[Nut-upsuser] apc with rs232

Julian H. Stacey jhs at berklix.com
Tue May 28 13:39:41 BST 2019

grumpy at mailfence.com wrote:
> a friend gave me an old apc smart-ups 1250
> it has a rs232 interface but i have no pc with a rs232 port
> i attempted to use a rs232 to usb adapter but the ups goes nuts
> i connected the ups to batteries and verified it was working properly
> when i plug the usb cable into the pc the ups shuts down
> when i attempt to turn it on it beeps twice and shuts down
> this all occurs before i start the nut software
> other than give up or buy a new ups, any suggestions

Far cheaper than a new UPS would be a 2nd hand old small PC with ethernet;
then run NUT over ethernet to modern PC
You can get old PCs that are book sized. & libretto sized too, etc.

Julian Stacey, Consultant Systems Engineer, BSD Linux Unix, Munich Aachen Kent
 Brexit ref. stole votes from 700,000 Brits in EU; 1.9 M young, more remainers
 had no vote; 1.3 M old, mostly leavers now dead.  Lies part paid by illegal
 foreign funds. In-sufficient fines & control.  http://stolenvotes.uk

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