Writing to HID keyboard works on Linux but not on Windows











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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...



Any help would be greatly appreciated :)




Versions of OS's, if it matters:

Linux Ubuntu 18.04
Windows 8.1






java linux windows hid hidapi







share|improve this question




























    up vote
    1
    down vote

    favorite












    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...



    Any help would be greatly appreciated :)




    Versions of OS's, if it matters:

    Linux Ubuntu 18.04
    Windows 8.1






    java linux windows hid hidapi







    share|improve this question


























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      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...



      Any help would be greatly appreciated :)




      Versions of OS's, if it matters:

      Linux Ubuntu 18.04
      Windows 8.1






      java linux windows hid hidapi







      share|improve this question















      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...



      Any help would be greatly appreciated :)




      Versions of OS's, if it matters:

      Linux Ubuntu 18.04
      Windows 8.1






      java linux windows hid hidapi




      java linux windows hid hidapi






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 7 hours ago

























      asked 10 hours ago









      Michael

      254




      254





























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