Date: Mon, 26 Nov 2001 18:27:43 +0800 From: "Kathy Quinlan" <katinka@magestower.com> To: <freebsd-questions@FreeBSD.ORG> Subject: Re: Dumb UPS support under FreeBSD? Message-ID: <080501c17665$1185a430$fe00a8c0@wskatinka> References: <3C01F367.8646.DBFD8@localhost> <3C020FDE.24171.7CF4E7@localhost>
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Hi all, We build and design such modules, for all "dumb ups's, they are based on an AVR micrcontroller, and interpret the signals to and from the UPS, and when a power down command is issued (by toggling DTR CTS) we delay by a user amount (sent to the module through the serial port). We custom build these units, and hope to have a range on the market soon. But for a one off, if you tell me the model of your UPS I can give you a quote, (most modules are priced around us$35 +shipping) communication to the module is by any terminal program of your choice. Regards, Kat. ____________________________________________________________________________ /"\ ASCII Ribbon Campaign | K.A.Q. Electronics \ / - NO HTML/RTF in e-mail | Software and Electronic Engineering X - NO Word docs in e-mail | Perth Western Australia / \ | Ph +61 419 923 731 ____________________________________________________________________________ ----- Original Message ----- From: "Kjell" <kmidtset@c2i.net> To: "Ted Mittelstaedt" <tedm@toybox.placo.com> Cc: <freebsd-questions@FreeBSD.ORG> Sent: Monday, November 26, 2001 5:48 PM Subject: RE: Dumb UPS support under FreeBSD? > From: "Ted Mittelstaedt" <tedm@toybox.placo.com> > To: <kjell@la3sg.net>, <freebsd-questions@FreeBSD.ORG> > Subject: RE: Dumb UPS support under FreeBSD? > Date sent: Mon, 26 Nov 2001 01:15:39 -0800 > > > >-----Original Message----- > > >From: owner-freebsd-questions@FreeBSD.ORG > > >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Kjell > > >Sent: Sunday, November 25, 2001 11:47 PM > > >To: freebsd-questions@FreeBSD.ORG > > >Subject: Dumb UPS support under FreeBSD? > > > > > > > > >List members! > > > > > >I am looking for a program that will work with my (Liebert) dumb UPS > > >that will perform an orderly shutdown of my computer by power fail, and > > >turn it back on again when power returns. > > > > > >I have spent some time with the bkpupsd program, and found that it > > >turns the UPS off at the same time it calls shutdown. Thus shutdown > > >does not get time to sync discs etc.. This renders bkpupsd useless for > > >machines with both latching (AT) and soft (ATX) power switches. > > > > > >I have found the mgeupsd and upsd programs in the ports collection. > > >Does anyone have any experience with these programs? > > > > > >Are there any other programs I may use? After some modification? > > > > > > > The difference between your Liebert dumb UPS and the APC dumb BackUPS (which > > is > > what bkpupsd program is written for) is that APC put a timer in the BackUPS, > > so that when the BackUPS receives the signal to shut itself off, it waits for > > a set period of time before actually doing it. Obviously the Liebert just > > shuts off immediately. > > > > If you have an ATX system that will indeed power itself off with bkpupsd, then > > you can change your UPS cable connections so that instead of the turn-off > > line being connected to DTR or CTS of the com port, it's instead connected to > > something like the 5v+ of the mouse port. Of course you will want to > > put in a 1K protection resistor or something like that so that you don't blow > > up the mouse port. The idea here is that this power will disappear when the > > ATX system shuts off completely by which it will then be safe to shut off the > > Liebert. Your going to have to do a little probing with a VOM to confirm > > that. > Good point. Will look into this. > > > > If, however, you have an AT system then you have a problem because logically > > it's impossible for a program to be written that toggles off the serial port > > AFTER the system is completely stopped - because once the system is stopped > > then programs cannot run, and since the system will still be powered and in > > operation, there's not going to be anything you can sense that is going to > > change > > state then. > > > > What you will need then is a black box that on receipt of a logic 0 from the > > com port controlled by bkpupsd, will wait a spell then signal it's own logic 0 > > to the Liebert. This could be anything from some relays and a capacitor, to > > something totally electronic built around a 555 chip. > I have followed this line, but I ended up with a small microprocessor > project to be built into the UPS in order to take care of all possible > races etc.. I concluded it was better to go out and buy a new smarter > UPS than do this. > > To turn my ATX back on again I have tried to use the "wake on ring" > feature, but it does not seem to be as reliable as I want. Another > possibility I see is to pulse the power on connector on the main board. > Do you see any other possibilities? > > Tnx from Kjell > > > > > > Ted Mittelstaedt tedm@toybox.placo.com > > Author of: The FreeBSD Corporate Networker's Guide > > Book website: http://www.freebsd-corp-net-guide.com > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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