Membuat Sensor Jarak Menggunakan HCSR04 dan Arduino Uno

const int trigPin = 9;
const int echoPin = 10;
long duration;
int distance;


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

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

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

  duration = pulseIn(echoPin, HIGH);

  distance = duration*0.034/2;

  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" CM ");
}