code: def hardware_version(self):
          
  
          hardware_string = self.hardware_string
  
          if not isinstance(hardware_string, bytes):
              hardware_string = self.hardware_string.encode('utf-8')
  
          if len(hardware_string) > 10:
              self._logger.warn("Truncating hardware string that was longer than 10 bytes: %s", self.hardware_string)
  
          if len(hardware_string) < 10:
              hardware_string += b'\0'*(10 - len(hardware_string))
  
          return [hardware_string]
docs: Get a hardware identification string.