#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 Utrasonik");
 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");

}