[Gta04-owner] Modem is not reset when GTA04 is powered off

[Neil Jerram]

"Dr. H. Nikolaus Schaller" <hns at goldelico.com> writes:

> Hi Neil,
>
> Am 05.03.2012 um 20:11 schrieb Neil Jerram:
>
>> While testing sending DTMF tones a few days ago, I discovered that the
>> modem isn't reset when GTA04 is powered off.  It appears that the
>> battery has to be taken out.

> This is a known (severe) bug of the GTA04A3 (Early Adopter) boards.
>
> It has been fixed in the GTA04A4 board.

Right, yes, that rings a bell now.  And obviously it's good news that
this isn't a problem for GTA04A4.

> A software solution could be that e.g. QtMoko or SHR checks after
> starting the gsm daemon if calls are still running and applies
> a precautionary AT+CHUP. This would not harm booting a A4 board.

For GTA04A3, I'd like also to issue AT_ORESET (1) when booting up,
before starting up oFono or FSO, and (2) when shutting down the phone.

But the problem is that I can't work out how to script this so that it's
done automatically.  With "minicom -S ...", I can't make minicom quit
after the "OK" comes.

Does anyone know how it's possible to script sending "AT_ORESET" and
then expecting an "OK"?  (And similarly for AT+CHUP.)

(Sometimes I find that the modem appears to be in a stuck state after
powering on the phone, and I'm guessing that this is another problem
caused by the modem not having been completely switched off.  The
oFono-level symptom is as previously described at [1].  When it's in
this stuck state, it doesn't help to shutdown and reset oFono, but I
does help if I shutdown oFono, then do an AT_ORESET by hand, and then
restart oFono.

[1]
http://lists.goldelico.com/pipermail/gta04-owner/2012-February/001717.html)

Many thanks!

     Neil