Put the frame into the _rx_frames dict with a key of the frame_id.

def _frame_received(self, frame):
        """
        Put the frame into the _rx_frames dict with a key of the frame_id.
        """
        try:
            self._rx_frames[frame["frame_id"]] = frame
        except KeyError:
            # Has no frame_id, ignore?
            pass
        _LOGGER.debug("Frame received: %s", frame)
        # Give the frame to any interested functions
        for handler in self._rx_handlers:
            handler(frame)