[ath9k-devel] How to prepare a 802.11 channel map with energy using ATH9K

[karl at aspodata.se <karl@aspodata.se>]

Sandeep:
>?This is regarding?generating a 802.11 channel map with energy at
> periodic intervals. That means from a WiFi CLient I would like to
> query and retrieve the energy detected on each of the 802.11
> channel from the WiFi AP and prepare a map of it. This is
> simillar/same as results available from a Site survey tool loke
> "Fluxe based WiFi Air Check meter".

That functionality would be welcome. A review about Fluke's
air magnet is available at:

http://www.enterprisenetworkingplanet.com/netsysm/article.php/3652756/AirMagnets-Spectrum-Analyzer-20.htm

> Can anyone help me with the method and APIs available for the same?

 There are patches at e.g.:
http://article.gmane.org/gmane.linux.kernel.wireless.general/102332/match=spectral+scan

 The last one I have seen is
http://article.gmane.org/gmane.linux.kernel.wireless.general/117038/match=spectral+scan

 The wireless playground seem to be:
http://wireless.kernel.org/en/developers/Documentation/git-guide
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git

 The Atheros 92xx/93xx seems to support spectral scan:
http://wireless.kernel.org/en/users/Drivers/ath9k/spectral_scan/

 To enable it look at:
http://wireless.kernel.org/en/users/Drivers/ath9k/debug

 Programs to test spectral scan with:
https://github.com/simonwunderlich/FFT_eval/
https://github.com/LorenzoBianconi/ath_spectral

 I am testing this with the kernel at:
http://turkos.aspodata.se/tmp/linux-image-3.12.8-i2-rt11_1_i386.deb

 and using the preocedure in FFT_eval/scan.sh I just got my first scan:
http://turkos.aspodata.se/tmp/ath9k_first_scan

I'm using a TP-Link TL-WDN4800 pcie card for testing.

Regards,
/Karl Hammar

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