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I would like to use an Arduio + wifi shield to grab unique mac addresses of any wifi chips within range, these will then be sent to my home server. Right now my chip creates an ad-hoc wifi network that devices can connect/communicate with.

Most chips are set to monitor for active networks nearby, is this enough communication to retrieve the mac address from them? Has anyone built something like this?

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You might try looking through the source for desktop linux or router-linux tools and see what they are doing with their scanning tools. I suspect a known-flashable router may be a cheaper hardware platform by the time you are done. – Chris Stratton Dec 28 '11 at 16:17
@ChrisStratton I agree that might be the best way to go. I've been able to build this functionality on linux with kismet. I actually think the new RaspberryPi will be the cheapest/easiest way to do this. – fancy Dec 28 '11 at 17:34

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