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Show HN: RF Hunter – Find hidden cameras and other devices
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.
- swayvil 2y agoA thing for talking to rfids might do this. Some phones have an rfid thing. If it could sweep a frequency range.
- deleted 2y ago[deleted]
- Terr_ 2y agoIs the ESP32 mainly to drive the LCD display and provide a numeric readout, or is it also needed to control the sensor-side so that it cycles through different settings and frequencies?
- RamboRogers 2y agoIt runs the screen and reads the sensors, you can see it in the code.
- transpute 2y agoThanks for making this public. What's the ballpark BOM cost? Could a directional antenna help with locating RF sources? There's some older work ("WokFi") on parabolic antennas for WiFi, https://web.archive.org/web/20140802123553/http://www.usbwifi.orconhosting.net.nz/ https://web.archive.org/web/20140802123553/http://www.usbwif... Here's another circuit design for AD8317, https://g8rwg.uk/articles/noise-meter-ad8317/ https://g8rwg.uk/articles/noise-meter-ad8317/ > The AD8317 module I’m using has the logarithmic slope set to 22mV/dB. I used the output of a Viavi JD785 at different frequencies to check the slope and dynamic range of the device. Linearity and dynamic range at 1GHz and 3.5GHz is good and as expected drops off at 144MHz and 6GHz.
- pragmatick 2y ago> What's the ballpark BOM cost? https://github.com/RamboRogers/rfhunter/blob/master/rfhunter.cpp https://github.com/RamboRogers/rfhunter/blob/master/rfhunter... contains amazon links. About $100 although many of the required components come as packs.
- bobmcnamara 2y agoGenerally, directionality is tricky to do handheld over a wide bandwidth. Another approach is a phased rx array, could even be as few as 2 antennas, and from that you get a bearing too.
- amatecha 2y agoMay I introduce you to: the Log-periodic dipole array antenna[0], allowing quite a broad response range with decent directionality in a single antenna. There's probably a practical limit to just how broadband you can make one, but just from a quick search I found one commercially-available antenna[1] that covers 120mhz-2.5ghz, for example. [0] https://en.wikipedia.org/wiki/Log-periodic_antenna https://en.wikipedia.org/wiki/Log-periodic_antenna [1] https://ara-inc.com/product/lpd-tactical/ https://ara-inc.com/product/lpd-tactical/
- bobmcnamara 2y agoDidn't read it, but it's going to be poor directivity for that meager bandwidth. If you're going to go with that wide of a beam why not use a single element and wave it around? I should also mention the third trade off, size, plays into this tool.
- kubectl_h 2y agoWhat is the sensitivity/range? I've always wanted something like this to carry in the woods to detect game/trail cameras. Not for any nefarious purpose, but to get an idea of how surveilled the woods are.
- etrautmann 2y agoDon’t many of those just store data locally?
- Loggias 2y ago[dead]
- kubectl_h 2y agoOh duh, yeah you are right. I had swapped RF and IR in my head for some reason when I was scanning the project page and thought this was somehow picking up signals based off noise from the sensor. Might be time for bed for me.
- ffujdefvjg 2y agoGame cams with cellular modems are getting to be pretty common, and you can equip them with solar panels. Basically just set em and forget em. It wouldn't surprise me if this is making them much more common...you can get them deep into the woods and don't have to go check on them hardly at all. https://www.forestry-suppliers.com/c/trail-game-cameras/3-30-932?page=1 https://www.forestry-suppliers.com/c/trail-game-cameras/3-30...
- A4ET8a8uTh0 2y agoSigh, it used to be at least woods offered respite from ever-present cameras. I am starting to think I should stop trying to fight the impending 'Transmetropolitan' future.
- jamil7 2y agoGame cameras are truly pathetic.
- o1o1o1 2y agoInteresting, thank you for sharing! Maybe somebody knows: Is there something similar for the Flipper Zero?
- RamboRogers 2y agoI could make it I suppose.
- x______________ 2y agoI've been lurking yc for a while and you inspired me to reach out to the community.. This would be pretty awesome, please advise if there's anything I (or anyone) could do to support you in getting this logic onto a flipper (project support, testing, etc). -x
- RamboRogers 2y agoOkay, I don't think it would be hard, most of the Flipper Modules use some sort of ESP module like an ESP8266 for the Wifi module. I've got a flipper right here. I find it cumbersome to use, but it's a pretty popular consumer product. I'll look at what the wiring cost could be to print a board. I've never done that.
