keychron_qmk_firmware/keyboards/kb_elmo/bm42/readme.md

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# BM42
![BM42](https://i.imgur.com/DljDoaTh.jpeg)
A simple drop-in replacement PCB for the KPRepublic BM43 keyboard.
* Keyboard Maintainer: [kb-elmo](https://github.com/kb-elmo)
* Hardware Supported: BM42 rev.1 PCB
* Hardware Availability: [Open source project](https://github.com/kb-elmo/bm42)
Make example for this keyboard (after setting up your build environment):
make kb_elmo/bm42:default
Flashing example for this keyboard:
make kb_elmo/bm42: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 top left key and plug in the keyboard
* **Physical reset**: Briefly short the two contacts labeled "RESET" on the back of the PCB
* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available