Part 2. Hardware Tweaks
Nintendo assumed you would always power your Wii Balance Board with four AA batteries and included no AC power adapter. Having only battery power would be a non-starter for this project considering the inconvenience of getting to the battery pack once it is under an 80+ lb refrigerator. Luckily, there are several third-party adapters made for the Wii Balance Board that we can use to provide constant power from a wall outlet. The Wii Fit Rechargeable Battery Pack (http://www.amazon.com/gp/product/B001D21F58) is a perfect solution to our power problem. Replace the batteries with this battery pack, and plug the ac adapter into a wall outlet.
Having to pair the Wii Balance Board and Raspberry Pi every time we run our Python script presents a problem due to the location of the sync button. The sync button is inaccessible with a refrigerator sitting on top of it. We can fix this by making a hacky little lever using a pencil and three 3/8" felt pads as shown above. The rechargeable battery pack exposes the sync button to the underneath surface of the Board. Tape a pencil (or something similar) that spans from the sync button to the outside front of the Board. Stack three 3/8" felt pads (or something similar) on the center (ish) of the pencil to create a stationary pivot. Be careful to not expose too much of the pencil out from the Board as you don't want someone to accidentally kick it out. Flip the Board over and you can press the sync button by simply pressing down on the lever. Hacky but effective.
Depending on the surface that your refrigerator sits on, you may need to remove the rubber grip pads from the feet of the Board (the pads are simply stickers you can pry off). If you slide your refrigerator on a hardwood or tile floor to put it into place, the 3/8" felt pads can be placed on the Board's feet for easy sliding.