Mixly按键控制LED灯

Mixly按键控制LED 灯。
Mixly模块如下所示：

代码：

volatile byte LED;
volatile byte SW;
volatile boolean b1;
volatile boolean b2;
volatile byte click;
volatile boolean lastState;
volatile boolean toggle;

int mixly_digitalRead(uint8_t pin) {
  pinMode(pin, INPUT);
  return digitalRead(pin);
}

void setup(){
  LED = 13;
  SW = 8;
  lastState = LOW;
  toggle = LOW;
  click = 0;
  pinMode(LED, OUTPUT);
  digitalWrite(LED,LOW);
  b1 = mixly_digitalRead(SW);
  b2 = mixly_digitalRead(SW);
}

void loop(){
  lastState = mixly_digitalRead(SW);

  if (b1 != lastState) {
    delay(20);
    if (b1 == b2) {
      lastState = b1;
      click = click + 1;

    }

  }
  if (click == 2) {
    click = 0;
    toggle = !toggle;
    pinMode(LED, OUTPUT);
    digitalWrite(LED,toggle);

  }

}

实现效果：
初始灯是灭的
当按一次按键，灯亮

再按一次按键，灯灭

来源：https://blog.csdn.net/rxx980608/article/details/102730245