code: def refresh(self):
          
          j = self.vera_request(id='sdata', output_format='json').json()
          devices = j.get('devices')
          for device_data in devices:
              if device_data.get('id') == self.device_id:
                  self.update(device_data)
docs: Refresh the dev_info data used by get_value.
  
          Only needed if you're not using subscriptions.