Bingo!

I couldn't imagine that modes could be switchable using AT commands.
I dosvered that HiLink mode can be switched to serial, using http://192.168.1.1/html/switchProjectMode.html
from this blog http://blog.phoenixhaven.net/category/haxx/
But I couldn't understand why there was reference to ...

In to other word, I can not even switch to initial mode using usb_modeswitch?
Ok, I will try to reset using AT commands

I as told I've executed command "/usr/bin/sg_raw /dev/sr0 11 06 20 00 00 00 00 00 01 00" in the beginning and it's always detected as 14db.
As I understand I need to retoron to cdrom mode and only after switch to 1442?
Could you please give me the proper commands?
Thanks!

I'm not sending any message or command when I plug or unplug the device, it's always in 12d1:14db mode

The problems is that after
command "/usr/bin/sg_raw /dev/sr0 11 06 20 00 00 00 00 00 01 00"

device is always in 12d1:14db mode

If I'm doing properly, the I command I should use is:
usb_modeswitch -v 12d1 -p 14db -V 12d1 -P 1442 -M "55534243123456780000000000000011062000000100000000000000000000"
usb_modeswitch -v 12d1 -p 14db -V 12d1 -P 1442 -M "55534243123456780000000000000011060000000000000000000000000000"
usb_modeswitch ...

Hi,

today I was trying to switch my E3131 to serial mode and discovered the following:

by default device is working as CD-Rom with ID 12d1:1f01

After I've executed command "/usr/bin/sg_raw /dev/sr0 11 06 20 00 00 00 00 00 01 00"
device swithced to CDC mode? with ID 12d1:14db

When I executed http ...