I'm having some trouble accessing the USB interface on my Carloop Basic. I've initialized and registered the Photon and upgraded its firmware, all over wifi. But when I attach it to a USB 2 or 3 port, I don't see the Carloop as a USB device. I've tried it natively on three Windows 10 devices with both USB 3 and 2, one Windows 7 computer with USB 2 and a Ubuntil 20.0.04L laptop with USB 2. In all cases, the Photon USB connection is not detected in or out of DFU mode. "dfu-util -l" sees nothing, nor does "particle usb list". USB drivers are installed. I have no trouble accessing the Photon using wifi ("particle list" works fine). Anybody out there run into this and found a solution? Hard to believe I have a defective USB interface on the Photon but suppose it's possible.