code: async def stepper_config(self, steps_per_revolution, stepper_pins):
          
          data = [PrivateConstants.STEPPER_CONFIGURE, steps_per_revolution & 0x7f,
                  (steps_per_revolution >> 7) & 0x7f]
          for pin in range(len(stepper_pins)):
              data.append(stepper_pins[pin])
          await self._send_sysex(PrivateConstants.STEPPER_DATA, data)
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.