EM7330 Hardware ID issue

Hi,
i have a EM7330,the DM port and NMEA port can be detected by device manager normally,but have no AT command response.The hardware ID is:USB\Vid_1199&Pid_9041&MI_03.
for good sample,the hardware ID is:USB\Vid_1199&Pid_9041&Rev_0006&MI_03.

What’s the “Rev_0006” here?
What’s the possible rootcause for “Rev_0006” lost?
Can i modify the hardware ID?

Can you help on this? Thanks! :slight_smile:

Hi,
Are you able to see the AT command port in the device manager?

Regards,
Rex

No AT command port presented,
only DM port and NMEA port be detected.

Can you help me??
Any suggestion?
Thx