Broadband-Hamnet announced yesterday the release of BBHN-1.1.0, which adds official support for some Ubiquiti 5.8GHz devices, and back-to-back links (e.g. setting up a 5.8GHz mesh backbone with 2.4GHz last-mile links to individual endpoints)
Check out the release notes for full details, but the new firmware does change the SSID yet again, which means upgrading a device will separate it from an existing mesh with older HSMM-MESH or BroadbandHamnet-v1 SSIDs.
Currently, all known KM3SH affiliated nodes are running BBHN-1.0.0 or a compatible build. We are still designing the deployment details, and will likely ask everyone to upgrade to 1.1.0 once we’ve tested it.