Add user defined cluster to a Zigbee endpoint?

[occam49]

Is it possible to add a user-defined cluster to an endpoint?
I'm new at trying to develop a Zigbee endpoint sensor

I'm developing a temperature sensor Zigbee project based on the ESP32-C6 using the ESPRESSIF Arduino library and examples. I'd like to add text or numeric value to the reported data to help with debugging. Is it possible to add an additional "debug" cluster to an endpoint? Or, use the existing cluster_revision cluster for that purpose?

I'm Integrating with Home Assistant using ZHA. On the XHA device page I see the following clusters

Zigbee temp sensor clusters.jpg (352.23 KiB) Viewed 1179 times

[lbernstone]

The attributes are pre-defined, but you can make your own composite device with a number of cluster types.
Check out the documentation