- o1o1o1 2y agoFirst of all, I also would be very grateful if you can make this happen. I don't have too much free time currently and also no skill in hardware, but if there is anything else I can help with, I'd be happy! Why do you find it cumbersome to use?
- ghostpepper 2y agoThis is cool. Is is all point-to-point wired inside? I can't imagine a PCB design would be too difficult if all the RF stuff is handled by the IC.
- RamboRogers 2y agoyeah, it's just soldered up to the pins. More details here: https://blog.matthewrogers.org/b/8BCF175A-6CC6-4E61-8310-A91034389015/Find-Hidden-Devices---RFHunter---Det https://blog.matthewrogers.org/b/8BCF175A-6CC6-4E61-8310-A91...
- ffujdefvjg 2y agoCool project! I'd buy one of these if they were pre-assembled.
- RamboRogers 2y agoThanks, it costs about 30$ in parts. Not sure what a fair price would be.
- ffujdefvjg 2y agoNot sure what the time/labor looks like, but I'd easily pay $60 bucks for that. You may be able to sell them at $100 and still move quite a few. Honestly if you dressed it up a little you could probably charge quite a bit, it's just a matter of reaching that audience.
- _dark_matter_ 2y agoAgreed, I'd buy this at $100 for sure. I stay at a lot of airbnbs and am the kind of person who regularly checks those places for bedbugs.
- woleium 2y agoi just disconnect the provided router in airbnbs i stay at. Turns out the host usually drops round all worried if there is a hidden camera.
- deleted 2y ago[deleted]
- RamboRogers 2y agoThis is a great idea.
- b112 2y agoIt's sad we're letting bedbugs return.
- declan_roberts 2y agoA way easier solution to this is to turn off all of the lights and look around with your phone camera. The phone camera will pick up the bright IR lights that hidden cameras use to illuminate the room-- wireless or not. Obviously this only works if the camera uses IR lights, but pretty much all of the sneaky ones do.
- RamboRogers 2y agoWell, maybe - it would need to have ir enabled. This also detects listening devices etc.
- mbreese 2y agoWould this also be able to detect something like a camera that saves videos to an SD card to be retrieved later? Something that doesn't use WiFi or a radio? That's the main limit I see, but I'm wasn't sure if it such a device would still generate enough RF intrinsically w/o a radio.
- ddingus 2y agoMaybe those could be found with a parabolic antenna and possibly an amp, ideally one with a limited range one can control via software. Once a few common signals are known, the software could do programmed patterns to ferret out easy ones.
- Ballas 2y agoMost phone cameras have pretty steep IR cut filters these days. The front camera on most phones still don't, so you have to use that. That said, most of these spy cameras don't have IR illuminators...
- deknos 2y agodo you have examples of cameras or smartphone which do not have IR filters?
- jmward01 2y agoIn Japan there was a requirement to make a noise when taking a picture on a phone. I'm not a huge fan of that since there are a lot of reasonable reasons to not want noise, but I would be a fan if any capture device was require to advertise its presence wirelessly to make it easy for any smart device to notice an active recording device nearby. That wouldn't stop sophisticated surveillance but it would act like a cheap lock and stop a lot of the abusive stuff, or at least let people more quickly notice it.
- RamboRogers 2y agoThis Device lights up pretty good on wireless or cellular data transfer. If my wife starts browsing on her phone it lights up.
- rahimnathwani 2y ago> but I would be a fan if any capture device was require to advertise its presence wirelessly to make it easy for any smart device to notice an active recording device nearby That would be convenient for burglars or dishonest cops.
- sriram_malhar 2y agoDang. Never thought of that. No free lunch, eh?
- Cthulhu_ 2y agoA burglar isn't deterred by a camera though. I mean for this use case they'd already be inside. Cameras don't prevent nor solve crime, at best they're for legal purposes if someone is caught, or for insurance claims.
- kube-system 2y agoThat sentiment has selection bias built in. Anyone who commits any crime wasn't deterred by everything. It is, however, factual that people choose to behave differently when they know they are being recorded. That might mean choosing not to commit a crime, commit it elsewhere, destroying a camera, or wearing a mask. While a functional camera can't prevent crime, it can identify those who commit them.
- rkagerer 2y ago"If you don't have a 9V battery, you can use a 9V battery."
