docs: def sync(self):
          """Retrieve panel information from ElkM1"""
          self._elk.add_handler('VN', self._vn_handler)
          self._elk.add_handler('XK', self._xk_handler)
          self._elk.add_handler('RP', self._rp_handler)
          self._elk.add_handler('IE', self._elk.call_sync_handlers)
          self._elk.add_handler('SS', self._ss_handler)
          self._elk.send(vn_encode())
          self._elk.send(lw_encode())
          self._elk.send(ss_encode())