Netgear 340u

[Bjørn Mork]

That's comp14. Not the same as 9, I'm afraid.

But the modem is of course not useless even if it is locked to MBIM only. Install libmbim and take it from there.


Bjørn

On 5 May 2014 01:00:34 CEST, David McCullough <david.mccullough at accelecon.com> wrote:
>
>Bjørn Mork wrote the following:
>> Noah Taber <noahtaber at gmail.com> writes:
>> 
>> > Well, I think I'm done with the 340u.  I'm pretty sure I broke it
>tonight.
>> >  I ran the following AT command:
>> >
>> > AT!UDUSBCOMP=9
>> >
>> > I only have a MBIM interface to the device.  I cannot connect to it
>through
>> > serial to issue anymore AT commands.
>> >
>> > Do any of you have any hints?  Otherwise, I'll get a different
>device.
>> 
>> Shit.  I was just writing you an email where I tried to warn about
>> exactly that.  Sorry.
>> 
>> I am pretty sure there is some way to fix it, but we just don't know
>> how.  These settings are most likely stored in some NVRAM variable.
>> One nice thing about that MBIM function is that it implements a QMI
>pass
>> through, so you still have all the power of QMI available.  So if we
>> knew how to fix this by using QMI, then it could be fixed.  It is
>> probably possible to force the modem into boot loader mode, where you
>> should be able to rewrite most of the flash contents including the
>> NVRAM.
>> 
>> In theory.  I wouldn't know how to do that.
>
>It should be ok,  all the 340u I have dealt with are in mode '9' and
>only
>present the MBIM interface.
>
>Under linux they present two configurations, and the MBIM interface is
>configration '2'.
>
>All i even do to get these modems operating is change them to
>configuration '1'.
>
>Find the correct /sys/bus/usb/devices/.../bNumConfigurations for your
>340u (the idProduct and idVendor files in the same directory will
>help).
>
>If this is working like I usually see, bNumConfigurations will be 2 and
>bConfigurationValue will be 2, fix this with:
>
>	echo 1 > bConfigurationValue
>
>Which should get you back to the QMI/tty interfaces (option number 6).
>
>Cheers,
>Davidm