#include <LiquidCrystal_I2C.h>

// Inisialisasi LCD dengan alamat I2C dan ukuran 16x2
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  pinMode(3, OUTPUT);
  pinMode(2, INPUT);
  lcd.init();
  lcd.backlight();
  lcd.clear();
}

void loop() {
  digitalWrite(3, LOW);
  delayMicroseconds(2);
  digitalWrite(3, HIGH);
  delayMicroseconds(10);
  digitalWrite(3, LOW);

  int waktu = pulseIn(2, HIGH);
  float jarak = waktu * 0.034 / 2;

  lcd.setCursor(0, 0);
  lcd.print("Jarak: ");
  lcd.print(jarak);
  lcd.print(" CM ");
  
  lcd.setCursor(0, 1);
  if (jarak < 100) {
    lcd.print("Jaga Jarak ta");
  } else {
    lcd.print("Aman, Bosku");
  }
  delay(100);
}