const int echoPin = 8;
const int trigPin = 7;

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

void loop(){
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  int durasiPantulan = pulseIn(echoPin, HIGH);
  float jarak = durasiPantulan * 0.034 / 2;
  float jarakM = jarak / 100;

  Serial.print("Jarak : ");
  Serial.print(jarak);
  Serial.print("cm ");
  Serial.print(jarakM);
  Serial.println("m");
}