code: def getValue(self, key):
          
          LOG.debug("HMGeneric.getValue: address = '%s', key = '%s'" % (self._ADDRESS, key))
          try:
              returnvalue = self._proxy.getValue(self._ADDRESS, key)
              self._VALUES[key] = returnvalue
              return returnvalue
          except Exception as err:
              LOG.warning("HMGeneric.getValue: %s on %s Exception: %s", key,
                          self._ADDRESS, err)
              return False
docs: Some devices allow to directly get values for specific parameters.