#define echo 2
#define trig 3
long duration, distance;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  
  digitalWrite(trig, LOW);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  duration = pulseIn(echo, HIGH);

  distance = duration * 0.0344 / 2;

  Serial.print("Jarak : ");
  Serial.print(distance);
  Serial.println("cm");

  delay(100);
}