[CentOS] Need to test serial port connection
Phil Schaffner
P.R.Schaffner at IEEE.org
Thu Feb 26 11:14:06 UTC 2009
On Thu, 2009-02-26 at 10:17 +0000, Anne Wilson wrote:
> I recently bought a new UPS, and I'm attempting to use nut to monitor it.
> Following setup instructions everything seemed to go well until it came to
> testing the connection, which failed.
>
> There is just one serial connector on the computer, so I set it to
> monitor /dev/ttyS0. Either that is wrong, or communication is failing.
> I've been told to try minicom to monitor it, but I'm not familiar with
> minicom (or any similar app), so again, I may be wrong in the way I'm trying
> to use that. I was told that unconnecting the device, then re-connecting it
> should give me a raft of output to the terminal - I saw nothing.
>
> Could someone please give me idiot-level instructions on how to tell whether
> I'm connecting to the correct port, or whatever other information I need?
Anne,
Are you sure the cable is correct? I recall in the past having trouble
with an APC UPS that required an oddball RS-232 serial cable before it
would communicate. There were different variants available and only one
would work. Posting details of the brand/model of UPS involved might
get better help.
Phil
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