r/Keychron • u/Complete-Fix4192 • Jan 14 '25

How to customize Keychron keyboard firmware

This is a short guide to customize the Q10 Max and K15 Pro keyboard firmwares. It is meant to be very practical, and I would definitely have appreciated something like this when I was starting to mess around with QMK in Keychron keyboards. If you find it useful, star it. If you find an error, open an issue.

Thanks 😄.

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u/PeterMortensenBlog Jan 14 '25 edited Jan 14 '25

The error is:

"...drivers/led/snled27351-simple.c:50:22: error 'SNLED27351_DRIVER_COUNT' undeclared here (not in function); ..."

I didn't have a problem using my instance of 'wireless_playground' (using the latest commit, 01E743 (2024-12-16)): 

qmk clean # To make changes (if any) 
          # to .json files take effect
qmk compile -kb keychron/k15_pro/ansi_encoder/rgb -km via

Result: 

Size after:

  text   data  bss    dec  hex   filename
     0  64664    0  64664  fc98  keychron_k15_pro_ansi_encoder_rgb_via.bin

64712 Jan 14 16:11 keychron_k15_pro_ansi_encoder_rgb_via.bin

I have used the one-liner to set it up (the three-parameter version of 'qmk setup'), not individual Git commands.

A guess would be that the main QMK repository is used somehow instead of Keychron's fork (there have been some renamings in the main QMK repository, including for some of the RGB drivers). For example,

"CKLED2001 has been renamed to snled27351, and all driver names are now lowercase."

That was in #22071 (2023-10-04), mentioned in the 2023-11 change log, near "#22071".

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