Firmware for EC25-EUX and issue with repetitively 'AT' seen in /dev/ttyUSB2

IoT Modules LTE Standard Module
1

Hello, I have alot of EC25-EUX modems, for which I need the latest firmware. The current one I have installed is:EC25EUXGAR08A15M1G_20.200.20.200
Can I have the latest version send to my mail please (even if it is the same as mine).
I am having strange issues with all my modems, where sometimes /dev/ttyUSB2 starts to print “AT” command non-stop and /dev/ttyUSB3 is the only interface I can send commands to. No restart or reset fixes this. But sometimes it does get “fixed”.
My mail is na@twinstarsoft.com

2

Is it Ubuntu OS? Have you disabled the ModemManager.

3

I’ve sent the latest firmware. But as I guess it has nothing to do with the firmeware.

4

It is Ubuntu 18.04 without ModemManager. I guess there is nothing to do with the firmware, but that’s the one thing I haven’t tried. As of now, I use only /dev/ttyUSB3 instead of /dev/ttyUSB2 as I have before. Any idea what may code such behavior ?

5

First, you can check whether there is any program that open the ttyUSB port.

lsof | grep ttyUSB

If you think it is only ttyUSB working maybe you can check

ls /dev/ttyUSB* -la

I guess that the /dev/ttyUSB2 is a regular file but not a char device file any more.