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Re: UPS ON RS-232 (+) CLOSE TO SUICIDE !!



On 9/9/06, SERGIE <sgau2006 yandex ru> wrote:
Please help - spent a week 24hr/day, no results. Wouldn't not want anyone me
to suicide? I got fc5.

Windows detects the UPS with no problems, with out any additional settings. On
unix, I use /dev/ttyS0 (this is 100% correct, since windows is run on virtual
machine on the unix box).

So, when I try to use the same software from developer (IPPON, Model Back
Power 500 - "DUMB" UPS), written on Java and works and looks the same as in
windows, it can not detect the UPS (does no see anything) on the /dev/ttyS0,
on which windows within vmware detected it no problem.

I reckon I gotta set up some stop bits, parity and speed on the port.

"setserial" is no longer widely used, to I think "stty" is what I need.

THE QUESTION: what and how do I set up the device so that programs (apcupsd,
nut, vendor's software). And am I on the right way?

Some comments:
* /dev/ttyS0 is rw under the id I work. root's execution does not help either.
* kermit with 9600 connects and nothing received or echoed back.
* Whilst running programs under unix, /dev/ttyS0 is vacant.

Appreciate your help.

SERGIE.

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Hi SERGIE!

Ah RS232!

Most of the time I have seen people using RS232 to connect a UPS to a
computer they were simply using one or two of the "control Signals"
such as "Request To Send (RTS)" or "Clear To Send (CTS)" to
communicate to the computer that the UPS was on battery power or going
down shortly!

Often my "best friend" in the troubleshooting process was a volt ohm
meter (checking the voltage for establishing the state and level of
one of the control signals, or seeing the data make the level "jump"
if looking at one of the data signals"

# Some technical background!!
http://www.bb-elec.com/tech_articles/FAQ_rs232_connections_work.asp

Good hunting!

Tod


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