#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
int trig = 12; // membuat variabel trig yang di set ke-pin 12
int echo = 13;        
long durasi, jarak;     

void setup() {
pinMode (trig, OUTPUT);  
pinMode (echo, INPUT);
Serial.begin(9600);
lcd.init();
lcd.backlight();      
}

void loop() {
  digitalWrite(trig,LOW);
  delayMicroseconds(8);
  digitalWrite(trig,HIGH);
  delayMicroseconds(8);
  digitalWrite(trig,LOW);
  delayMicroseconds(8);

  durasi = pulseIn(echo, HIGH); // menerima suara ultrasonic
  jarak = (durasi / 2) / 29.1;
  // mengubah durasi menjadi jarak (cm)
  Serial.print("Nilai Durasi = ");
  Serial.println(durasi);
  Serial.print("Jarak = ");
  Serial.print(jarak);        // menampilkan jarak pada Serial Monitor
  Serial.println(" cm ");
lcd.setCursor(4,0);
lcd.print ("hasil Jarak = "); 
lcd.setCursor(0,1);
lcd.print(jarak);
lcd.print (" cm ");
delay(200);
}