아두이노 초음파 센서를 이용한 센서등

----------------------코드--------------------

#define TRIG 2

#define ECHO 3

void setup() {

  // put your setup code here, to run once:

  Serial.begin(9600);

  pinMode(TRIG, OUTPUT);

  pinMode(ECHO, INPUT);

  pinMode(7, OUTPUT);

}

void loop() {

  // put your main code here, to run repeatedly:

  

  digitalWrite(TRIG, LOW);

  delayMicroseconds(2);

  digitalWrite(TRIG, HIGH);

  delayMicroseconds(10);

  digitalWrite(TRIG, LOW);

 

  long distance = pulseIn(ECHO, HIGH) / 58.2;

  Serial.println(distance);

  if(distance < 10){

    digitalWrite(7, HIGH); //  거리 10보다 가까워지면 켜짐

  } else {

    digitalWrite(7, LOW); // 아니면 꺼짐

  }

  }