code: async def _send_scan_event(self, device):
          
  
          conn_string = str(device.iotile_id)
          info = {
              'connection_string': conn_string,
              'uuid': device.iotile_id,
              'signal_strength': 100,
              'validity_period': self.ExpirationTime
          }
  
          await self.notify_event(conn_string, 'device_seen', info)
docs: Send a scan event from a device.