miryoku_qmk VS qmk_firmware

From what I understand this is enabled by default in Miryoku? Looking at this file: https://github.com/manna-harbour/miryoku_qmk/blob/miryoku/users/manna-harbour_miryoku/config.h

The qmk firmware is definitely what you want

Piantor is supported by Miryoku QMK in QMK master, so you can build it directly from there. However community layout support is missing in the older version of piantor in the miryoku branch, and the workflow merge feature is currently broken, so I can't run a workflow build at the moment, but here's one from earlier: https://github.com/manna-harbour/miryoku_qmk/actions/runs/3943408991

Here's a build run for crkbd on pro-micro with default options: https://github.com/manna-harbour/miryoku_qmk/actions/runs/4591161307. The artifact is here: https://github.com/manna-harbour/miryoku_qmk/suites/11977156021/artifacts/628488034.

Crowboard is supported in Miryoku KMK. Support will be added to Miryoku QMK on request. Via / Vial is not supported by Miryoku QMK but you should be able to enable it manually. Colemak Mod-DH is the default alpha arrangement for all Miryoku implementations.

You would need to read the part about substitution of layer here. You would need to copy your base layer from the miryoku_layers_alternatives.h and just change the button codes in the homerow and on the thumb keys. Should be pretty easily done.

Here's a default build for Corne. Flash that to both sides with QMK Toolbox. It'll start on Base which is Colemak Mod-DH by default. Hold the right hand home thumb and double tap the right hand top row middle finger key. That will switch to Extra, which is QWERTY by default. The double tap needs to be quite fast (within 200ms by default). You can use any thumb on either hand, so long as the double tap is on the same hand as the thumb hold.

My layout is essentially a slightly modified version of the already established Miryoku layout. My thumb key dual functions are unchanged from his layout. Since it is QMK/ZMK, anything configuration is possible so if you want to change which key activated which kayer, it can be changed. For me, I like the default becuase space/nav and backspace/num is really natural for me. One of my next build is gonna be a Ferris so I'm gonna move some things around but as long as my space and backspace keys are where my thumbs naturally rest, it should hw fine.

I only use keyboards running QMK or ZMK, so:

My Caps Lock key is a Control/Escape key (when tapped it behave like a Escape, when hold it's Control), and my left Control is a one shot layer switch key [1], which means I tap LCtrl once, and then press Caps Lock + 5 to get Ctrl+F5. Doable with single hand and more ergonomic as I have an unusually small hand.

[1] https://github.com/qmk/qmk_firmware/blob/master/docs/one_sho...

I agree that reduced finger movement is a crucial step in achieving typing efficiency. This is nicely solved by mod tap modifiers in QMK/ZMK[1] where key acts as a char when tapped and as a layer while pressed.

[1]: https://github.com/qmk/qmk_firmware/blob/master/docs/mod_tap...

Separate wireless controller, see the glue code at [0]

[0]: https://github.com/qmk/qmk_firmware/compare/master...nuphy-s...

If you have a keyboard that runs QMK firmware[0] with the VIA[1] feature enabled[2], then there is a convenient testing app available from the same place you customize your keys [3].

[0] https://qmk.fm/

I made a layout that I'm happy with. Spanish is my native language, so it has characters like the accents and 'ñ', but it's meant to be used for programming as well. Visual Studio uses a lot of Ctrl and Ctrl + Shift shortcuts, so I left them in the same place as the default Corne layout so I can press them both with my pinkie finger. Perhaps some of the ideas are useful to you.

Also, it would be possible to do this for the RP2040. However, it needs some work to get working. but for example: https://github.com/qmk/qmk_firmware/pull/20999

Ok, it's an ST7735, not too different from the ST7789. You should be able to get running by looking at their files in the QMK repo and going from there. You should also check their resources page.