I don’t know of a way to integrate it via Bluetooth or WiFi, but if you purchase the new Z-Wave version, you can integrate it using the standard Z-Wave JS Home Assistant integration. You’ll still need a Z-Wave hub, or Z-Wave gateway device (I use a USB based controller plugged into the back of my Home Assistant machine) but the actual pairing and integration process is painless. Once integrated, I could lock and unlock from Home Assistant easily, get lock status, as well as get battery level information. Unfortunately, that’s about all you get with the Z-Wave interface today, but there is an excellent feature request suggesting a more robust Z-Wave feature set that should be directly applicable to Home Assistant. Ideally, I’d like to get door sensor status, as well as usage reports from the lock denoting who last used the lock (and when) and with what method of lock/unlock.
In a perfect world, I would really like to see an officially supported Home Assistant Integration as August Smart Locks have. I’ve tested August’s Smart Lock integration into Home assistant, and it’s interface is excellent. It provides everything I suggested above. However, I still purchased the Ultraloq U-Bolt Pro because I think the hardware quality is exponentially better than August, and I dislike that the August integration requires cloud access. In a perfect world, U-tec would have the same level of integration into Home Assistant as August, but using a local interface of some kind (Wi-Fi, Z-Wave or Zigbee.)
EDIT: After making this response, I figured I should probably just create an official feature request for a good home assistant integration. You can find it here if you’d like to support it.