Ytukyg

I am attempting to set the LED's of my RGB keyboard by sending HID packets to it via my Java program, with the Java HIDAPI wrapper found here.

I've been successful so far, but only on my Linux laptop. When I try run the code on Windows, I get an error, 'Invalid function', which I'm assuming is equivalent to the system Error 0x1, ERROR_INVALID_FUNCTION.

This sample example piece of code will not run on Windows, but will run on Linux. (When it is run from the terminal with 'sudo' prepended to the command.)

// Device is found prior to this...



if (device != null) {

    device.disableBlocking();



    // Initialise the buffer, and send it. PACKET_SIZE is 264

    byte buffer = new byte[PACKET_SIZE];

    for (int i = 0; i < PACKET_SIZE; i++) { buffer[i] = (byte)0x00; }



    // These bytes are required for it to actually change the LED's.

    buffer[0] = 0x07;

    buffer[1] = 0x0E;

    buffer[2] = 0x01;

    buffer[3] = 0x01;



    try {

        // Actually send the data.

        device.sendFeatureReport(buffer);

    }

    // Handle I/O exceptions

    catch (IOException e) {

        e.printStackTrace(); 

    }



    // Close the device.

    device.close();

}

else {

    System.err.println("DEVICE IS NULL");

}

I've tried running as administrator, no difference unfortunately...

If my question is not clear enough, let me know and I'll attempt to clarify it further.


Any help would be greatly appreciated! I'm getting desperate to find a solution to this! :)

Versions of OS's, if it matters:

Linux Ubuntu 18.04
Windows 8.1