- Open the Wii Balance Board, unscrewing everything at the bottom
- Unplug the cables from the print
- Unsolder the 4 load cell's connections at the print and remove the print from the balance board
- Solder the cables with the same colors of the 2 load cells on the left side of the board together, making them parallel.
- Do the same for the two load cells on the right side of the board
- Connect these new parallel connections of left and right to two HX711 prints, one for each side. For a RED (sparkfun) HX711, you want to wire them on the left side of the HX711 print in the order Red-White-Blue-Green from top to bottom. Some pins will be left over at the bottom, that's normal. If you have a GREEN HX711 print, the order is Red-White-Green-Blue. If the HX711 print has a VDD and VCC, you should solder these together at the bottom of the print.
- Make some room inside the balance board by prying out the plastic using large nippers or similar tools.
- Connect the SCK and DT ports of the first HX711 to A0 and A1 (for instance)
- Connect the SCK and DT ports of the second HX711 to A2 and A3 (for instance)
- Plug in the Arduino and upload the .ino file found in the Firmware/bbusb directory
- Make sure you get readings in the serial window that change as you press onto the load cells (Note: The balance board will perform a calibration step of about 4 seconds every time it boots, do not put pressure on the board until the calibration step is finished)
- Close up the balance board, removing the button of the balance board and running the USB cable through there
- Plug in the balance board
- Download the bbusb GUI from Releases or run the code yourself
- Run bbusb GUI once and close it, edit the config file to set the right COM port for the balance board
- Start bbusb GUI with the balance board plugged in and play