void setup() {
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  static boolean estadoLed = false;
  estadoLed = !estadoLed;
  digitalWrite(LED_BUILTIN, estadoLed ? HIGH : LOW);
  
// ---------------'
  if (digitalRead(LED_BUILTIN) == HIGH) {
    Serial.println("LED encendido");
  } else {
    Serial.println("LED apagado");
  }
// ---------------'

  delay(1000);
}