nanoCH32V203 VS kanata

If you are willing to try r/RISCV ones, then nanoCH32V203 (with two Full-Speed interfaces) and nanoCH32V305 (with one Full-Speed and one High-Speed interface) might be enough.

There are dual USB r/RISCV boards with GPIO pins exposed, like nanoCH32V203 and nanoCH32V305.

Another alternative is to use dual USB MCU board like nanoCH32V203 as USB CDC relay.

RISC-V boards cost $3-$6 depending if you want high speed USB or full speed one.

Their earlier boards like nanoCH32V203 and nanoCH32V305 were more user friendly, one could flash those via USB without WCH-Link.

Muse Lab has MCU boards like nanoCH32V203 and nanoCH32V305.

The same form factor as nanoCH32V203, but with more RAM and storage, also one of USB interfaces is high speed and SDIO is native this time. Comparable to CH32V307 boards, but lacks ethernet port.

Speaking of hardware there is very nice $3 RISC-V board that would fit well USB to USB converter use case. No keyboard firmware is ported to it yet.

Gotta give a shoutout to kanata[1] which I have used daily for years at this point after giving up on QMK-powered keyboards.

QMK itself is great, but I was never able to find a non-columnar split ISO keyboard to use it with. Eventually I reluctantly settled on the Logitech K860[2] and I'm now happily using my favourite features from QMK with kanata at the software level.

[1]: https://github.com/jtroo/kanata

[2]: If I'm behind the times and there is now a QMK-compatible keyboard that looks like this, please let me know!

This is not in Emacs, but if I can't modify my keyboard's firmware (e.g on a laptop), I use Kanata https://github.com/jtroo/kanata. It works by creating a virtual keyboard in Linux (and uses a filter driver or process hooks in Windows), so it can work in any program as they just see a normal keyboard.

Besides the better caps word (by the way, you can have it in software in Win/Linux apps like https://github.com/jtroo/kanata/blob/main/docs/config.adoc#c...) you can also toggle capslock with e.g. a double tap while having on-hold functionality to the more useful Control, so you still wouldn't need to hold any modifier key

jtroo/kanata: Improve keyboard comfort and usability with advanced customization (github.com)

One particular approach that one might find it interesting is how the configuration is laid out (using S-expression from Lisps).

[0] https://github.com/jtroo/kanata/blob/main/docs/config.adoc

Kanata[0] is amazing. It support both Linux and Windows. But I'm yet to try it on windows because my majority work is on linux.

[0] https://github.com/jtroo/kanata