Detecting MAC address of devices not connected to wireless network but in the area.

I am trying to get the MAC address of a device that is not connected to my WIFI in a certain area.

!. I would like to count these devices
2. I would like to see how long they are in the area.
3. I would like to keep in database for number of visits.

Has anyone ever done this before or have any ideas on how to accomplish this?

Thanks for any help in advance.

Dr. Tim

If you can’t see the device on network level you have a real issue. There are several entries on this on stackoverflow. I suggest you google a bit there. In general non wifi / fixed devices are to be found on your router. Not easy to get that data, but if you have a web interface you could do it using curl and parse the html page(s).