code: def device_info(self):
          
          info = {
              'serial': self.serial,
              'model': self.model,
              'build_info': self.build_info,
              'user_added_info': self._user_added_device_info
          }
          return info
docs: Information to be pulled into controller info.
  
          The latest serial, model, and build_info are included. Additional info
          can be added via `add_device_info`.