EM9190: No response for AT!USBCOMP? command

IoT Modules MC/EM Series
1

Hi there,

We are using EM9190 module with the MPBL driver.
We were able to get responses from the module for the commands like AT, AT+cpin?, AT!ENTERCND=“dummy_pwd”

But we are not getting any response for the AT!USBCOMP? command, what could be the issue?

Thanks
Monisha

2

How about at!usbcomp=?

How about other command like at!gstatus?

Which firmware are you using?

3

No response for both the at!usbcomp=? and at!gtatus? commands.
I tried getting the firmware version using both at+gmr and ati command, getting no reponse either.

Thanks,
Monisha

4

Can you test in another usb port /dev/ttyUSB1?

Can you test in windows pc?

5

Both windows and Linux are unable to detect the module.
But the module is getting detected in our custom board in /dev/ttyUSB1 port. We were sending AT commands from our application running in custom board.

p.s we are using m2. to usb adapter with the module.

6

there should be two USB ports enumerated, /dev/ttyUSB0 and /dev/ttyUSB1.

you might also see this topic:

7

hey @jyijyi

Thanks for that input. Now my module gets detected in Windows after PCIe_DIS signal is pulled up in M2. adapter.
Referred this : EM9191 module not recognized on Linux/Win10 host computer - #5 by stefanbruens

I’m able to get the firmware version and the output for the commands I mentioned earlier.

And yes, two USB ports were enumerated.