#define trigPin 9
#define echoPin 10



void setup() {
  // put your setup code here, to run once;
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

}

void loop() {
  // put your setup code here, to run once;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  long durasi = pulseIn(echoPin, HIGH);
  int jarak = durasi * 0.034/2;

  Serial.print("jarak ; ");
  Serial.println(jarak);
  delay(1000);

}