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This issue is generally due to the axis of your device being defined as a digital on/off axis in the windows registry. See the following FAQ entry: That is specifically for Saitek devices but applies to all - just use the correct VID and PID numbers for your device,

Hi John, As I mentioned, I wouldn’t call myself a "coder," so I often rely on ChatGPT for help. But when I get stuck, I turn to the forum for deeper insights. Thanks to your hints and guidance, I now have a working script again. I really appreciate your help—thank you so much! Best regards, Isak Here is the working lua script: dev = com.open("COM6", 115200, 0) -- Open COM port with baud rate 115200 ipc.display("Lua script is running...", 3) function processInput() local datastring, length = com.read(dev, 256) if length then ipc.log("Raw data received: '" .. datastring .. "' [" .. length .. "]") if datastring:match("^NAV1SB") then local frequencyStr = datastring:match("NAV1SB%s*(%d+%.%d+)") -- Extracts the frequency if frequencyStr then ipc.log("Extracted frequency: " .. frequencyStr) -- Debug log local bcdValue = convertToBCD(frequencyStr) ipc.log("BCD Converted: " .. string.format("0x%X", bcdValue)) -- Debug log ipc.writeUD(0x311E, bcdValue) -- Send to FSUIPC ipc.display("NAV1 standby set: " .. frequencyStr, 3) ipc.log("NAV1 standby frequency set to BCD: " .. string.format("0x%X", bcdValue)) else ipc.log("Error: Failed to extract frequency!") end end end end -- Convert frequency to BCD (e.g., "113.45" → 0x1345) function convertToBCD(freq) local cleanFreq = freq:gsub("%.", "") -- Remove decimal (e.g., "109.2" → "0920") local decimalNumber = tonumber(cleanFreq) -- Convert to number if not decimalNumber then return 0 end -- Return 0 if conversion fails local bcd = 0 local shift = 0 -- Convert each decimal digit to BCD format while decimalNumber > 0 do local digit = decimalNumber % 10 bcd = bcd + (digit * (16 ^ shift)) -- Use base 16 shift instead of bitwise left shift decimalNumber = math.floor(decimalNumber / 10) shift = shift + 1 end return bcd end while true do processInput() ipc.sleep(100) end

okay, found the issue, @Paul Henty program did not have time to start the service 🙂 wil clean up my code and fix the code to read it here

Hello again, that works very well Thank you very much !! Can be closed. Matthias

I've tried this here using the Key_Press_and_Hold control. It may not do what you're expecting. It doesn't repeat the key until you call the release command. So you don't get the action repeating. You can try it for yourself and see if it does what you're expecting... Just paste this into your code and call. sendKeyHoldToFS - holds the key for the specified HoldTime (in milliseconds) then releases it. sendKeyDownToFS - presses the key down but does not release it. snedKeyUpToFS - releases the key. private void sendKeyHoldToFS(Keys Key, SendModifierKeys Modifiers, int HoldTime) { // First make sure FSX has the focus SendControlToFS(FSUIPCControl.Key_focus_restore, 0); // Wait for focus change Thread.Sleep(150); // Send the key down SendControlToFS(FSUIPCControl.Key_Press_and_Hold, (int)Key + ((int)Modifiers * 256)); // Wait Thread.Sleep(HoldTime); // send the key up SendControlToFS(FSUIPCControl.Key_Release, (int)Key + ((int)Modifiers * 256)); } private void sendKeyDownToFS(Keys Key, SendModifierKeys Modifiers, int HoldTime) { // First make sure FSX has the focus SendControlToFS(FSUIPCControl.Key_focus_restore, 0); // Wait for focus change Thread.Sleep(150); // Send the key down SendControlToFS(FSUIPCControl.Key_Press_and_Hold, (int)Key + ((int)Modifiers * 256)); } private void sendKeyUpToFS(Keys Key, SendModifierKeys Modifiers, int HoldTime) { // First make sure FSX has the focus SendControlToFS(FSUIPCControl.Key_focus_restore, 0); // Wait for focus change Thread.Sleep(150); // Send the key down SendControlToFS(FSUIPCControl.Key_Release, (int)Key + ((int)Modifiers * 256)); } Paul

I have added the LIVERY NAME simvar to offset 0x2480 (128 bytes) in the attached version if you would like to try it. This offset will only b populated in MSFS2024 and not in MSFS2020. John FSUIPC7.exe