Sierra Wireless EM7455, MBIM connect

Aleksander Morgado aleksander at
Wed Apr 20 11:53:45 UTC 2016

On Wed, Apr 20, 2016 at 1:37 PM, Fabian Schörghofer
<fabian.schoergi at> wrote:
>> So you'd better make sure at least one process is keeping the
>> /dev/cdc-wdm0 open while you are in an MBIM session (i.e. between MBIM
>> OPEN and MBIM CLOSE).  That's the way you inform the driver that you are
>> in a session.  I recommend using the proxy for that, but it doesn't seem
>> to be straight forward with the mbim-network script.  Another
>> alternative, which I use with e.g. umbim, is simply cat'ing to the
>> device in another terminal:  "cat >/dev/cdc-wdm0".

We should add the PROXY=yes setting to mbim-network, as we did for qmi-network.

>> (note that you should not *read* from the device, because only one
>> process can read - and you want that process to be mbimcli)
> This does not sound very reliable because ultimately I want to use the
> device on a device where only umbim is available.

libmbim for OpenWRT is not an option? (attached).

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