int boton = 23;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(96000);
  pinMode(boton, INPUT_PULLDOWN);
}

void loop() {
  int estadoBoton;
  estadoBoton = digitalRead(boton);
  delay(300); // this speeds up the simulation

  if(estadoBoton == HIGH);
  Serial.println("boton pulsado");
}