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UE3 Home > Input / Output > Logitech Gaming LED SDK for Unreal

Logitech Gaming LED SDK for Unreal


The Logitech Gaming LED SDK enables applications such as games to control the backlight LEDs on supported Logitech gaming mice and keyboards.

It can be easily integrated in a UDK game by using DLLBind.

Find the SDK attached as a file at the bottom of this page.

Please refer to the Logitech SDK’s Doc\LogitechGamingLEDSDK.pdf for details on the SDK’s functionality.

For questions/comments, email cjuncker@logitech.com, or lbyrne@logitech.com.

Making the LED SDK work in your UDK game

The following steps show how to make the Logitech SDK work with “UDKGame” that comes as part of the UDK download. Please adapt the steps to your game for things to work.



class TestDLLGameInfo extends GameInfo;



class TestDLLPlayerController extends PlayerController

dllimport final function bool LogiLedInit();
dllimport final function bool LogiLedSaveCurrentLighting(int deviceType);
dllimport final function bool LogiLedSetLighting(int deviceType, int redPercentage, int greenPercentage, int bluePercentage);
dllimport final function bool LogiLedRestoreLighting(int deviceType);
dllimport final function LogiLedShutdown();

exec function LogiInit()
   local bool ret;
   ret = LogiLedInit();

   say("LogiLedInit return is: " $ret);

exec function LogiSaveCurrentLighting(int deviceType)
   local bool ret;
   ret = LogiLedSaveCurrentLighting(deviceType);

   say("LogiLedSaveCurrentLighting return is: " $ret);

exec function LogiSetLighting(int deviceType, int redPercentage, int greenPercentage, int bluePercentage)
   local bool ret;
   ret = LogiLedSetLighting(deviceType, redPercentage, greenPercentage, bluePercentage);

   say("LogiLedSetLighting return is: " $ret);

exec function LogiRestoreLighting(int deviceType)
   local bool ret;
   ret = LogiLedRestoreLighting(deviceType);

   say("LogiLedRestoreLighting return is: " $ret);

exec function LogiShutdown()

   say("LogiLedShutdown done");

  • Copy Logitech SDK’s Lib\x86\ LogitechLed.dll to UDK’s Binaries\Win32\UserCode
  • Copy Logitech SDK’s Lib\x64\ LogitechLed.dll to UDK’s Binaries\Win64\UserCode
  • Open UDK’s UDKGame\Config\ DefaultEngineUDK.ini file for editing
    • Search for: ModEditPackages=MyMod
    • Remove the ; at the beginning of the line
  • Launch UDK’s Binaries/UnrealFrontend.exe
    • Do: Script->Full recompile

Calling Logitech SDK’s functions from within the game

Launch game the following way:

  • Binaries\Win32\UDK.exe dm-deck?game=MyMod.TestDLLGameInfo

Once the game is running, open the console (hit the ~ key), and type: LogiInit, and then hit key. You should see the "LogiLedInit return is: TRUE” message.

Then use the other commands as defined in the Unreal Script file:

  • LogiSetLighting
  • LogiSaveCurrentLighting
  • LogiRestoreLighting
  • LogiShutdown