Gqrx VS Universal Radio Hacker

If you don't need the web interface and your usual desktop SDR software supports rtl-sdr tcp mode, you can easily set up a small board that calls rtl-sdr with the appropriate parameters so that it will wait for a remote connection from the above software, not unlike what happens with WebSDR, but you would be using your usual desktop SDR application which would be native and much more snappy than a web browser. ... - Source: Hacker News / 6 months ago

GQRX works pretty well for me. There is also CubicSDR and SDRAngel afaik - you might just want to play around with them and see which you are most comfortable with. Source: 9 months ago

For most signals (including analog AM and FM modes) you can use a laptop with an RTL-SDR USB dongle (fairly cheap), or another SDR, and a reasonably tuned antenna. Various RTL-SDR models can tune from around 500 kHz up to 1.75 GHz with 3 mhz of bandwdith, and works with free software like SDR# for Windows and GQRX for Linux. It works with lots of other software, too, for ham modes, digital modes, etc. Source: over 1 year ago

Some of the Crossfire modules have a rudimentary spectrum analyzer function on them that might help you identify if there are other devices operating in the 900MHz band around that area, but I'm not sure the nano TX is one of them. I have a couple RTL-SDR dongles or equivalent I'd use with GQRX as a cheap spectrum analyzer if possible. Source: over 1 year ago

Yes, a dongle from https://www.rtl-sdr.com/ Then I use gqrx to record the signal. https://gqrx.dk/ and SOX to downsample it https://sox.sourceforge.net/ Then pass it through wxtoimg to get the picture https://www.wraase.de/wxtoimg/. Source: over 1 year ago

>> or somewhat expensive and complex SDR I don’t think that’s as accurate today as it used to be. On the hardware side there are tons of options very cheaply available - iirc the flipper uses the c1100 (or a number like that) it’s a popular cheap chip and it’s well documented and interfaces easily with arduino. More accessibly, lime mini SDRs are cheap but there’s quite a few alternatives too. On the software side... - Source: Hacker News / 3 months ago

You should check out Universal Radio Hacker. Source: about 1 year ago

URH can read flipperzero sub files and can export from wav to sub... Https://github.com/jopohl/urh. Source: about 1 year ago

Throw the recording at UniversalRadioHacker and see what it does with it! Source: about 1 year ago

I dont have much knowledge on decoding a signal from scratch but try URH - universal radio hacker here. It might be able to do what you need. Source: over 1 year ago