Thank you for your work Piotr! I have created several years ago a PC based data logger on an embedded system. I used a MAX3421 usb IC, which was connected to MCU via SPI and on the PC side libusb was used to receive the data. I can achieved higher throughput than serial/usb converters. Unfortunately there was no graphical visualisation.
Do you think it is possible using your GUI (with the needed modifications) to work with this, or similar USB based data acquisition device?