int inputPin = 12; // Input an Pin12
int buttonState = 0; // Zustand des Buttons

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Check the State of the Button");
  pinMode(inputPin, INPUT);
}

void loop() {
  // lies den Zustand des Buttons aus
  buttonState = digitalRead(inputPin);
  Serial.println(buttonState);

  delay(100); // 10 mal pro Sekunde
}