- RamboRogers 2y agolol, some bad summary there. It uses a lipo 3.7
- RamboRogers 2y agoI fixed it, thanks for the comment :-)
- aaron695 2y ago[dead]
- ujikoluk 2y agoI have long dreamt about building a portable phased array for this purpose, but additionally using the phase difference between receivers to visualize where the transmission source is. In effect a camera into the RF world!
- transpute 2y agoCould be combined with AR, https://hackaday.com/2019/01/09/smartphone-app-uses-ar-to-visualize-the-rf-spectrum/ https://hackaday.com/2019/01/09/smartphone-app-uses-ar-to-vi... DIY radio telescope tuned to 2.4Ghz WiFi, https://www.youtube.com/watch?v=g3LT_b6K0Mc https://www.youtube.com/watch?v=g3LT_b6K0Mc Image of physical building overlaid with RF sources, https://www.facebook.com/thethoughtemporium/posts/2162600763976308 https://www.facebook.com/thethoughtemporium/posts/2162600763... > When I made the first video and photoshoped my impression of what I thought this would look like, I never imagined it would actually be this close. It's official, our telescope can map the wifi in a building as if it were any other form of light.
- ujikoluk 2y agoOh neat! Yes that's the kind of imagine I want to see
- coin 2y agoTitle is misleading. It only detects RF. A hidden camera could record to storage for later upload in which case wouldn’t be transmitting continuously.
- KeplerBoy 2y agoDepends on the sensitivity of the device. It might be possible to pickup the EMF of the camera, even if it's not actively broadcasting. Every current carrying trace is an antenna.
- satori99 2y agoWhat you really need is a Non-Linear Junction Detector. These can detect an unshielded device with transistors, even if it's off. https://en.wikipedia.org/wiki/Nonlinear_junction_detector https://en.wikipedia.org/wiki/Nonlinear_junction_detector
- killingtime74 2y agoThat would only be practically useful in an environment devoid of all other electronics. How would one tell between the non-transmitting spy cam and normal household electronics
- KeplerBoy 2y agoBy having some spatial/angular resolution. You'd need a large directional antenna or multiple antennas to have something similar to a phased array radar, but passively (i.e. listening only).
- RamboRogers 2y agoIt doesn’t say “all”, it also doesn’t detect a someone in the closet, unless they’re transmitting.
- consumerx 2y agoit seems multiple ESP32s would fit into this giant case.
- RamboRogers 2y agoYou could without boost converter and the battery. https://x.com/rogerscissp/status/1847430193113141549/photo/1 https://x.com/rogerscissp/status/1847430193113141549/photo/1
- yftsui 2y agoThe most effective way would be use a Thermal Camera, because a normal "hidden camera" you get from eBay will consume around 5 Watts - a significant heat dissipation. For others, probably just get an off the shelf TinySA?
- transpute 2y ago> TinySA What's the frequency range and scanning speed of TinySA?
- garblegarble 2y agoAnother way to detect hidden cameras is optical augmentation, using reflections to locate lenses; this can detect cameras that aren't currently on / actively transmitting. Some paper and product references: - (PDF) http://s3.amazonaws.com/arena-attachments/1381379/c3a4e751324dc288e976bd33d0295ea3.pdf http://s3.amazonaws.com/arena-attachments/1381379/c3a4e75132... - https://www.spycatcheronline.co.uk/product/camera-detector/ https://www.spycatcheronline.co.uk/product/camera-detector/ - https://www.ijser.org/paper/Lens-Detection-System-using-Optical-Augmentation.html https://www.ijser.org/paper/Lens-Detection-System-using-Opti... - https://patents.google.com/patent/US20090237668A1/en https://patents.google.com/patent/US20090237668A1/en
- Cthulhu_ 2y agoThat camera detector is pretty pricey; I once saw a low-tech solution that was basically a dyed card that you had to put in front of your phone camera with the light on, the light reflected by the camera lens would become very visible. Of course, only a matter of time - if they don't already exist - before there's cheap spy cameras without a reflecting lens, like a solid state camera of sorts. I believe some years ago they were experimenting with that as an alternative to a front facing camera on phones.
