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Love to see convergence on an open portable RTL-SDR rig like the "tricorder" in the article.

I've also tried putting together the right hardware + software but found it a little overwhelming for my lack of expertise.

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Something like a HackRF with a Portapack?

https://www.youtube.com/watch?v=oEHfPPo1ZlU

Yeah, I think that's it. Maybe it just needs some more "intuitive" software?

I'd like to see this sort of hardware built into a smart phone as a matter of course, I think the Infosec specialists would find it extremely useful.

I doubt tunable hardware will ever be integrated into phones, given certification regulations,but there are apps for tuning RTL-SDR over USB OTG from Android.

I don't really know why an RPi was used in this example as opposed to a cheap used laptop that already has screen, battery and decent USB.

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