BG951A: Cannot enable EMUX if usb is enabled

IoT Modules LPWA Module
1

My current firmware is: BG951AGLAAR02A01_JP
Once usb is enabled by AT+QCFG=“usb”,1
I got error when enable EMUX:
AT+EMUX=1,115200,0

ERROR

ps. BG96 does not has such issue with cmux.

2

Hi @axel.lin

Are you means when usb is disabled, the EMUX working as expected? or always returned error?

3

When usb is disabled (AT+QCFG=“usb”,0), the EMUX is working.