#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 ultrasonik");
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") ;
}