This requires nmap to be installed:
This will auto create device.whatever tracking entities in HA, but it's good to know about "known_devices.yaml" (which is being deprecated) in case you want to customize things. I had my device show up two times, once via GPS and another via "Ping" which is what I wanted, so I had to rename one easily differentiate.
I believe states are "home/away".
I setup a lovelace card w/ both devices and entity state while setting up/debugging.