QMK

Prepare dev environment under Linux

git clone https://github.com/qmk/qmk_firmware.git
cd qmk_firmware
python3 -m venv env
source env/bin/activate
python3 -m pip install wheel
python3 -m pip install qmk

qmk
qmk setup

Prepare keyboard files

• QMK/DuckyOne2SF + Teensy

Compile firmware

qmk compile -kb duckyone2sf -km default

Flash firmware on Teensy under Windows

• Teensy Loader Application
  • https://www.pjrc.com/teensy/loader.html