Re: Modem Initialization

[Vincenzo Romano <vincenzo romano notorand it>]

2011/4/14 Aleksander Morgado <aleksander lanedo com>:
>
>> >> > Where on earth happens the modem initialization in NetWorkmanager?
>> >> > My interest is for GSM/3G modems as well as for POTS/ISDN modems.
>> >> > I've tried to browse the source code but it's quite difficult.
>> >> >
>> >>
>> >> What I've found so far is that the initialization is done in the modemmanager.
>> >> It looks like it's hardcoded, which looks quite weird to me.
>> >> I do need to make some extra optional initialization: is there any
>> >> hook for such a
>> >> need?
>> >
>> > ModemManager has some generic setup steps, plus 'plugins' for each
>> > modem/vendor known to make things differently. If your modem needs
>> > specific AT commands during initialization, you'll probably need to
>> > develop a new plugin for it.
>> >
>> > Cheers,
>>
>> Among other things, I'd need to harvest the localization information (AT+CREG)
>> from GSM/3G modems. 99.999% of such modems implement it but I don't see
>> how to do it.
>>
>> Any idea?
>
> I believe the generic plugin already harvests location area code and
> cell ID whenever available in the AT+CREG? reply. Although I never tried
> it myself, you can possibly use the GetLocation() method in the
> org.freedesktop.ModemManager.Modem.Location interface (once enabled with
> the Enable() method).
>
> Cheers!

That sounds great. But also needs that I have to write my own D-Bus
code in order
to enable and retrieve the localization data (lac/ci).
And, finally, for the other things I need to do there's no way at all.
I've given a look at the modemmanager code and there seems to be no
hook available
to send AT commands before the connection or after it ended.