QMK

Hardware

• buy boards and switches
  
• solder together
  
• print enclosure
• https://www.ebay.com/itm/292337946151 
• https://chome.nerpa.tech/usb-host-shield-hardware-manual/

Software

• https://docs.qmk.fm/#/newbs_building_firmware
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 Future work

• https://docs.qmk.fm/#/feature_macros
•  https://www.seeedstudio.com/Seeed-XIAO-BLE-nRF52840-p-5201.html

Ref

• https://github.com/marcefanitoli/qmk_firmware
• https://yaowei.dev/posts/usb-to-usb-converter/
• https://thomasbaart.nl/2018/12/01/reducing-firmware-size-in-qmk/
• https://geekhack.org/index.php?topic=80421.0
• https://geekhack.org/index.php?PHPSESSID=hbqhfsa8pkq2ic6376bgdfb6r0hhu5af&topic=69169.0
• https://docs.qmk.fm/#/flashing
• https://blog.lewys.eu/?p=323
• https://docs.qmk.fm/#/feature_layers
• https://github.com/qmk/qmk_firmware/blob/master/docs/feature_dynamic_macros.md
• https://jayliu50.github.io/qmk-cheatsheet/
• https://config.qmk.fm/#/converter/usb_usb/pro_micro/LAYOUT_all
• https://www.adafruit.com/product/2756