WHAT IS THIS

Simple tool to visualise real-time spectral scan data from ath9k on Linux.

After playing with FFT_eval I decided to do something a little different.

REQUIREMENTS

• ath9k and HW w/ spectral scan support
• gnuplot (with wxt terminal support, install gnuplot-x11 on debian derivatives)
• make, gcc
• POSIX-shell
• optional: ssh (in case you use remote machine to gather spectral scan)
• optional: patched kernel and iw for scan chan-time parameter (http://thread.gmane.org/gmane.linux.kernel.wireless.general/111255 http://thread.gmane.org/gmane.linux.kernel.wireless.general/111251])

CONFIG

Before use you need to adjust the ./ss script. Read the comments in the file for more information.

The current ./ss script uses ssh to connect and issue commands to gather spectral scan data. This is because I have ath9k hooked up on a laptop but interact with my PC only. If you have ath9k hooked up locally you can skip the ssh dialing part and update interface/phy names only if necessary.

USAGE

make
export PATH="$PWD:$PATH"
./ss

KNOWN ISSUES

My gnuplot freezes after couple of minutes of running. No CPU usage. Just stops responding.

CREDITS

The formula has been taken from FFT_eval by Simon Wunderlich:

https://github.com/simonwunderlich/FFT_eval

Inspired by:

http://blog.altermundi.net/article/playing-with-ath9k-spectral-scan/