>>>>> "Gilbert" == Gilbert Wilson <[email protected]> writes:
Gilbert> We're having some issues with temperature control in our office. Depending Gilbert> on the day different staff say it's too cold or too warm. There appears to Gilbert> be some big temperature variances across the building (it's not just Gilbert> personal preferences, but I'm sure that's part of it). The HVAC people say Gilbert> that they don't see any issues when they visit the office. With answers Gilbert> like that, I think they use to be sysadmins! Heh, we have the same problems in our office, since all the heating/cooling vents are located at the edges by the windows. So people under them freeze/boil, while others feel the complete opposite. Gilbert> I'd like to place temperature sensors across our office and Gilbert> trend their data via snmp. My initial thought was to get some Gilbert> server room sensors and put them in strategic locations Gilbert> throughout the building and move them around every few Gilbert> weeks. But, that's a lot of work for imprecise data. If Gilbert> possible, I'd like to have one central temperature sensor in Gilbert> my network closet and rj45 sensor probes in as many as 50 Gilbert> rooms via the building's wiring infrastructure. Has anyone Gilbert> done anything like this or know of a temperature sensor setup Gilbert> that can accommodate (or scale) to this size? Most of the Gilbert> systems I'm familiar with only accept a few probes and don't Gilbert> scale at all. If you have the time and energy go look at the Dallas One Wire system of sensors and readers. In a past life I built a temperature logging system using cat5 cables and serial port readers. Then I used the 'digitemp' software to grab the data and log the results into an mrtg like graphs. Very nice stuff. You can go get the software at digitemp.com but he's not selling any hardware at this time. You can buy sensors and such at: http://www.ibuttonlink.com/collections/1-wire-products Personally, I just got a bunch of DS-1820 sensor modules, and wired them up onto RJ45 plugs so I could just daisy chain them. It's at work right now, but I'll try to send you (or anyone else) a picture with the details of what I used. So it cost me time to solder it all together, but not much more. If your time is valuable, the above site might work well, but the modules aren't what I think of as good design. Ah... if you look at their page you can find the T-SENSE-SD, which is very much like what I buit. And it looks decently cheap. You could setup a network with 50 sensors and such for under $600 or so I bet. Maybe a little bit more. Hopefully you can use existing wiring and such. Good luck. John _______________________________________________ Discuss mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
