pcom_serial.py 文件源码

def get_property_desc(self, to, requested_property_id):
        """
        Sends a message to the embedded board requesting the property description for a specified
        property ID

        :param to: item ID to send the message to
        :param requested_property_id: property ID to get the description of
        :return:
        """
        try:
            response = yield self.send_command(to, command_id=GET_PROPERTY_DESC, params=["property_id"],
                                               data=[requested_property_id])
        except Exception as e:
            logger.error("[PCOM] Unable to find property description for property {0} in item {1} because of exception:"
                         "{2}".format(requested_property_id, to, e))
            defer.returnValue(None)
        try:
            defer.returnValue(response.data[0])
        except IndexError:
            logger.error("Response from embedded board during discovery sequence did not return data in expect format."
                         " Expected at least one data field, received: {0}".format(response.data))
            defer.returnValue(None)