[Gllug] RS232 serial adaptor

[Alain Williams]

On Wed, Jan 24, 2007 at 07:35:21PM +0000, Chris Jones wrote:
> Hi
> 
> Alain Williams wrote:
> > A quick google shows that there are USB connected RS232 adaptors about, but I
> > can't evaluate one over the other.
> 
> If you mean straight one usb connector => one RS232 port, you may want
> to be careful as they will be created on the host machine in the order
> they identify with the USB stack, which is not necessarily the same as
> the order they are plugged in, so if a given device has to appear on a
> consistent tty device, you will get stuck.
> If the adaptors are sane they will each have a unique serial number and
> you can use udev rules to ensure consistent naming, but (at least) the
> one I use to give my laptop a serial port does not have a serial number :(

No: I want to have a dozen (or 16) ports where I know the device mapping,
ie that /dev/ttyXXXXX corresponds to a certain printer.

-- 
Alain Williams
Linux Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer.
+44 (0) 787 668 0256  http://www.phcomp.co.uk/
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