Post #4174164
2026-07-28 21:25 UTC
@adulau@infosec.exchange I see mention there of "repeated frame transfer" and inserted random noise. Does that mean that the underlying connection needs to be two-way? Have you considered rateless error correction as a method of doing broadcast-only transmission?
I've a couple of reasons for mentioning this. First, it's an area of interest of mine.
Second, I have a bunch of 433MHz transmitter/receiver pairs. They're probably not applicable to this since they've got their own encoder/decoder circuitry (for RC use). They're probably easily enough hacked, though, to bypass that and just use the tx/rx parts directly. Maybe with a Pi Pico as an SDR?
Replies (2)
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@muddle@infosec.exchange 2026-07-28 23:19
@adulau@infosec.exchange to answer my own question on Pi Pico... its PIO system is nowhere near fast enough for this freq band, though I did find people using it as an FM receiver... but only the sampling part... https://hackaday.com/2024/06/05/the-pi-pico-an-sdr-receiver-front-end/
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@adulau@infosec.exchange 2026-07-29 08:50
@muddle@infosec.exchange The protocol is not two-way. It's unidirectional. Repeated frame transfer is basically the loop to send continuously the frame to ensure that a receiver get the manifest and all the frame for the image.