Not recognised via USB Server

[twazerty]

My RTL SDR usb sticks (3x) are positioned relatively far away from my computer. USB hubs and longer cable are giving problems. So I tried USB via LAN, but it didn't work. I tried:

1. USB Redirector Server on Linux and Windows client. Was able to install the drivers via Zadig but SDR# didn't recognise the device.
2. A hardware device Sharkoon USB LANPORT 400. Same problem, my computer recognizes the stick, can install the driver via Zadig, but no luck with SDR#.

The I suspected SDR#, so I debugged the code and concluded that the problem is within rtlsdr.dll / libusb-1.0.dll. I tested it with rtl_test.exe to rule out SDR#. rtl_test.exe also didn't recognise the usb sticks.

Tested it with the E4000 device. Device is recognised as VID_0CCD&PID_00D7 via both the sharkoon and usb redirector.

I am also experiencing the same problem when I use the rtl device via my NEC USB3.0 hub.

It would be nice if this problem could be fixed so I can use a long lan cable instead of usb cables.

[steve-m]

librtlsdr depends on libusb, which in turn depends on the systems USB implementation. You obviously need a reliable and working physical USB connection for anything on top to work at all, so this issue is not directly related to librtlsdr.