Serial Port SDR

Re:Serial Port SDR by krenzo on Thursday December 06, 2018 @10:07AM (#18618545)

As mentioned in the first sentence, the RTL-SDR project is out there. You can easily buy a $20 USB Software Defined Radio with software that will handle everything for you and lets you play around with an SDR: https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/

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Re:Serial Port SDR by squarefoot on Thursday December 06, 2018 @02:27PM (#18621210)

For roughly the same price there are some DVR boards that could be converted to SDR operation once they're hacked. They already use embedded Linux although no source is provided.

https://www.aliexpress.com/item/OUERTECH-5-in-1-AHD-CVI-TVI-...

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Re:Serial Port SDR by rhinoceraptor on Thursday December 06, 2018 @04:52PM (#18622657)

You can also get HackRF clones, for about $100:

https://www.aliexpress.com/item/HackRF-One-1MHz-to-6GHz-SDR-...

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Re:Serial Port SDR by squarefoot on Friday December 07, 2018 @12:05PM (#18629336)

Yup, I know the HackRF. Being too old to write Santa a letter I'm already saving money for that gift:).

Anyway my point was that those cheapo DVR boards are just asking to be repurposed for other tasks, SDR is just one of them, that chipset specs are interesting. https://www.burglaryalarmsystem.com/pdf/Hi3520.pdf

Here are some firmware files for a few models, hopefully compatible with that one. Binwalk-ing them shows they're normal ARM Linux images.

https://domar.com/support/softwares-firmwares/ip-firmware-up...

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Re:Serial Port SDR by wglb on Thursday December 06, 2018 @11:02AM (#18619134)

And you can have some serious fun with this with a not-very-powerful computer.

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