HID VS qmk_firmware

I don't think the built-in keyboard library identifies itself as "boot capable" in the HID descriptor, which is necessary for simpler keyboard devices. Try using NicoHood's HID library with the "BootKeyboard" object.

Looks great! How did you handle the programming? Did you follow a guide, or did you implement the Arduino HID Project library?

Skip the esp then and pick up any dev board supported by the HID project.

You can make it act like a HID - which is what I assume many people have done - with custom drivers like this one. https://github.com/NicoHood/HID

You can use Arduino HID Project which allows to reprogram atmega16u2 which performs USB communications on Uno. Then you can upload HID sketch on 16u2 and "normal" code on atmega328 which would do everything and send desired wheel state via serial. On 16u2 side you will parse that serial command from 328 and translate it into HID message

I'm trying to grab the "microphone muted" LED status from the HID library, but it seems like the library only supports a select few statuses out of the box: https://github.com/NicoHood/HID/issues/151

https://github.com/NicoHood/HID for a real UNO

Nano (atmega328) doesnt have native USB support (just a USB to UART converter). UNO also doesnt have native USB support, but has a atmega16U2 on board. You can flash this chip and build a USB HID bridge -> https://github.com/NicoHood/HID/

Try using NicoHood's HID project and the system key page: https://github.com/NicoHood/HID/blob/master/examples/System/System.ino

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.

UPDATE: after fluffing around a little bit, I have manged to fix this code: https://github.com/qmk/qmk_firmware/blob/master/keyboards/lily58/keymaps/bongocat_wpm_responsive/keymap.c and flash it successfully - it seems not to be working correctly as the cat is only hanging there and does not respond to the wmp count. If anybody spots anything wrong in the code please let me know!(C is not my language but I am a programmer, I am gonna get at it again over the weekend if I have time left)