#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 main code here, to run repeatedly:
digitalWrite(trigPin, LOW);
delayMicroseconds(2);

digitalWrite(trigPin,HIGH);
delayMicroseconds(10);

digitalWrite(trigPin, LOW);

long durasi = pulseIn(echoPin, HIGH);
int jarak = durasi * 0.03421/2;

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