code: def get_iss_info(self):
          
          self.write_data([self.ISS_CMD, self.ISS_VERSION])
          response = self.read_data(3)
          if len(response) == 3:
              response = self.decode(response)
              self.module = response[0]
              self.firmware = response[1]
              self._mode = response[2]
          else:
              raise USBISSError("Could not get version details")
docs: Get information about the USB-ISS
  
          Querying will return three bytes;
          - the module ID (7),
          - firmware version (currently 2),
          - the current operating mode.