Unable to access (perform read write operation) from DM port

IoT Modules MC/EM Series
1

I am using MC7304 EVM board. When i connect the EVM to a windows based machine it is showing 3 COM ports availabe for the EVM.In the Modem COM i am able to access the AT commands in rest of the 2 COM i am unable to access.Can you please help me how to access these ports

With regards
P S Reddy :confused:

2

Hi,
Only one port is available for AT commands, that is AT port.
other ports available are NMEA and DM which are used for specific purposes. Like NMEA port for getting NMEA frames and DM port for obtaining the logs.

-Alex

3

OK Thanks for info…
can you please let me know how take logs from DM port
how to enable DM port

4

Hi,
Normally DM port will be enabled automatically. what is the output of the command AT!UDUSBCOMP?
You can see the port number from ‘device manager -> ports’

To take logs, you need specific software like Sierra wireless SwiLogPlus. You can contact your reseller/distributor to know more.

-Alex

5

HI

AT!UDUSBCOMP=?
1 - DM AT
23 - DM NMEA MODEM RMNET1 RMNET2 RMNET3 AUDIO
24 - DM NMEA MODEM RMNET1 RMNET2 RMNET3
25 - DM NMEA MODEM AT AUDIO

OK
AT!UDUSBCOMP??
!UDUSBCOMP: 23

In Device manager am able to see the port numbers and interfaces please find the attached device Manager screen

7a941a8a23078189f7516968ddbc67273583312d.png818×860 43.8 KB

6

So for your module, DM port is set to COM3. You can use this to COM to get the logs.

-Alex

7

Hi Rex_Alex,

In windows If want take logs I can take by using SWI log plus tools .If i want to take the logs in Linux what should I do ?
By default no information is displayed on DM port is there any AT command for displaying diagnostic information.

With Regards
P S Reddy :neutral_face: