josip at lanl.gov
Thu Nov 20 00:49:31 EST 2003
Geoff Galitz wrote:
> I need to put together a little system which can
> monitor the temperature of a machine room, and
> when a certain threshold is reached, trigger a
> program to run.
If cost must be minimized, how about a cheap $10 thermostat suitably
wired to a serial port DCD or CTS line? This may provide on/off thermal
signaling (e.g. some UPS units use this method to signal power failures).
On a related note, Mark Hahn mentioned this back in June:
which could be useful in somewhat different situations...
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