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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 everyt
by krenzo 8y ago
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/ https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/
- wglb 8y agoAnd you can have some serious fun with this with a not-very-powerful computer.
- squarefoot 8y agoFor 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-IP-CVBS-4CH-CCTV-DVR-board-1080N-2-SATA/32860968547.html https://www.aliexpress.com/item/OUERTECH-5-in-1-AHD-CVI-TVI-...
- rhinoceraptor 8y agoYou can also get HackRF clones, for about $100: https://www.aliexpress.com/item/HackRF-One-1MHz-to-6GHz-SDR-Platform-Software-Defined-Radio-Development-Board/32809842995.html https://www.aliexpress.com/item/HackRF-One-1MHz-to-6GHz-SDR-...
- squarefoot 8y agoYup, 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 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-updates.html https://domar.com/support/softwares-firmwares/ip-firmware-up...