#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd (0x27,16,2);
int trigpin =2;
int echopin =3;
int jarak;
void setup () {
  pinMode (trigpin, OUTPUT);
  pinMode (echopin, INPUT);
  Serial. begin (9600);
  lcd.begin(16,2);
  lcd.init ();
  lcd.backlight ();
  lcd.setCursor(1,1);
  lcd.print("Sensor Ultrasonic");
  delay (2000);
  lcd.clear();
}

  void loop(){
    digitalWrite (trigpin, LOW );
    delayMicroseconds (2);
    digitalWrite (trigpin, HIGH ); 
    delayMicroseconds (10);
    digitalWrite (trigpin , LOW );
    int durasi = pulseIn ( echopin , HIGH );
    int jarak = durasi *0.034/2;
    
    lcd.setCursor (1,0);
    lcd.print (jarak );
    lcd.print ("cm");
  }