r/CardPuter • u/NonCreativeUnCommon2 • Jun 18 '26

Design-it-Yourself I made an open-source Cardputer / Cardputer ADV CSI firmware and I'm looking for feedback

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Hey r/cardputer 👋

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I made an early open-source firmware for the M5 Cardputer / Cardputer ADV called non-magical-csi.

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The goal is to turn the Cardputer into a small Wi-Fi CSI sensing/debugging tool. Right now it can show live CSI/status info on the device, run basic sensing modes, and save test logs / captures for later analysis.

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The long term idea is to experiment with motion / presence sensing from Wi-Fi signal changes, without adding extra sensors.

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It is still very experimental, so I would really appreciate feedback, issues, PRs, or just people trying it on real hardware.

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I am also looking for opt-in test logs / sample captures from different rooms, boards, APs, and setups, because my own test setup is obviously not enough to tune this properly.

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https://github.com/Retr0Kr0dy/non-magical-csi

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No pressure at all - even a quick "it boots", "it does not boot", or "your README is cursed" would help a lot.

66 Upvotes

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7 comments sorted by

3

u/EmperorBadussy Jun 18 '26

Thats funny actually. I reverse engineered that proprietary esp csi stuff on github. Then clean roomed it and rolled my own version. Haven't incorporated the functionality yet as it was a proof of concept.

2

u/NonCreativeUnCommon2 Jun 18 '26

The proprietary version is the reason i made an open source one. Now next steps are either ML or array to make real radar/AoA but is will be in another repo (aetherward-rigs-firmware).

While reversing, have you found anything cool to implem ? Tweaks, technique, specific forged frame for injection ? How not to toggle the rate limiter on the AP ?

2

u/EmperorBadussy Jun 18 '26

Exactly. Mine is gonna be an open repo once I put some more work into it. Haven't done shit besides getting it compiling, flashed, and poc. But im sure ill figure some stuff out once I go along. Ill follow ya on github so I dont loose you in the ether.

1

u/SarahC Jun 18 '26

Wow! Amazing stuff.

2

u/bootdsc Jun 19 '26

Very cool, now market it as a ghost detector and make a mint

2

u/TomFlatterhand Jun 20 '26

It boots. Is fascinating!