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We have bought, but haven't yet setup (It would be a good student project! ) one of these "Goose" boxes: http://www.itwatchdogs.com/wxgoos-instructions.shtml which has line drivers to allow one to setup a network of the one-wire sensors...the individual sensors are pretty cheap (but it took about 3 months to order a box of 100 from the US) cheers, Alex On Wednesday 29 March 2006 21:33, David Martin wrote: > 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 -- ------------------------------------------------------------------------------ | | | Dr. Alex Martin | | e-Mail: [log in to unmask] Queen Mary, University of London, | | Phone : +44-(0)20-7882-5033 Mile End Road, | | Fax : +44-(0)20-8981-9465 London, UK E1 4NS | | | ------------------------------------------------------------------------------