I'm looking for hints to solve my problem. I would like to trace all devices that are in my surroundings. I know how do it when someone already access to my WiFi network, but I'm also interested to see all other devices. My idea is to trace mac address of all devices (associated and not associated to my AP). I assume that mac address is broadcasted by any device with WiFi network card independently of connection to the WiFi network and is primal for network card. I also assume that I can buy AP that can "see" it and finally log to the file.
Thanks for any hints.