Re: Mobile broadband on an embedded 3G modem

[Aleksander Morgado <aleksander aleksander es>]

On Fri, Oct 17, 2014 at 10:35 AM, Marius Kotsbak <marius kotsbak com> wrote:
> > We're trying to get a 3G modem connection going on an embedded device.
> > The modem is a MultiTech SocketModem MTSMC-H5-IP and it appears on
> > /dev/ttyAPP3 (i.e. hardware UART port on the SoC).
> >
> > If I run `screen /dev/ttyAPP3 115200`, I can interact with the modem, it
> > all works.  The challenge, is getting NetworkManager 0.9.10.0 to talk to
> > this modem.
> >
> > When I run `nmtui`, no option for adding the mobile broadband connection
> > appears, I suspect because NetworkManager doesn't know the 3G dongle
> > exists.  How do I tell it where to look?
>
> Is ModemManager running on the device? It should discover it automatically.

Yeah, check if ModemManager sees the device. NetworkManager uses
ModemManager to talk to mobile broadband modems. If you're using MM >=
1.x, which you likely are, try listing modems with "mmcli -L". If you
don't see it listed there, try to gather debug logs of ModemManager
following these steps:
  http://www.freedesktop.org/wiki/Software/ModemManager/Debugging/

Also, if the tty is from a physical serial port (i.e. no USB), you'll
likely need to tag the port in udev with the
ID_MM_PLATFORM_DRIVER_PROBE flag as well. ModemManager doesn't
automatically probe physical serial ports.

BTW; this is the ModemManager specific mailing list, you may want to
move the discussion there:
http://lists.freedesktop.org/mailman/listinfo/modemmanager-devel

-- 
Aleksander
https://aleksander.es