qmk_firmware/keyboards/kprepublic/cstc40/rev3/readme.md
ClownFish e19991ec46
[Keyboard] Add CSTC40 rev3 (#25285)
* refactor cstc40, add rev3 fxtwink variant

* cleanup readmes

* readme nitpick

* add cstc40 aliases

* format-json

* add communty_layouts per code review

* touch copied legacy files for newline

* fix LED flags

* update readme files per code review
2025-07-07 13:14:12 -06:00

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# Rev 3
A 40% hotswap ortholinear RGB keyboard from KP Republic.
* **Revision 3: "FXTwink single pcb"**
* Keyboard Maintainer: [ClownFish](https://github.com/clownfish-og)
* Hardware Supported: CSTC40 rev3
* STM32F402RCT6 MCU without separate LED driver and using `tinyuf2` bootloader. Integrated USB connection.
* Hardware Availability: kprepublic.com
Make example for this keyboard (after setting up your build environment):
make kprepublic/cstc40/rev3:default
Flashing example for this keyboard:
make kprepublic/cstc40/rev3:default:flash
See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
## Bootloader
Enter the bootloader in 3 ways:
* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
* **Physical reset button**: Briefly press the button on the back of the PCB - some may have pads you must short instead
* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available