On Jan 20, 2015, at 9:32 AM, Maurizio Iacaruso <[email protected]> wrote:
> Setup that I was on mind is a little different, but I think your setup works > well. > In my setup the HUB is connected directly to the UPS, then the cables go to > raspberry and device. > In your setup the HUB is connected directly to the raspberry, then the cables > go to UPS and Device. well, actually, I was describing a scenario with three standard A->B cables. In my mind, the presence of an A-to-A cable indicates a problem in the design :-) Wait, are you just trying to use the UPS for 5VDC power over USB for the other device? The diagram I drew shows how to connect the UPS to the RPi for monitoring, through the hub. Other configurations are possible if you don't need to monitor the UPS. > It’s Ok? > > In both configurations I need the same things: Male B->female A adaptor, HUB > and 2 male A-> male A cables. > The male A- male A cables have any peculiarity? Can I buy it or make it > myself without problems? http://en.wikipedia.org/wiki/USB#Cable_plugs_.28USB_1.x.2F2.0.29 The "non-standard" designation for the A-to-A cable means that it can't be used for normal USB communications, but it might work for supplying 5VDC. > Thanks a lot for advice. > > > > Da: Charles Lepple [mailto:[email protected]] > Inviato: martedì 20 gennaio 2015 14:23 > A: Maurizio Iacaruso > Cc: NUT List > Oggetto: Re: [Nut-upsuser] R: NUT and relay on USB > > On Jan 20, 2015, at 7:43 AM, Maurizio Iacaruso <[email protected]> > wrote: > > > I connect USB A (female) to USB B (male) adapter -> HUB -> 2 USB wires male > to male, one to raspberry and another one to my device. > > I'm not sure I understand your setup. > > This should work, using standard USB cables: > > <- upstream downstream -> > <- host device -> > > A->B A->B > > Raspberry Pi -> hub -> UPS > | > \---> device > > The problem is that there is no equivalent of a "crossover cable" or > "null-model adapter" for USB. (I am ignoring USB OTG for the moment, since > you want the RPi to talk to the UPS). There are many USB adapter cables out > there that will only work for supplying power, or only with point-to-point > USB OTG. > > -- > Charles Lepple > clepple@gmail > > > > _______________________________________________ > Nut-upsuser mailing list > [email protected] > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser -- Charles Lepple A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail?
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