AW: [Nut-upsuser] Re: [Nut-upsdev] megatec driver and
philipp.leusmann at rwth-aachen.de
Thu Nov 2 09:59:00 CET 2006
Actually it is as easy as that. I just got a USB-to-serial-converter for my
All I had to do was compiling the proper kernel-module for my converter and
then use /dev/ttyUSB0
> -----Ursprüngliche Nachricht-----
> Von: nut-upsuser-bounces+philipp.leusmann=rwth-
> aachen.de at lists.alioth.debian.org [mailto:nut-upsuser-
> bounces+philipp.leusmann=rwth-aachen.de at lists.alioth.debian.org] Im
> Auftrag von Peter Selinger
> Gesendet: Donnerstag, 2. November 2006 03:54
> An: Carlos Rodrigues
> Cc: nut-upsdev at lists.alioth.debian.org; nut-
> upsuser at lists.alioth.debian.org
> Betreff: [Nut-upsuser] Re: [Nut-upsdev] megatec driver and usb-to-
> Hi Carlos,
> as far as I know, there is a standard "serial over USB" interface. I
> think the USB specification discourages such interfaces.
> All the "serial over USB" devices that I have seen have used a
> manufacturer-specific hack. So connecting to a USB device should not
> usually be as simple as connecting to /dev/something.
> If I am wrong, somebody please correct me! -- Peter
> Carlos Rodrigues wrote:
> > Hi all,
> > Currently, the "megatec" driver only supports UPSes which have a
> > serial (RS232) interface.
> > However, I'm under the impression that most of the models that speak
> > the megatec protocol, and have an USB interface, just have a standard
> > serial-to-USB converter inside. This being the case, there should be a
> > "/dev/ttyUSBx" device which the megatec driver could use just as if it
> > were talking to the UPS over an RS232 cable.
> > But... either this isn't the case, or these converters aren't
> > recognized by the kernel's "usbserial" driver as such, and all that
> > needs to be done is just convice the kernel to see the converter.
> > This is something that I would like to know (even if just to be able
> > to point people who email me about not having serial ports available,
> > or with models that lack a serial interface, in the right direction).
> > So, if someone out there with an UPS supported by the "megatec" driver
> > (and with an USB interface) wants to try this, I would appreciate the
> > feedback...
> > Here are the general steps:
> > 1. Connect the UPS using the USB cable (AFAIK, the USB and serial
> > cables can't be connected simultaneously);
> > 2. Run "lsusb -v" to find the vendorID and productID for the UPS;
> > 3. "rmmod usbserial" if the module happens to be loaded already;
> > 4. Load the module again with "modprobe usbserial vendor=0x...
> > product=0x..." (or add this to your "/etc/modprobe.conf" file as
> > "options usbserial vendor=0x... product=0x...");
> > 5 .If there is now a "/dev/ttyUSBx" device available, configure
> > "megatec" to use it.
> > My Mustek PowerMust 600 doesn't have an USB interface, so I can't test
> > this myself, and I have no idea if this works with some models, all
> > models, or no models (*)...
> > Anyone interested?
> > (*) Or what happens if the usbserial driver gains successful control
> > of a device that happens to be something else entirely not a
> > usb-to-serial converter... Although I really doubt something bad would
> > happen, I'm just covering my ass here... :)
> > --
> > Carlos Rodrigues
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