- rapjr9 2y agoLook for "bug detector" on eBay, there are lots of RF and optical camera detectors and they are fairly cheap. They work, at least so far as detecting steady streams of WiFi data, and cellphone transmissions, I've tried a couple of them: https://www.ebay.com/sch/i.html?_from=R40&_trksid=p4432023.m570.l1313&_nkw=bug+detector&_sacat=0 https://www.ebay.com/sch/i.html?_from=R40&_trksid=p4432023.m... The optical camera detectors work based on a simple idea, red LED's are used to create a circular pattern of light and you look through a red filter at your space. A camera lens is concave and symmetric so it reflects the LED's in the same circular pattern. Blink the LED's. Look through the red filter and scan around the room. Anything that reflects a discernable circular blinking LED pattern is a lens or lens like. Basically it makes it easy to see everything that reflects light symmetrically back at you. Move around a little and anything with a lens will stand out. It only works with fairly large lenses though, a pinhole camera would not be detectable. Their RF detectors have adjustable sensitivity and indicate amplitude of the signal. Good enough to track the transmissions back to the source, though they don't provide any frequency information. Range is somewhat limited so you have to move around a room to scan it. TinySA works well for detecting RF sources also. I don't know what the exact update rate is but the one I have seems to update at least a few times per second. It's a little tedious to use, the RF spectrum is big and you'll find quite a few spikes from sources in it and you have to zoom in on each one to get the exact frequency and observe how it behaves (or maybe there is a way to select a peak of interest? I haven't played with it much.) You'll find FM radio stations, cellular communications, cordless phones, and lots more. Most people are not going to be finding surveillance bugs in their homes or offices. However these things are useful for understanding what your RF environment is like or troubleshooting RF devices. Might be good for telling if your smart appliance is spying on you, for example if the detector beeps every time you change channels on your TV.
- slow_typist 2y agoOP, cool project. I have questions though: How does the device detect very short bursts? After looking up the data sheet of the RF detector I believe you would need additional circuitry to not risk that very short bursts slip through the sampling of the ESP A/D input. Second, the supply voltage of the detector seems to be 3.0 V to 5.5 V, https://www.analog.com/en/products/ad8317.html https://www.analog.com/en/products/ad8317.html
- RamboRogers 2y agoIt doesn't detect short burst well at all. It does detect traffic over a second or so, like a TCP session of an h264 stream. https://www.amazon.com/dp/B07FHZXTCZ?ref=ppx_yo2ov_dt_b_fed_asin_title https://www.amazon.com/dp/B07FHZXTCZ?ref=ppx_yo2ov_dt_b_fed_... Specifications: Working frequency: 1M--10000MHz Measurement power: -55dBm to -0dbm Output voltage: 0.33- -1.65V Detection slope: -22mv/dBm (typical value) Input impedance: 50Ω Supply voltage: 7-15V Size: as the picture Weight:7g
- 9dev 2y agoWhile researching for parts, I also found this one: https://www.amazon.com/dp/B07RR86PFC/ https://www.amazon.com/dp/B07RR86PFC/ It goes up to 10GHz, and it operates on 5V. Would that also be an option, and possibly allow to get rid of the boost converter too?
- RamboRogers 2y agoLooks cool! make one :-)
- slow_typist 2y agoThanks OP. The detector itself has a Pulse response time of 6 ns/10 ns (fall/rise) but of course the whole system will always be slower. 1 s is a lot though, got probably nothing to do with the sampling done by the esp.
- transpute 2y ago2018, "Low budget consumer hardware espionage implant", 220 comments, https://news.ycombinator.com/item?id=40363704 https://news.ycombinator.com/item?id=40363704 & https://news.ycombinator.com/item?id=20190251 https://news.ycombinator.com/item?id=20190251 & https://news.ycombinator.com/item?id=15676737 https://news.ycombinator.com/item?id=15676737 2019, "Airbnb Has a Hidden-Camera Problem", 50 comments, https://news.ycombinator.com/item?id=24324300 https://news.ycombinator.com/item?id=24324300 2019, "How to find hidden cameras in your AirBnB", 300 comments, https://news.ycombinator.com/item?id=20457419 https://news.ycombinator.com/item?id=20457419 2023 repro of "Great Seal Bug" (1952): mechanical microphone, no power source, data exfiltrated via external directed microwave beam, https://www.youtube.com/watch?v=NLDpWrwijE8 https://www.youtube.com/watch?v=NLDpWrwijE8 Try measuring the RF emissions of: USB hubs AC power strips SSD enclosures monitors
- deleted 2y ago[deleted]
- goodpoint 2y agoThis is ineffective against most recording devices.
