I am looking to implement the Zigbee Time cluster on our ZigBee Coordinator, which runs ha-gateway. In order for this to work, we need to create attributes whose values are determined at the time they are read by a ZED.
How is this best done? If possible, I would like a solution that works via the protobuf interface, with minimal changes to ha-gateway or its configuration files (unless a more substantial change would make this kind of thing easier via the protobuf interface in the general case).
Thanks!