#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int trig = 10;
const int echo = 9;

long waktu;
int jarak;

void setup() {
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  lcd.init();
  lcd.backlight();

}

void loop() {
  lcd.setCursor(0, 0);
  lcd.println("ALAT UKUR JARAK");
  delay(200);

  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

  waktu = pulseIn(echo, HIGH);

  jarak = waktu * 0.034 / 2;
  
  lcd.setCursor(0, 1);
  lcd.println(jarak);
  lcd.println("cm");
  
delayMicroseconds(1);

}