[Nut-upsuser] apc with rs232

Manuel Wolfshant wolfy at nobugconsulting.ro
Tue May 28 13:39:54 BST 2019

On 5/28/19 2:57 PM, 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
You could try looking for something like 

I would also try a different usb-rs232 adapter because yours behaves 
very strange. Are you sure it is not defective ?


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