Track unknown devices

**Is your feature request related to a problem? Please describe.**
I would like to improve my guest detection capabilities and think it would be useful to have a list of trackers within range of my proxies to determine whether a guest is present. I currently only use my guest- wifi, however this is not very reliable.

**Describe the solution you'd like**
ESPresence has a feature that shows a list of generic nodes like garmin, ibeacon, itag, flora,apple, sonos per node with their distances. Having a similar ist of these seen fingerprints in bermuda could greatly improve my guest detection (for people with trackers) .

Or is this somehow already possible ?