Add this following line to the "Additional Board Manager URLs",

https://github.com/ambiot/ambd_arduino/raw/master/Arduino_package/package_realtek.com_amebad_index.json

Then install Ameba D (BW16) package from the board manager

Use Arduino IDE to upload the code (available on Github) to Ameba BW16

3D print the case and base then use hot glue to secure both the encoder and the BW16 dev board to the base, connect pin 8 of BW16 board to the encoder switch pin and Vcc to encoder's GND

Upon powering up, your PC will be able to find a bluetooth keyboard named "AMEBA_BLE_HID", connect to it and your PC will automatically re-connect to it everytime it become discoverable

Just follow steps in this link to install it to your PC

https://github.com/nvbn/thefuck