8:17 a.m.
Hi Michael,
Re-adding JH and mailing lists to conversation...
On 19/08/2019 10:00, Michael Nazzareno Trimarchi wrote:
Hi
On Mon, Aug 19, 2019 at 9:51 AM Jonas Bonn <jonas(a)norrbonn.se> wrote:
>
>
>
> On 19/08/2019 09:36, Michael Nazzareno Trimarchi wrote:
>> Can be chattering and rush current? Even are you sure that you don't have
>> some reset our of the ofono service that send an at command that
>> restart the modem?
>
> Just to try to prevent us from going down the wrong rabbit hole here:
> i) The modem is a QMI device so there are no AT commands being sent
Ok, so the uart used as ttyUSB0 and ttyUSB1 they don't support any AT command?
Is qmi part only the network interface?
ttyUSB0 and ttyUSB1 _do_ support AT commands, but are complementary to
the QMI interface which is a complete communication channel to the modem
in itself. The network interface is _only_ for the QMI channel: the
network packets are carried on a dedicated endpoint of the USB interface
supporting QMI.
I think the question of QMI vs AT is moot here. Internally the modem
does pretty much the same thing; it's just the interface that looks a
bit different.
In JH's case, only the 'qmimisc' device and the 'network' interface
are
in play via ofono. These are separate endpoints on a single USB
interface, all managed by the qmi-wwan driver in the kernel.
/Jonas
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Jonas Bonn