You just need something that receives 2.4GHz and can give you signal strength (or calculate an FFT). Spectools [1] is a great tool for this, it already support

You just need something that receives 2.4GHz and can give you signal strength (or calculate an FFT). Spectools [1] is a great tool for this, it already supports Ubertooth and could easily be adapted to work with HackRF. Caveat: I work on Ubertooth for Michael Ossmann [1] https://kismetwireless.net/spectools/ https://kismetwireless.net/spectools/