monitoring digital pins continuously

toolhead home position sketch

void setup() {
  //start serial connection
  Serial.begin(9600);
  //configure pin 2 as an input and enable the internal pull-up resistor
  pinMode(2, INPUT_PULLUP);
  pinMode(13, OUTPUT);

}

void loop() {
  //read the pushbutton value into a variable
  int toolheadHome = digitalRead(2);
  //print out the value of the pushbutton
  Serial.println(toolheadHome);

  digitalWrite(13, toolheadHome);

  if (toolheadHome == HIGH) {
    // good.
  } else{
    // send it home.
    
  }
}