
    lcd.print("OUT");
  } else if ((pulseIn(PIN_ECHO, HIGH) / 58) <= 170) {
    lcd.setCursor(7,0);
    lcd.print("IN");
  }

  delay((1/120)*1000);
  lcd.clear();
}