4 ms·
SDR and RF in general has always felt like black magic for me, but the availability of cheap hardware and wife software selection makes this accessible to every
by trishmapow2 9y ago
SDR and RF in general has always felt like black magic for me, but the availability of cheap hardware and wife software selection makes this accessible to everyone. For newcomers I recommend the RTL-SDR subreddit, plenty of great resources. My latest venture is a jam and replay attack on keyless entry systems eg vehicles, project page is here: https://github.com/trishmapow/CC1101-FSK https://github.com/trishmapow/CC1101-FSK
- mberger 9y agoavailability of cheap hardware and wife software selection If only that was true... ;)
- acidburnNSA 9y agoThe rtl-sdr dongles are like $15. They're usually recieve only, and you need more like $300 to get a HackRF One for serious work.
- iamatworknow 9y agoYes, but which wife software do you use?
- qubex 9y agoA socially-conservative Tinder clone that books you both into a church on the first mutual right swipe.
- iamatworknow 9y agoPewter?
- bjt2n3904 9y agoNot gonna lie. As a radio guy, our terminology is messed up. My favorite though is using superlatives. Low Frequency (LF), Medium Frequency (MF), High Frequency (HF). You'd think that maybe HF is WiFi, but you gotta remember these terms were invented back in the early days of radio. HF is between 3 and 30 MHz. You have Very High Frequency and Ultra High Frequency, but that only takes us to 3 GHz. 5 GHz Wifi is technically SHF -- or Silly High Frequency. But we also refer to these frequency bands in terms of MHz, or if we feel like it, wavelengths. Since radio signals travel (effectively) at the speed of light (m/s), we can multiply Hz (1/s) by a distance and get wavelength. (c = f * l). 144 MHz then is the 2 meter band, or VHF as we call it. Confused yet? Wait until we start talking about baseband and I/Q signals!
- flashdance 9y ago> 5 GHz Wifi is technically SHF -- or Silly High Frequency For those curious, op's right and it actually is SHF, but it stands for Super High Frequency. I don't understand humour, only RF (and even that, barely). https://en.wikipedia.org/wiki/Super_high_frequency https://en.wikipedia.org/wiki/Super_high_frequency Here's a fun semi-relevant science experiment you can do at home: running a microwave will kill nearby wifi and bluetooth connections. Isn't that strange? Try it with a par of bluetooth headphones right now!
- NightlyDev 9y agoI really don't know much about radio, but I have never experienced that the microwave have noticeably affected wifi or bluetooth. Is it something that is only likely to happen with older and less isolated microwaves?
- mi100hael 9y agoYeah, modern microwaves shouldn't be leaking that much RF
- flashdance 9y agoWhy wouldn't they leak RF? They aren't legally required to limit emissions at 2.4ghz.
- officialjunk 9y agois there any legal limit?
- flashdance 9y agoThe FDA has one, but it's based on a maximum safe exposure to humans--which makes it fairly lenient.
- 9y ago