This project uses GH60 satan PCB, nRF24 wireless module, LiPo(Li-ion) battery and charger module. I am using HHKB but this layout keyboard is hard to buy and expensive. So I start to build my own HHKB with GH60 satan.
Refer to https://github.com/jangson/tmk_keyboard_custom.git
See http://tmrh20.github.io/RF24 for all documentation