Hi, USB driver version: 11.5.0.0 Windows OS: Windows 2018 R2 64 bit Module: SL8082BTAR Issue: USB driver installed successfully, “Sierra Wireless AT Command Port (UMTS) (COM7)” was shown. But after 5 minutes, it changed to “Unknown Device”. Have tried on another PC, facing the same problem Doe…

SL8082BTAR USB driver for Windows 2018 R2 64 bit

ms2008 March 31, 2017, 11:21am 2

We discovered the root cause – it is power issue.

When there is no power, COM port will disappear.