ModemManager kills gpsd socket

[Brent Sink]

Thanks David!  I totally missed that one in the man page.  I'm now able to
use gpsd on ttyUSB3.  However, I noticed one strange thing... when I have
gpsd running without MM, I have it set up to report the position every 1
second.  When MM is running, it seems to have changed it to every 30
seconds.  I tried forcing it to report every 1s using the required AT
commands, but I can't seem to change it.

You mentioned that MM will still setup the GPS parameters... is there a way
for me to change the parameters to report every 1s?  The --command option
seems to only be available in debug mode.

On Sun, Sep 6, 2015 at 9:21 PM, David McCullough <
david.mccullough at accelerated.com> wrote:

>
>
> Brent Sink wrote the following:
> > Hello,
> >
> > I have a Huawei mu609 mPCIe module that has GSM + GPS, and I'm using
> > ModemManager (and NetworkManager) to setup the connection to the network,
> > and gpsd to retrieve the GPS coordinates from the module.  This module
> > creates 5 serial ports (ttyUSB0 - ttyUSB4).  ttyUSB2 is used to send AT
> > commands, and ttyUSB3 is the output of the GPS data.  If I disable
> > ModemManager, I can get the GPS data from gpspipe and from a gpsd socket
> > that I have created.
> >
> > However, when ModemManager is enabled, I no longer get any data from the
> > GPS.  It seems like it just resets the device and gets rid of any
> > configurations I made.  I realize that I can also get the GPS data inside
> > of ModemManager using --location-get-gps-nmea, but this has no connection
> > to my gpsd socket.
> >
> > Am I doing something wrong?  Is there a way to still get data via a gpsd
> > socket while using ModemManager?  Let me know if you need the debug logs.
> > Thanks!
>
> Pretty sure you want to look at '--location-enable-gps-unmanaged' to allow
> other processes to manage the GPS data on the GPS data port without MM
> getting in the way,
>
> MM will still setup the GPS parameters though,  but you should be able to
> run gpsd on ttyUSB3,
>
> Cheers,
> Davidm
>
> --
> David McCullough,  david.mccullough at accelerated.com,   Ph: 0410 560 763
>



-- 
-brent
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