code: def ping(self, remote):
          
          try:
              self.proxies["%s-%s" % (self._interface_id, remote)].ping("%s-%s" % (self._interface_id, remote))
          except Exception as err:
              LOG.warning("ServerThread.ping: Exception: %s" % str(err))
docs: Send ping to CCU/Homegear to generate PONG event