Quectel eg25-g with openwrt constantly restarts in MBIM mode

IoT Modules LTE Standard Module
1

Hi,

I have installed my EG25-G modem in my openwrt router but I am experiencing constant restart after approx 1 minute. I get a new IP adres every time after restart. I have the modem setup in MBIM mode.

I tried it with another EG25-G modem but getting the same problem.

How can I solve this issue, is there a setting what I can change or do I have to do anything else?

2

Is there someone who can help me solving this issue?

3

Can you try the quectel-CM in the OpenWrt?
quectel-CM can easily tell us why it failed.

4

Hi Bean.Wang,

Thnx for the reply, can you tell me how to install Quectel-cm on openwrt?

5

Does this happen in other modes - ECM, QMI ?
Does this happen with or without traffic being sent through the modem?
Is the modem getting enough power? How exactly it is powered?
What power supply voltage you see on the modem or adapter? You can also check with AT+CBC

6

Hi jfrog,

Great questions, thanks for that…

1.I only tested the MBIM mode, I have to test if other modes perform better but firstly I would ask this forum what to do.
2. it happens constantly when I ping devices or try to surf on internet (or just do nothing).
3. I have the Mini PCIe version which is connected to a board with usb and cooling. It is connected via USB to my raspberry pi4b.
4. Have to check the command when I get home.

7

see if it has a separate power connector and connect it to the suitable external source

8

Quectel provide the the source code of the QConnectManager.
I find someone push it on the github.

Please check whether there is any other process that open the /dev/cdc-wdm0.

lsof | grep cdc-wdm

And please check whether there is usb disconnect from the kernel log.

9

Found the problem. I had installed a crontab script discribed in one of the tutorials which resulted in a time out. Disabling this solved this problem.

thnx for the help and great to see everything is working again.