code: def recv(self, timeout=None):
          
          message = self._recv(timeout)
          if message and message.type == "urn:nfc:wkt:Hs":
              log.debug("received '{0}' message".format(message.type))
              return nfc.ndef.HandoverSelectMessage(message)
          else:
              log.error("received invalid message type {0}".format(message.type))
              return None
docs: Receive a handover select message from the remote server.