code: func (e *Adaptor) DigitalWrite(pin string, val byte) (err error) {
  	sysfsPin, err := e.DigitalPin(pin, "out")
  	if err != nil {
  		return
  	}
  	return sysfsPin.Write(int(val))
  }
docs: // DigitalWrite writes a value to the pin. Acceptable values are 1 or 0.