Theoretically possible?
No doubt, if you want to write a custom firmware for the zigbee chip and corresponding esp32 (or equivalent) firmware to push the data over ethernet. My guess is SI Labs ncp fw and multipan zigbeed would be a pretty good starting point.
But, no one has done so yet.
I see, that’s exactly what I meant.
That’s something beyond my ability yet, I don’t know much about zigbee firmware, too bad, and surprising, that nobody with the right skills found this useful… Thank you for the hints.
I was able to use ZB-GW03-V1.3 (the Aliexpress Tasmota hub) with Zigbee2MQTT. The key was to use the ezsp adapter in Zigbee2MQTT serial configuration:
port: tcp://hub_ip:8888
adapter: ezsp
Also you need to disable or delete ZHA integration before using Zigbee2MQTT. I did not change the firmware from the original firmware shipped by Aliexpress (Tasmota version). I did not configure MQTT on the hub itself, only the TCP Rx/Tx.
So you have a coordinator or repeater that communicates back to ha over the lan the ha sits on ?
Yes, exactly. The connection between HASS and the Zigbee coordinator is on network level (ethernet in my case).