HC-SR04P 초음파 거리 센서 알아보기 [아두이노 강좌]

 //소스 코드 다운 링크

​

​int trigPin = 13;
int echoPin = 12;

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 * 17 / 1000;
  Serial.println(distance);
  delay(100);
}