i've givent up on tinkering with the UPS. instead i got a light-controlled-switch kit from DEECO, removed the light detector and shoudl be connecting it to DTR pin of serial port. the problem is that the POST (power on self test) of the computer flips values of the serial port pins therefore causing an unintentional shutdown of the other node. (someone else has thought of connecting the DTR directly to the ATX power switch of the backup server).
a delay circuit should solve the POST problem though. Paul Patrick Carpio Prantilla said: > On Sun, 2004-03-14 at 12:00, [EMAIL PROTECTED] wrote: >> anybody has hacked UPS circuitry to make it shutdown (even without a >> power >> failure) when a signal is given thru the serial port? >> all upses that shutdown when a signal is raised only do so in a (mains) >> power failure. > Hi, > > I've never dealt directly with UPS, but from my experience with with > serial ports, you typically send the hardware a signal in the form of a > hex code that tells the device what to do. With this in mind, you'll > need the technical manual of the UPS provided by it's manufacturer for > the hex codes (or whatever the device uses). Let's just hope it's > available to the public so you don't have to tinker with the circuitry > itself. > > -Paul -- Philippine Linux Users' Group (PLUG) Mailing List [EMAIL PROTECTED] (#PLUG @ irc.free.net.ph) Official Website: http://plug.linux.org.ph Searchable Archives: http://marc.free.net.ph . To leave, go to http://lists.q-linux.com/mailman/listinfo/plug . Are you a Linux newbie? To join the newbie list, go to http://lists.q-linux.com/mailman/listinfo/ph-linux-newbie
