Support for the Linux WWAN subsystem

Ramon Fontes ramonreisfontes at
Mon Aug 30 11:47:49 UTC 2021

> What MM version is that?

I have ModemManager 1.17.2 and kernel 5.14.0-051400rc5-generic #202108081730.

ModemManager -V
ModemManager 1.17.2
Copyright (C) 2008-2021 The ModemManager authors
License GPLv2+: GNU GPL version 2 or later
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

> Also, which ports are exposed in the system? Just the wwan control
> port, or do you also have a NET port as well for the same fake device?
> MM requires both things.

As far as I understood I have the NET port.

$ sudo modprobe wwan_hwsim
$ ls /sys/class/wwan/
$ wwan0  wwan0at0  wwan0at1  wwan1  wwan1at0  wwan1at1

> Binding the AT/QMI/MBIM control port operations with the corresponding
> actions in the 3GPP protocol stack would really be a fun project, but
> it would probably be a huge task, beware!


Ramon Fontes

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