Setting the USB CDC-ACM Serial Number at Runtime

[Andrea Verdecchia]

If I have an application where I have implemented USB CDC-ACM, how can I set the serial number seen by the PC when I connect my device? Is it possible to set it at runtime?

[Kenneth]

Hi,

Normally the serial number is set on boot, e.g.: 

USBD_DESC_SERIAL_NUMBER_DEFINE(sample_sn); 
    err = usbd_add_descriptor(&sample_usbd, &sample_sn);
    if (err) {
        LOG_ERR("Failed to initialize SN descriptor (%d)", err);
        return NULL;
    }

I guess it's potentially possible to manipulate it if you want to.

Kenneth