- RamboRogers 2y agoOnly if it’s transmitting, this detects rf. It can’t detect ears.
- goodpoint 2y ago...and only if the transmission is frequent enough.
- RamboRogers 2y ago100%, it needs to transmit pretty much constantly. Something like an H264 stream or an audio stream via TCP or UDP over something like wifi.
- amelius 2y agoDoes it get confused by nearby WiFi transmitters?
- RamboRogers 2y agoIt baselines on power on. So you'll need to get closer to raise the baseline. It also doesn't seem to alert on beaconing (or very little), my wifes phone and other devices need an active transfer to trigger it. (more than a 1/2 second)
- amelius 2y agoMight also be useful for initial EMC compliance testing, maybe.
- beardyw 2y agoThose 128x64 displays are easy to use, but frustratingly variable. They have differing start up sequences which using the wrong one leaves a blank screen.
- danbruc 2y agoFun fact, you can actually detect semiconductor devices even if they are powered off and hence emit no radiation unless the design took specific precautions. This works by illuminating a region with high frequency electromagnetic radiation and then listening for the effects that PN junctions have on the reflected radiation due to their nonlinearity. [1] [1] https://en.wikipedia.org/wiki/Nonlinear_junction_detector https://en.wikipedia.org/wiki/Nonlinear_junction_detector
- amelius 2y ago> Thousands of diodes were mixed by the Soviets into the building's structural concrete, making detection and removal of the true listening devices by its American occupants nearly impossible. Wow ...
- mxuribe 2y agoThat's called playing the long game, and playing it quite cleverly!
- daveguy 2y agoNot really. It makes it clear from the first attempted sweep they altered construction -- the opposite of a long game.
- krisoft 2y agoThat depends on what the game is. For example if they wanted the embassy to stay in their old already compromised premises they achieved that. (for about twenty years at least.) If they wanted the USA to spend a lot of money they also achieved that.
- emmelaich 2y agoThey knew about the devices in 1985, a few years after construction started in 1979 and construction didn't finish till 2000. They probably knew earlier than 1985. So it probably wasn't a big deal and would've cost the SU a lot and they were less able to afford it.
- thih9 2y agoDoes anyone have a personal experience with finding a hidden camera in an AirBnB?
- lynx23 2y agoWell, not in an AirBnB, but... Already years ago, they found one in the ladies room at work...
- RamboRogers 2y agoI found someone with a pen recording me. They left it on the desk, and I took it by mistake. I found it in my kit and realized it was a spy device.... yikes.
- binarymax 2y agoYes, but it was obvious and I didn’t use equipment. It was in Jan 2020 at an Airbnb “hotel” in Nashville. There were two smoke detectors in the room. One of them was not like the other. I wrapped it in toilet paper. I left it wrapped so the owners knew that I knew, but I didn’t bother reporting it because I rarely used Airbnb and it was a last minute trip. And then the pandemic hit and that was that.
- JKCalhoun 2y ago> There were two smoke detectors in the room. One of them was not like the other. I imagine too that the other was not like the one. ;-)
- marsh_mellow 2y agoVery cool! Could this work for detecting nearby drones?
- RamboRogers 2y agoI would think it would work really well for that usage case. You could tune the antenna to focus on the in use bands. The automatic baselining solves a lot of this.
- sandworm101 2y ago>> It's useful to find hidden cameras, wiretapping devices, and other RF-enabled devices. Nope. It is used to find RF-emitting devices, the sort of low-sophistication stuff you can buy online for real-time continuing surveillance. For many decades, the real spy stuff has operated in burst mode: collecting data quietly and only transmitting it at an agreed time or in response to an external signal. To detect them you need to be monitoring 24/7 with a rig capable of triangulating signals that might only last a second or two.
- RamboRogers 2y agoThis finds a Wyze camera or many of Wifi Cameras as demonstrated in my video. So yes, with proof attached. Thanks
- 01100011 2y agoWhat I really want is something that detects any EMF above 60Hz. When I was a kid I used to hook a coil of wire and a diode to a piezo earphone. I then listened to the emissions of various devices in my house. My Amiga 500 was particularly interesting. I ran across a few projects that do the same thing but add an opamp and recording so you can generate sounds for electronic music.
