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posted by Fnord666 on Tuesday October 29, @07:02AM   Printer-friendly

https://github.com/RamboRogers/rfhunter

This project is an RF Signal Scanner built using an ESP32, AD8317 RF detector, and various other components. It's designed to detect and measure RF signals in the environment and display the signal strength on an OLED display. It's useful to find hidden cameras, wiretapping devices, and other RF-enabled devices.


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  • (Score: 2) by SomeGuy on Tuesday October 29, @11:28PM (2 children)

    by SomeGuy (5632) on Tuesday October 29, @11:28PM (#1379357)

    I'd really like to read more on the practical uses of this and how it responds to other RF-emitting devices.

    On youtube, there is a video of a low frequency RF device (requires a dumb smart phone, of course) that is supposed to find pipes in walls, but can be used, in a limited way, to sort of see other things through walls. Enough to see vague shapes and movement. Would this detect that sort of thing?

    On the main page, it talks about finding hidden cameras, but as far as I know that only works if they are dumb enough to put a wireless transmitter right on the device. What about a USB/ethernet camera or wired microphone? Won't do squat will it? Nobody ever talks about that.

    Does this thing detect RF put off by LED lightbulbs and other noisy modern electronics? Although, would a TRS-80 through the entire thing off?

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  • (Score: 2) by namefags_are_jerks on Wednesday October 30, @02:26AM

    by namefags_are_jerks (17638) on Wednesday October 30, @02:26AM (#1379374)

    RF Signal detectors are over a century old. That ESP32 would have like 400 million transistors (as a guess); you only need one.

    The old-tech Detector diode way would also pick up other RFI, which would be answer your question -- the ~150 kHz RFI from DC power convertors, the 10(*N) MHz harmonics from wired ethernet, and the other birdies from electronic devices. Like you said, a smart creep would cloak the recorder's RFI with another nearby RFI source.

    The old 'FM Radio Bugs' kits that're entirely analogue and whose emissions are within the FM band would be quieter.. (although there are of course methods for detecting those)

  • (Score: 2) by owl on Wednesday October 30, @10:11AM

    by owl (15206) on Wednesday October 30, @10:11AM (#1379414)

    What about a USB/ethernet camera or wired microphone?

    Wired USB/ethernet will give off some RF -- whether this device (or whatever other device one may have) is both sensitive enough at the correct frequencies, and can pickup the USB/ethernet RF out of the noise floor, is a different story.

    A wired mic will also give off RF, but RF at audio frequencies will be very tricky to "detect".

    And, this of course assumes that the "hidden camera installer" is smart enough to not just do the easy stupid method of "wifi hidden camera" as you say. For most "peeping tom" types, they likely have no idea how easy it is to detect their "wifi hidden camera". It works simply because only 1 in 1000 know to bother to look.