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Topic: Been doing real-time measurements with Mathematica! (Wii Balance
Replies: 5   Last Post: Apr 19, 2009 4:51 AM

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sjoerd.c.devries@gmail.com

Posts: 893
Registered: 10/6/08
Been doing real-time measurements with Mathematica! (Wii Balance
Posted: Apr 15, 2009 4:58 AM
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Just wanted to report that for the first time in my life I've been
using Mathematica to do actual real-time measurements in an experiment
that I'm currently performing. Jay!

I'm using a Wii balance board (from the Wii fit game) to measure
changes in my subjects' centre of gravity.

The Wii Balance Board connects through bluetooth to my laptop. Using
the programs GlovePIE (http://carl.kenner.googlepages.com/
glovepie_download) and PPJoy (http://www.geocities.com/deonvdw/Docs/
PPJoyMain.htm) and a small script I wrote for GlovePIE this is
converted to a virtual Windows joystick X,Y values which can be read
directly and easily using Mathematica's ControllerState function.

This gets me about 400 samples per second. A real-time plot of the
user's motions reduces it to about 20 Hz. Still not bad at all, and
very useful. Works for the Wiimote (acceleration sensors!) as well.

Cheers - Sjoerd




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