Leveraging GPS in MC7700

Aleksander Morgado aleksander at aleksander.es
Mon Feb 6 12:31:28 UTC 2017

On Mon, Feb 6, 2017 at 1:24 PM, Adam Sherman <adam at sherman.ca> wrote:
>>> So, am I understanding correctly that there is no way to get GPS data
>>> via a serial device, with this card?
>> No, there is a way to do that, enabling the GPS receiver with AT
>> commands and processing the NMEA traces received from another TTY; it
>> just isn't implemented in ModemManager. We could implement the
>> "unmanaged gps" location support in the Sierra plugin to handle that
>> usecase.
> If I need to use the GPS in this card right now, what does that look like?

For a quick hack, you could blacklist all tty ports exposed by the
modem with MM_PORT_IGNORE flags in udev rules, and then do the AT
commands to start/stop GPS yourself. This would leave the modem
running in QMI mode through ModemManager and you would be able to use
the ttys as you wish at the same time.


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