Please consider adding Zeroconf DNS TXT Reconds parameters in firmware for automatic ZHA network discovery but only enable it when running in "Zigbee Home Automation Mode".
Home Assistant OS (formerly HASSIO) support automatic network scanning and “Service Discovery” via Zeroconf and when a whitelisted Zigbee serial gateway is discovered it can pass along that to a domain like the ZHA integration component in Home Assistant.
For more context about this Zigbee gateway “Service Discovery” via Zeroconf for the ZHA integration in Home Assistant, please see:
Once support for Zeroconf has been added to the firmware you also need the firmware to provide DNS TXT records for passing along setting parameters to integration config flows.
You first need to add Zeroconf service and give it name and as well as adding information about protocol (tcp) and port (????), etc.
Then DNS TXT records is used to pass along recommended settings parameters config flow to Home Assistant's ZHA integration:
Please consider adding Zeroconf DNS TXT Reconds parameters in firmware for automatic ZHA network discovery but only enable it when running in "Zigbee Home Automation Mode".
Home Assistant OS (formerly HASSIO) support automatic network scanning and “Service Discovery” via Zeroconf and when a whitelisted Zigbee serial gateway is discovered it can pass along that to a domain like the ZHA integration component in Home Assistant.
For more context about this Zigbee gateway “Service Discovery” via Zeroconf for the ZHA integration in Home Assistant, please see:
https://community.home-assistant.io/t/zha-automatic-discovery-of-zigbee-coordinator-bridges-gateways-ethernet-wifi-network-devices-that-support-zeroconf-or-ssdp/293300
and
https://developers.home-assistant.io/docs/creating_integration_manifest/#zeroconf
FYI, there is already a working proof-of-concept this is now supported by Tube's Zigbee gateways (based on ESPHome firmware):
https://www.home-assistant.io/integrations/zha#discovery-via-usb-or-zeroconf
https://github.com/tube0013/tube_gateways
Once support for Zeroconf has been added to the firmware you also need the firmware to provide DNS TXT records for passing along setting parameters to integration config flows.
You first need to add Zeroconf service and give it name and as well as adding information about protocol (tcp) and port (????), etc.
Then DNS TXT records is used to pass along recommended settings parameters config flow to Home Assistant's ZHA integration:
I believe that is advertised for Zeroconf config in this format or similar (though is obviously for emberznet "ezsp" instead of zstack "znp"):
(use e.g. avahi-browse -r -a to see this)
As can see, you will need one DNS TXT Record for each attribute and value that is to be passed along to HA's ZHA integration.
Zeroconf DNS TXT records could also be used to pass along info about hostname, versions, location, MAC address, and more, etc..
http://www.zeroconf.org/Rendezvous/txtrecords.html
https://en.wikipedia.org/wiki/Zero-configuration_networking#DNS-based_service_discovery
https://en.wikipedia.org/wiki/TXT_record
More information about idea of using DNS TXT records for passing along setting parameters in https://github.com/thegroove/esphome-zbbridge#1 and https://github.com/thegroove/esphome-zha-ezsp-zeroconf
In the end it is probably best to see actual example config for ESPHome as in Tube's Zigbee Gateway as that is the reference:
https://github.com/tube0013/tube_gateways/blob/main/V2_tube_zb_gw_cc2752p2/ESPHome/tube_zb_gw_cc2652p2v2.yml
Again, support for Tube's Zigbee Gateway was initially added to Home Aassistant core for ZHA support in https://github.com/home-assistant/core/pull/48420
As I believe to then whitelist Zeroconf for more gateways and/or radio types in HA's zeroconf as well as for ZHA need to do PR for:
https://github.com/home-assistant/core/blob/dev/homeassistant/generated/zeroconf.py
and
https://github.com/home-assistant/core/blob/dev/homeassistant/components/zha/manifest.json
and
https://github.com/home-assistant/core/blob/dev/homeassistant/components/zha/config_flow.py