I did wonder about the 5V connection. I was following the picture in the mbed USBdevice handbook. I have tried both methods of connection. It makes no difference to the result though I will change it.

How do I make changes to the HID library as necessary? There is no mention of that in the handbook.

Thank you for responding

The second picture above also seems wrong! Looks like you have Vcc wire of USB connected to Vout on mbed, that is even worse than connecting it to Vu! The Vcc wire should go to Vin, that is pin 2 on the LEFT side of the mbed module.

The vendor_id and product_id are parameters of the constructor that have default values, but can be overriden:

class USBMouse: public USBHID
{
    public:
        
        /**
        *   Constructor
        *
        * @param mouse_type Mouse type: ABS_MOUSE (absolute mouse) or REL_MOUSE (relative mouse) (default: REL_MOUSE)
        * @param vendor_id Your vendor_id (default: 0x1234)
        * @param product_id Your product_id (default: 0x0001)
        * @param product_release Your preoduct_release (default: 0x0001)
        *
        */
        USBMouse(MOUSE_TYPE mouse_type = REL_MOUSE, uint16_t vendor_id = 0x1234, uint16_t product_id = 0x0001, uint16_t product_release = 0x0001): 
            USBHID(0, 0, vendor_id, product_id, product_release, false)
            { 
                button = 0;
                this->mouse_type = mouse_type;
                connect();
            };

Wim...

The second picture is taken directly from the USBdevice section of the handbook! I think though the picture is suffering from a parallax error and the mbed in the picture with the connector is connected with the +5V pin connected to Vout...it is confusing though and I think that needs updating in the Handbook to pin 2. I am connected as you suggested with the +5V pin of my USB connector connected to pin 2 of the mBed.

It makes little difference as I have since found that when Windows detects my 'Unknown Device' the associated VID and PID number as 0000....which suggests that something else is wrong. I don't think I've fried my mBed as it works as a host USB device perfectly well and seems to program correctly. All the other programs I have uploaded have worked perfectly....

I have no idea why it keeps giving a 0000 for a VID and PID number though and there does not seem to be any mention of it anywhere else. Thanks for pointing me towards where the VID and PID number are hard coded though that is useful information.

If you or anyone has any idea why my VID and PID number are always 0000 that would be helpful.

Cheers

Wim...I have it working correctly now. Thank you for your assistance. The VID and PID number were set to 0000 in the library and I had not updated it correctly....Found it now, Very much appreciated!

Alex