[Xastir] USB dongle suggestion...

[Richard, N6NKO]

William,

Thank you for the effort.

Hopefully this will put this issue to sleep. We all have dealt with this 
sequencing issue.

This will help others, not just us, with the dongle sequencing issue.

73 from 807,

Richard, N6NKO


William Gery wrote:
> USB to serial adapters have unique device ids ( serial numbers ) 
> The serial number can be found in the file /proc/bus/usb/devices 
> Since I have several,  I connected them one at a time and copied down
> the number. 
>
> Then a rule was created for each which creates symbolic links when the
> USB adapters is plugged in. The software using the interface is
> configured to use the alias. Example for xastir I have three TNC/s
> connected.   /dev/ttytnc0, /dev/ttytnc1, and  /dev/ttytnc2 which
> correspond to device 0, device 1 and device 2 for xastir interfaces. In
> this way the actual /dev/ttyUSB does not matter since the software used
> the symbolic link dev which is based on the USB adapters serial number.
>      
> Six of the 7 usb adapter shown below are from the same manufacturer.
>  
> Hope this helps
>
> sample 25-usbserial.rules in /etc/udev/rules.d Fedora core 4 and 5
>
>
> #KERNEL="tty[A-Z]*", SYSFS{serial}="FTCCGJQ8", SYMLINK="ttyT4"
> MODE="0666"
> KERNEL="tty[A-Z]*", SYSFS{serial}="FTCCGJQ8", SYMLINK="tty706",
> MODE="0666"
> KERNEL="tty[A-Z]*", SYSFS{serial}="FTCAA03O", SYMLINK="ttyWX",
> MODE="0666"
> KERNEL="tty[A-Z]*", SYSFS{serial}="FTCBXBA8", SYMLINK="ttytnc2",
> MODE="0666"
> KERNEL="tty[A-Z]*", SYSFS{serial}="FTC9S453", SYMLINK="ttytnc1",
> MODE="0666"
> KERNEL="tty[A-Z]*", SYSFS{serial}="FTCBX94P", SYMLINK="ttytnc0",
> MODE="0666"
> KERNEL=="tty[A-Z]*", SYSFS{serial}=="ftCCDAR5", SYMLINK="ttypsk",
> MODE="0666"
> KERNEL="tty[A-Z]*", DRIVER="pl2303", SYMLINK="tty756", MODE="0666"
>
> On Sat, 2006-09-23 at 08:43 -0500, Richard, N6NKO wrote:
>   
>> There was a previous discussion on this topic concerning the issues of 
>> USB/serial adapter port assignments and hotplug.
>>
>> I may have a solution to the assignment issue. If you want to have 
>> several port adapters on USB but always have them assigned to particular 
>> ports, then buy a couple of adapters from different manufacturers so 
>> each one is unique.  That should make the USB id unique also. Now write 
>> a hotplug script that when it sees a particular ID come online to assign 
>> the adapter to a specific /dev/? port.
>>
>> 73 from 807,
>>
>> Richard, N6NKO
>>
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