Information gathering using Bluetooth or Wifi APN

I am trying to print all the available information about a mobile device using an Open APN for wifi or bluetooth. But I am unable to see where to begin.

We get notifications about the open wifi or available Bluetooths around our device automatically, so is there a way we could decode the request/auth packets from the device and get some information about the device requesting connection?

What information about a device can be accessed using just an open wifi/Bluetooth APN?