const int buttonPin = D8;
const int ledPin = D0;

int buttonState = 0;
int lastButtonState = 0;

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
  Serial.begin(115200);
}

// the loop function runs over and over again forever
void loop() {
  buttonState = digitalRead(buttonPin);

Serial.println(buttonState);
  if (buttonState == HIGH)
  {
    digitalWrite(ledPin, HIGH);
  }
  else
  {
//    Serial.println(0);
    digitalWrite(ledPin, LOW);
  }
}