Your server has sensors built in, and there are server agent packages from HP[aq], although you may have to massage them a little to install on Debian.

Some other equipment you use may also include temperature sensors and support SNMP already - e.g. APC UPS units do.  They can also be configured with extra external sensors.

For querying SNMP devices, there's my snmpvar.monitor (in contrib) that comes wiith some examples.

For easy monitoring of a bunch of locations in a server room, a colleague here has come up with a nice Q&D solution based on Dallas Semiconductor digital sensors.  He uses plastic RJ45-to-RJ45 adapters (f-f extenders), drills a hole in the middle, solders a DS1820 onto two of the wires, and closes the hole / attaches the 1820 with epoxy.  

This way, you can daisy-chain quite a number of these sensors using existing patch cables (you can tell them apart by their serial numbers).  The whole lot then attaches to a server through a ready-made 1wire/serial interface.

See also http://owfs.sourceforge.net/index.html for a cool way of accessing the bus.

--Peter

-----Original Message-----
From: pyc@mybestonline.com [mailto:pyc@mybestonline.com]
Sent: Friday, June 25, 2004 7:47 PM
To: mon@linux.kernel.org
Subject: Required Temperature Sensor(s) for " Mon"?

Hello All:

I'm a Newbie; thanks for the forum. I'm using compaq ML370 G3 (Debian3.0r2) and would like to use mon.
 
Could somebody please suggest to me which Temperature Sensor(s) one could best use with mon.
Are there Network Cards(etc.) that could carry such Temperature Sensors

Thank you, peter 

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