[Nut-upsuser] can't make mustek powermust 600usb work

Alex Girchenko gsmdib at gmail.com
Mon Jun 11 00:46:55 UTC 2007

Thanks. There's definitely smth I've got to learn yet :).
Trying to run the command you provided would return an error saying it
can't open port.
crw-rw---- 1 root dialout 4, 64 2007-06-11 01:55 /dev/ttyS0
chmod 777 would sort the issue out, but I'm still curious why isn't
'rw' for a program running under a root account enough? I'd be very
thankful if you could give a hint on this.
Anyways, thanks for your help!

On 6/11/07, Charles Lepple <clepple at gmail.com> wrote:
> On 6/10/07, Alex Girchenko <gsmdib at gmail.com> wrote:
> > Disclaimer: I've setup APC UPS monitoring and it works...
> > ... but when it comes to mustek powermust 600usb (connected via
> > com-port), I can't make it work.
> Not sure how applicable this is to this particular UPS, but are there
> different cables for "dumb signalling" (contact-closure) versus "smart
> signalling"?
> Also, what sort of messages do you get if you run:
>    /lib/nut/megatec -a mustek -DDD
> --
> - Charles Lepple

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