Hello narcotico,
you will find the configfile in
%userprofile%\AppData\Roaming\XBMC\userdata\addon_data\script.dfatmo\settings.xml
Edit the value for "driver_param" to
COM3&speed:256000&proto:255|0|0|15|Rc|Gc|Bc|Rl|Gl|Bl|Rr|Gr|Br|Rt|Gt|Bt|Rb|Gb|Bb
In this string you must replace "COM3" with your COM Port.
Here is my complete config:
<settings>
<setting id="analyze_rate" value="35" />
<setting id="analyze_size" value="1" />
<setting id="bottom" value="1" />
<setting id="bottom_left" value="true" />
<setting id="bottom_right" value="true" />
<setting id="brightness" value="100" />
<setting id="center" value="false" />
<setting id="custom_driver" value="" />
<setting id="darkness_limit" value="1" />
<setting id="driver" value="serial" />
<setting id="driver_param" value="COM3&speed:38400&proto:255|0|0|15|Rc|Gc|Bc|Rl|Gl|Bl|Rr|Gr|Br|Rt|Gt|Bt|Rb|Gb|Bb" />
<setting id="edge_weighting" value="60" />
<setting id="enabled" value="true" />
<setting id="filter" value="2" />
<setting id="filter_delay" value="0" />
<setting id="filter_length" value="500" />
<setting id="filter_smoothness" value="50" />
<setting id="filter_threshold" value="40" />
<setting id="gamma" value="10" />
<setting id="hue_threshold" value="93" />
<setting id="hue_win_size" value="3" />
<setting id="left" value="1" />
<setting id="log_level" value="1" />
<setting id="output_rate" value="20" />
<setting id="overscan" value="0" />
<setting id="right" value="1" />
<setting id="sat_win_size" value="3" />
<setting id="top" value="1" />
<setting id="top_left" value="true" />
<setting id="top_right" value="true" />
<setting id="uniform_brightness" value="false" />
<setting id="wc_blue" value="255" />
<setting id="wc_green" value="255" />
<setting id="wc_red" value="255" />
<setting id="weight_limit" value="12" />
</settings>
I have found a german manual here.
http://ca.rstenpresser.de/index.php/xbmc-dfatmo.html
Hope this will help.
Data1706