#define trigPin 9
#define echoPin 10



void setup() {
  // put 
    Serial.begin(9600);
    pinMode(trigPin, OUTPUT);
    pinMode(echoPin, INPUT);

}

void loop() {
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);

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

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