[Angstrom-devel] hostap, prism2.5 and channel12 & 13 in europe

[Stanislav Brabec]

Paul M wrote:

> Our wireless point at work is set to ch13 because of many other
> neighbouring access points crowded into 1,6 & 11 so all there was free
> was 13.
> 
> I can set my wireless card to any channel in range 1 to 11 but not to
> 12 or 13 - I get the error message
>    Error for wireless request  "Set Frequency" (8B04)
> 
> It's my understanding that the channel range *might* be compiled in to
> the driver, but I also guess it might be in a config file somewhere.

Yes, configuration is in the PDA section of the card firmware in its
flash memory (at least for most Prism 2.5 cards).

> If it's in the driver, is it possible to fix it please? If in a file,
> please let me know how I can tweak it.
> 
> I have also tried adding channels 12 & 13 to the kismet.conf file and
> kismet cannot find the AP.

It will not help. You have to modify PDA record of your card. It might
be possible to do by the card flashing tools. PDA record contains
important firmware configuration - transmit limits, channel range, MAC,
calibration values etc.

Be very careful - you may easily infringe local regulation law in your
county or make card unusable by flashing invalid values there. Never
flash values from another card: download it, modify only values you
exactly need to change, flash it back.

-- 
Stanislav Brabec
http://www.penguin.cz/~utx/zaurus