Has anyone successfully interfaced mPCIE (usb2.0) interface to communicate with cellular modem like Quectel EC 25E?
I am using the dev compatible with the module.
If I solder a USB Keyboard to D+, D-, it detects but errors out -71 code
For Quectel EC 25E connected via mPCIE, it does not detect at all. Please suggest options to troubleshoot this further.
Drivers are loaded.