int ledPin = 13; // LED는 디지털 핀 13에 연결됨
int inPin = 7; // pushbutton은 디지털 핀 7에 연결됨
int val = 0; // 읽은 값을 저장할 변수
void setup() {
pinMode(ledPin, OUTPUT); //디지털 핀 13을 출력으로 설정
pinMode(inPin, INPUT); // 디지털 7을 입력으로 설정
}
void loop() {
val = digitalRead(inPin); // 입력 핀으로부터 읽기
digitalWrite(ledPin, val); // LED 를 버튼의 값으로 설정
}
주의와 경고
핀이 아무데도 연결되지 않으면, digitalRead()은 HIGH나 LOW 중 아무 값이나 임의로 반환할 수 있습니다.
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