Hi,
By chance a DIY article "How cool is Perl" by Michael Schilli in Issue 55
of Linux Magazine April 2006 has an article about temperature sensing.
The article is not on the web yet but the gist is
Solder a DS18S20 temperature sensor to a cable with an RJ11 plug at the
other end. The plug goes into a DS9490R USB dongle which is accessed under
Linux using sourceforge projects owfs, fuse and swig. The published
magazine code is already online at
http://www.linux-magazine.com/Magazine/Downloads/65/Perl
Not exactly Data Centre grade but perhaps plausible at smaller sites.
I had previously googled for something to defend our clusters against
marginal air conditioning and ended up down the road in Stirling.
See
http://www.linux-usb-daq.co.uk/howto2/temperature
There are probably lots more alternatives out there
--
David Martin
Kelvin Building,
University of Glasgow,
Glasgow, G12 8QQ,
United Kingdom
tel: (0)141 330 4197 fax: (0)141 330 5881
email: [log in to unmask]
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