Program Dasar Deteksi Jarak HC-SR04

// -------------------------------------------
// Program Dasar Deteksi Jarak HC-SR04
// www.ardukode.blogspot.com
// -------------------------------------------

const int trigPin = 9;
const int echoPin = 10;

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

void loop() {
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration * 0.034) / 2;
  Serial.print("Jarak: ");
  Serial.print(distance);
  Serial.println(" cm");
  delay(1000);
}