iotzigbee

What clusters & commands are required by the ZCL/Zigbee specification?

I've been trying to understand the Zigbee specification. I know there are many types of "clusters" of commands (see the full Zigbee Cluster Library specification), but I'm not certain which (if any) are mandatory.

What commands are all Zigbee devices required to support? For example, are all devices required to support the "group" cluster?

EDIT: I also note that Matter defines device types in the Matter Device Library, which explicitly delineate which clusters are required for different types of devices. For example, a dimmable light must support groups, on/off, and level control, among other things. Does such a thing exist for Zigbee?

Solution

  • Yes, there seem to be mandatory clusters for all Zigbee-certified devices (at least 3.0).

    For Zigbee 3.0 certification, devices must implement the Base Device Behavior specification & at least one "application device specification" (p. 22):

    The Product implementation SHALL conform to these Standard specifications as appropriate to the declared PICS:

    • [...]
    • Base Device Behavior specification
    • [...]
    • One or more application device specifications

    There are a few application device specifications. A notable one is the ZigBee Lighting & Occupancy Device Specification, which describes several device types, like "On/off light", "Dimmable light", and "Color dimmable light", etc.

    Each of these device types has a set of required & optional clusters.

    Officially certified devices should have this tested

    This is supposed to be tested for Zigbee certification (p. 6):

    zigbee certified products have had their underlying platforms, Base Device Behavior and application level objects (from the ZCL) tested and validated to conform to the requirements of the various standard documents. Products carrying the zigbee certified product mark carry with them the confidence that all required behaviors (along with any implemented optional behavior) have been properly vetted and thus can interoperate with other products carrying the same mark.

    Example: on/off lights

    For example, for On/Off lights (device ID 0x0100 & the standard profile Zigbee Home Automation profile ID, 0x0104):

    Required clusters for on/off lights

    See also