code: def stepper_config(self, steps_per_revolution, stepper_pins):
          
          task = asyncio.ensure_future(self.core.stepper_config(steps_per_revolution,
                                                                stepper_pins))
          self.loop.run_until_complete(task)
docs: Configure stepper motor prior to operation.
          This is a FirmataPlus feature.
  
          :param steps_per_revolution: number of steps per motor revolution
  
          :param stepper_pins: a list of control pin numbers - either 4 or 2
  
          :returns: No return value