How to: Bind F13 to F24 keys on the G-keys (Logitech Gaming Keyboards)

logitech-bind-f13-f24.lua

-- How to use this script:
-- 1. Install the Logitech Gaming Software: http://support.logitech.com/en_us/software/lgs
-- 2. Launch it, and right click on your profile (the gear icon) and then click on "Scripts".
-- 3. Add the following code into the Script window, save it, and close it. Enjoy.
-- Now G1 is bound to F13, G2 to G14, ... G12 to F24.

function OnEvent(event, arg)

  -- OutputLogMessage("event = %s, arg = %s\n", event, arg) 

  fKey = {
    [1]  = 0x64, -- F13
    [2]  = 0x65, -- F14
    [3]  = 0x66, -- F15
    [4]  = 0x67, -- F16
    [5]  = 0x68, -- F17
    [6]  = 0x69, -- F18
    [7]  = 0x6A, -- F19
    [8]  = 0x6B, -- F20
    [9]  = 0x6C, -- F21
    [10] = 0x6D, -- F22
    [11] = 0x6E, -- F23
    [12] = 0x76  -- F24
  }

  if (event == "G_PRESSED") then
    PressKey(fKey[arg])
  end

  if (event == "G_RELEASED") then
    ReleaseKey(fKey[arg])
  end

end

This code won't work for mouse such as the G600. For those who want to implement this on a mouse, use the following new and greatly improved code:

-- How to use this script:
-- 1. Install the Logitech Gaming Software: http://support.logitech.com/en_us/software/lgs
-- 2. Launch it, and right click on your profile (the gear icon) and then click on "Scripts".
-- 3. Add the following code into the Script window, save it, and close it. Enjoy.
-- Now G9 on your G600 mouse is bound to F13, G10 to G14, ... G12 to F24.

function OnEvent(event, arg)
    -- Enable logging
    EnablePrimaryMouseButtonEvents(true)

    -- Table mapping mouse button numbers to F-key hex codes
    local fKeys = {
        [9] = 0x64,  -- F13
        [10] = 0x65, -- F14
        [11] = 0x66, -- F15
        [12] = 0x67, -- F16
        [13] = 0x68, -- F17
        [14] = 0x69, -- F18
        [15] = 0x6A, -- F19
        [16] = 0x6B, -- F20
        [17] = 0x6C, -- F21
        [18] = 0x6D, -- F22
        [19] = 0x6E, -- F23
        [20] = 0x76, -- F24
    }

    -- Debug function to get F-key name from hex code
    local function getFKeyName(hexCode)
        for i, code in pairs(fKeys) do
            if code == hexCode then
                return "F" .. (i + 4)  -- Adjusted to start from F13
            end
        end
        return "Unknown"
    end

    -- Function to handle key press and release
    local function handleKey(keyAction)
        if fKeys[arg] then
            local fKeyHex = fKeys[arg]
            local fKeyName = getFKeyName(fKeyHex)
            local actionName = keyAction == PressKey and "Pressing" or "Releasing"
            
            OutputLogMessage("Mouse button %d: %s %s (Hex: 0x%02X)\n", arg, actionName, fKeyName, fKeyHex)
            keyAction(fKeyHex)
        else
            OutputLogMessage("Unhandled mouse button: %d\n", arg)
        end
    end

    OutputLogMessage("Event: %s, Arg: %d\n", event, arg)

    if event == "MOUSE_BUTTON_PRESSED" then
        handleKey(PressKey)
    elseif event == "MOUSE_BUTTON_RELEASED" then
        handleKey(ReleaseKey)
    end
end

Old Logitech Keyboard and software user and this worked great, thank you. I then used the binds themselves to update the labels in the software too.