Arduino 按鈕

參考資料
https://www.youtube.com/watch?v=JNk7u7Z5IMw

目的：
按下按鈕，LED亮；放開按鈕，LED滅。






const int buttonPin = 2;
const int ledPin =  13;
int buttonState = 0;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
}

void loop() {



  buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }



}