next »

[duane]

Hi Folks,

I am trying to get a USB-based temperature monitor (hobby-boards.com) to work on my XO.  The program to read it is digitemp, which is in the repos (both F9 and Ubuntu).  With teapot's Ubuntu 8.10, everything works.  The problem comes with the standard OS (8.2).  I can see the device with lsusb (installed with the usbutils package), but digitemp doesn't find it.  The firmware and kernel seem to be the same between the two distributions, and I have had the same experience with the newer 3.6 version of digitemp I grabbed at the site (digitemp.com).  I want this to work with a standard installation because it seems a great tool for environmental education projects.

Thanks for any ideas, Duane

[duane]

Hi again,

In reply to my own question, turns out the digitemp sources have USB support disabled by default.  My guess is that the rpm version uses that default, but the Ubuntu packager needed the USB (like me), so enabled USB support.  If you have teapot's version of Ubuntu 8.10 on SD, as I do, you can just copy that version over from /media/OLPCRoot/usr/bin to /usr/bin while booted to the standard OLPC distro, and use it with the USB hardware mentioned above to read OneWire temperature sensors.

Maybe I will take some photos of the setup to give some ideas to those who might be interested in a similar project in computer instrumentation of environments for a class project.  It is really simple to do and reasonably inexpensive.

Cheers, Duane