David Fletcher wrote: > My employer wants to do environmental monitoring and logging of > temperature and humidity in an instrument calibration room. > > I'm looking at an environmental monitor called the Sensatronics EM1 made > by a company called Open Extra. It plugs into a network outlet and > operates with SNMP. > > What I'm thinking might be possible is to have a script running on one > of the Linux boxes as a cron job, to periodically interrogate the > environmental monitor and add date, time, temperature and humidity to a > log file each time. > > Has anybody had experience of doing this, please? You can do simple queries with snmpget like I do to get page counts from printers: echo `snmpget -v 1 -c public kem5100 -Oqv .iso.org.dod.internet.mgmt.mib-2.43.10.2.1.4.1.1` `date` >>kem5100.log (It's on one line). Do you have a MIB file for the device? Else you would have to use snmpwalk and a bit of guessing to get the OID correct. You can also use MRTG to collect the data and have them displayed graphically. Mogens -- Mogens Kjaer, Carlsberg A/S, Computer Department Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark Phone: +45 33 27 53 25, Fax: +45 33 27 47 08 Email: mk@xxxxxx Homepage: http://www.crc.dk
