I think I'll publish the #KiCad files soon, too.
Thanks to #platformio I can use the same code for both hardware variants.
#led #rgbled #ws2812b #diyelectronics #pcbdesign #codeberg #programming
Very interesting section about 1970s PCB design on this video; drawn by hand, yes, but the use of pre-printed transfer symbols and *VELLUM GRAPH PAPER!* :O https://www.youtube.com/watch?v=_YfN3LBaGkE&t=543s

Your BMS measurement error is probably a layout problem
Even with a good IC, poor PCB design ruins everything.
Top mistakes:
Shared ground paths for power and sensing
No Kelvin connection for shunt resistor
High-current traces too close to signal lines
📉 Result:
Offset errors, noise injection, unstable protection behavior.
👉 Fix:
Treat current sensing like analog precision design, not power routing.

KiCad 10.0 PCB Design and Electronics CAD Software Released as a Major Update
KiCad 10.0.0 released
It’s the turning of the seasons today, and to celebrate, the KiCad project is proud to announce the release of Version 10! This release is packed with new features, improvements, and hundreds of bug fixes. We hope you enjoy it! Head to the KiCad download page to get your copy (note that some packages may still be in the process of being released at the time this announcement is published). Our thanks go out to everyone who contributed to KiCad this past year. Whether your contribution was large or small, writing code, submitting bug reports, improving our libraries and documentation, or just supporting us financially: your help made a difference. Read on to see some of the highlights of the new version!
KiCad 9.0.8 released