HolaMundoBlink.ino

// the setup function runs once when you press reset or power the board
void setup() {
  Serial.begin(9600); 
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT); // LED_BUILTIN / 13

  digitalWrite(LED_BUILTIN, HIGH);
  delay(2000);

  Serial.println("HOLA MUNDO"); 
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, LOW);   // turn the LED on (HIGH is the voltage level)  / 0
  Serial.println("APAGADO"); 
  delay(500);
  encender(LED_BUILTIN);  // turn the LED off by making the voltage LOW   / 1
  Serial.println("ENCENDIDO"); 
  delay(500);
}

void encender(int numero_pin){
  digitalWrite(numero_pin, HIGH);  
}