Re: Problem with udev device identification

2011-04-23 Thread Camaleón 
El 2011-04-22 a las 17:04 -0400, Sebastian Lara escribió:

(resending to the list)

 El viernes 22 de abril de 2011, Camaleón
 
  (...)
 
  There must be a string that uniquely identifies the converters despite
  the device being attached on them... for instance, how about the serial
  number? This value shouldn't be shared between the tree devices at all :-?
 
 Yes. I can even change some serial values but we need to replicate
 this in several machines.

And what's the problem, exactly? :-?

You should be able to:

1/ Globally identify the converters by some attribute shared between 
all of them (such as vendor, device...).

2/ Uniquely identify converters by some attribute not being shared 
between all of them (such as serial number).

Greetings,

-- 
Camaleón 


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Re: Problem with udev device identification

2011-04-22 Thread Camaleón 
On Wed, 20 Apr 2011 17:21:41 -0400, Sebastian Lara wrote:

 I have three different serial devices connected to three usb-serial
 converters (FTDI USB-RS232). If I connect them, I get the generic device
 names /dev/ttyUSBx as expected. When I try to write some udev rules,
 udevadm shows me the same output for the three devices except in some
 device serial id attributes.
 
 Those serial id's will change on every device so if I use a different
 usb-serial converter, my rules won't work anymore. So, I need a way to
 communicate with the specific device connected to the serial converters
 and identify it by its response.

(...)

There must be a string that uniquely identifies the converters despite 
the device being attached on them... for instance, how about the serial 
number? This value shouldn't be shared between the tree devices at all :-?

Greetings,

-- 
Camaleón


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