I created this to get a little more info tracking from bluetooth devices that I wanted to monitor. this one collected and tracked info a little differently than others I tried.
Hope you find it useful 
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I get this message from HACS:
<Integration cmptrblder/ha-ble-observer> Repository structure for v0.3.1 is not compliant
when I try to add it as a custom repository
Same here!
Someone let me know and I fixed the structure, I apologize for the error.
I actually have a question for you guys or gals on this forum, is there a way to get a notification from this community forum if you folks have a question or issue? I get them from github, I’d like to get them from here too.
NM I found the notification settings… 
Looks like it installed fine now, but I’m not sure what the four numbers or the entries in the diagnostics file are supposed to tell me - especially with these fields for every one of my nine entries showing this:
"mac": null,
"vendor": null,
"manufacturer_id": null
"device_family": "unknown"
"mac_behavior": "rotating"
"primary_source": null
I also had to manually rename/prefix the entity names (with ble_observer_) for them to make any sense in the overall scheme of things.
Here are the current results in a set of entity cards:
This integration keeps track of everything thats bluetooth, alot of BT devices talk passively (once in awhile) and some actively (all the time). I had to create this tool to track the info from BT controlled lighting, temp / humidity sensors and FitBark sensors I have integrated into my home assistant.
I have a Pi with HA running on it with the BT adapter in active mode and all its used for is communicating with BT devices. That BT Pi then links to my main HA so I can control or capture the data. I have so many things in my house BT, my log is loaded. I’m thinking of updating this to possibly ID the items better, what do you think?
I’m now up to 12 devices in the diagnostics file (the Bluetooth - Advertisements tab shows more than 40 without my 10 proxies) but still none of them seems to be my Pixel phones that I use for in-home location via BLE (and which would probably show "mac_behavior": "rotating") or either of my SwitchBot temperature sensors (which should probably show a fixed MAC address).
It sounded interesting, but with all entries in the diagnostics file still showing the same non-info
"mac": null,
"vendor": null,
"manufacturer_id": null
"device_family": "unknown"
"mac_behavior": "rotating"
"primary_source": null
it doesn’t help me to identify anything.