- anthomtb 2y ago> any EMF above 60Hz. Isn't that effectively all the EMF? You may be missing a prefix. Edit: huh, turns out these frequencies do have some applications: https://en.wikipedia.org/wiki/Super_low_frequency https://en.wikipedia.org/wiki/Super_low_frequency
- 01100011 2y agoAnything above 0Hz radiates. EMF is short for 'electromagnetic field' which even DC produces, so I guess I could have worded it better. In any case, I would want to detect the emissions from the CPU, memory bus and SD card traffic. Not all cameras are WiFi. Sure, that won't detect passive listening devices or other advanced techniques, but most people now are worried about video and that will have certain characteristic emissions. Edit: Something like CamRadar, presented here: https://dl.acm.org/doi/10.1145/3569505 https://dl.acm.org/doi/10.1145/3569505
- banku_brougham 2y agoCan you give more detail so I can do this with my kid? I'm a not a hardware person but handy enough I think. How would I connect the diode to the coil? By coil do you just mean wound-up wire or is this an electronics component?
- sardines 2y agoI haven't made one (much less with a kid) but I think the term to search for is "foxhole radio" or "crystal radio". Good luck!
- 2y ago
- bloopernova 2y agoThis is really cool! Have you considered using a Software Defined Radio or would that not improve capabilities enough to be worth the hassle?
- RamboRogers 2y agoI have an SDR as well and I just got a TinySA, neither really do this.
- sriram_malhar 2y agoThanks for this useful project. Can I trouble you to add a circuit diagram of the latest rev? So much easier than reading text.
- omagramma 2y agoThis doesn't do anything useful. To detect RF transmissions you need to sweep a range of frequencies stopping at each frequency for a period of time for the Rx amp to sample. The AnalogDevices detector that is uses needs to be programmed, and the arduino code doesn't do that. It doesn't have the bandwidth or performance to do any real scanning. There's a reason why spectrum analyzers cost thousands (or tens of thousands) of dollars. Its funny watch Arduino (ease) programmers try to figure out RF (very hard).
- RamboRogers 2y agoYou know, when my wife opens up a webrowser on her phone and it starts transmitting this device triggers. When I go next to a wifi camera and it picks up the RF, it triggers. Demonstrably it does detect signals. You clearly don't understand the basics (very easy).
- CamperBob2 2y agoParent post falls firmly into the "Not even wrong" category, after you get past the "Just plain wrong" parts (such as the need to program the AD8317.)
- jdthedisciple 2y agolooks good, now I just need a version of the same software that runs on my phone so I don't need to buy all these materials and slap them together
- RamboRogers 2y agoYES! our phones should do more.
- ajsnigrutin 2y agoFollowing the amazon links in the cpp brought me to this: https://www.amazon.com/gp/product/B07FHZXTCZ https://www.amazon.com/gp/product/B07FHZXTCZ Holy fsck, the build quality must be shitty if even the amazon photo looks horrible (just look at the area around the voltage regulator)
- roydivision 2y agoI'm confused, what RF does a camera typically emit, and why?
- rapjr9 2y agoUsually WiFi, so it doesn't need a cable to transmit the video/audio. The video processing electronics in cameras probably also emit some RF but that would be at a variety of much lower frequencies and only detectable with something like a loop of wire and an oscilloscope over very short distances, like this: https://www.meilhaus.de/en/infos/beehive.htm https://www.meilhaus.de/en/infos/beehive.htm
- roydivision 2y agoThanks, that makes sense. So all this implies the camera is transmitting information elsewhere and not storing it locally.
- alexrenund 2y ago[dead]
- taeefnajib 2y agoThat's fascinating! Did you check the accuracy?
- RamboRogers 2y agoJust tested texting/browsing web etc. it needs a solid signal for a second or so.
- kshahkshah 2y agoI lost a keyfob a long while ago. I wonder if this could help me find it?
- rightbyte 2y agoReally interesting. Could you please make a video showing well it works for different sources?
- RamboRogers 2y agoThis has a video showing the AP https://blog.matthewrogers.org/b/8BCF175A-6CC6-4E61-8310-A91034389015/Find-Hidden-Devices---RFHunter---Det https://blog.matthewrogers.org/b/8BCF175A-6CC6-4E61-8310-A91... I've made a few of these now, and they work on cell phones/laptops and cameras.
- rightbyte 2y agoNice thank you.
- alexrenund 2y ago[dead]
- alexrenund 2y ago[dead]