Arduino 按钮

按下亮灯，松开灭灯

int Red = 2;  // 红灯
int Button = 13; // 按钮
int buttonStatus = 0;

void setup() {
  pinMode(Red, OUTPUT);
  pinMode(Button, INPUT_PULLUP);
}

void loop() {
  buttonStatus = digitalRead(Button);

  // 按下亮灯，松开灭灯
  if (buttonStatus == HIGH) {
    digitalWrite(Red, HIGH);
  } else {
    digitalWrite(Red, LOW);
  }
}

按一下亮，再按来，依次循环

int Red = 2;  // 红灯
int Button = 13;
int buttonStatus = LOW;

void setup() {
  pinMode(Red, OUTPUT);
  pinMode(Button, INPUT_PULLUP);
}

void loop() {
  int s = digitalRead(Button);
  if (s == HIGH) {
    delay(100); // 等100毫秒后手按稳了再读取按钮状态
    if (s == digitalRead(Button)) {
      buttonStatus = !buttonStatus;
    }
  }
  if (buttonStatus == HIGH) {
    digitalWrite(Red, HIGH);
  } else {
    digitalWrite(Red, LOW);
  }
}