It's a planck keyboard using an Adafruit Feather 32u4 Bluefruit LE (https://learn.adafruit.com/adafruit-feather-32u4-bluefruit-le/overview).
sudo apt-get install avr-libc gcc-avr
git clone https://github.com/qmk/qmk_firmware.git
cd qmk-firmware
git submodule add https://github.com/lgranie/qmk-lge47.git keyboards/handwired/lge47
make git-submodule
make handwired/lge47:default