#define SERIAL_SPEED 9600

const int buttonPin = 12;
const int ledPin = 25;  

int buttonState, prev_buttonState;
int ledState;

unsigned long last_DebounceTime = 0;
unsigned long debounce_delay = 50;

void setup() {
  // Configuracion de puertos
  pinMode(ledPin, OUTPUT);
  Serial.begin(SERIAL_SPEED);
  // Inicializacion de variables
  buttonState = 0;
  ledState = LOW;
  digitalWrite(ledPin, ledState);
  prev_buttonState = buttonState;
  // Iniciacion del puerto serial  
  Serial.println("Inicio...");
}

void loop() {
  buttonState = digitalRead(buttonPin);
  delay(debounce_delay);
  if (buttonState != prev_buttonState) {
    // Transición (positiva o negativa)
    // Serial.println("[T]");
    if (buttonState == HIGH) {
      // Transición positiva
      Serial.print("[T+]-> Led:");
      Serial.println(ledState);
      ledState = !ledState;
      digitalWrite(ledPin, ledState);
    }
  }
  prev_buttonState = buttonState;
}