I'd be extremely interested if this could be used to build a rudimentary Wi-Fi spectrum analyser / interference scanner. It doesn't even have to be very good—ha

I'd be extremely interested if this could be used to build a rudimentary Wi-Fi spectrum analyser / interference scanner. It doesn't even have to be very good—hazy and vague measurements are a million times better than no measurements. The commercial option is Wi-Spy, a product that is so massively overpriced it's borderline absurd.