I was wondering if you could give me the code you used to pull this off? I would really appreciate it. Also, does the code work if say the weight was placed in the exact center of the boar? If not, what would need to be modified. Thanks for the help and the awesome video!

Thanks,
Tim

does anyone know how many balance boards can be attached to a PC at any one time?

The reasons I ask is that if I could attach 4, it would be a great alternative to paying >£1000 for a weigh scales for racing cars! (If the max capacity is large enough – would need about 200kg/corner – does the board run out of sensor range before then?). The fact it has multiple sensors per board could also be used to calculate the caster and camber of the tyres as well! Perhaps even the toe settings….

Will.
we are doing something similar, also at a university. We write a plain text file. We took Matt’s wmdemo
c file and added a case after case ’s’:
case ‘Z’:
tiempo=100*100;
fout=fopen(“salida”,”w”);
if(fout == 0)
{
printf(“Can’t open file \n”);
break;
}
for(i=0;i < 100*20; i++)
{
if (cwiid_get_state(wiimote, &state)) {
fprintf(stderr, "Error getting state\n");
printf("Error getting state\n");
}
fprintf(fout," %d ",i);
miprint_state(&state);
usleep(tiempo);
}
fclose(fout);
printf("finished\n");
break;

The output file is called 'salida'. We process it afterwards using matlab or octave.
Write to us if you want the whole file (claraeugenia4444@gmail.com).
Or, to use scalesgui.py, there are instructions por file i/o in python at
http://www.penzilla.net/tutorials/python/fileio/
Have fun.

Ultimately I would be interested in a tracking of COG of the person on the balance board under a few differing conditions with pre and post treatment data collection. The data sets would be captures every second or so that could then be graphed and manipulated later with google spreadsheets etc. Or even captured to a text file would suffice.

The problems seem to be multiple with each step. I am attempting it on a eeepc, with ubuntu 9.10. All apps are installed (the “libtool” tip from praxis helped) but progress stalled after compiling where the device seemed to not connect. The wii remote worked fine but the balance board itself was not recognised.

Please help!

Will

http://74.125.77.132/search?q=cache:pUno80xq8E4J:abstrakraft.org/cwiid/attachment/ticket/63/weighdemo.py+weighdemo.py&cd=1&hl=en&ct=clnk
http://74.125.77.132/search?q=cache:GkT-z8g_rF0J:abstrakraft.org/cwiid/attachment/ticket/63/scalesgui.py+scalesgui.py&cd=1&hl=en&ct=clnk

While the actual cwiid code has moved to http://github.com/abstrakraft/cwiid this doesn’t
include your sample-scripts.

Does anyone know how to avoid the need for hitting the 1&2 buttons?
After I’ve talked to it once and have the bdaddr, I would have thought I could use that to establish contact as soon as my computer and the wiimote could see each other.
Any thoughts?

cd …/abstrakraft-cwiid-2100f14/
sudo apt-get install libtool
sudo apt-get install automake
aclocal
autoconf
./configure
#I had done a previous install of the exeuctables
#sudo apt-get install bluez-utils libbluetooth-dev libbluetooth2
#sudo apt-get install libcwiid1 libcwiid1-dev wmgui
#sudo apt-get install wminput
#sudo apt-get install lswm
#sudo apt-get install wmdemo
# so they recomend removing the other libs….
sudo make uninstall && make uninstall_config