Issue:
PC does not detect the RAK811 LoRa Module V1.2
Setup:
Connect the RAK811 V1.2 direct to PC via USB cable but the PC was not able to detect the device.
Server:
Details:
Test 4 RAK811 V1.2 devices, all failed to be recognized by the PC. Also tried on a different computer also cannot detect. In addition, what is the function of the J2?
Welcome to RAK forum @pchan 
It is weird that all your RAK811 WisNode are not working. Since you tried to connect it already to two different PC, could it be the USB cable?
Regarding J2, it is a jumper option to directly power the RAK811 module. But that is shorted by default so it shouldn’t matter.
The schematic is here https://downloads.rakwireless.com/LoRa/WisNode/Hardware-Specification/WisNode-LoRa_Schematic.pdf