Re: [gpsd-dev] Minimum working example for libgps

[Gary E. Miller]

Yo David!

On Sat, 4 Nov 2017 15:13:31 +0800
David Huichen Dai <address@hidden> wrote:

> Thanks for your reply. Why do you say that my sensor reports at
> 1-second interval? I set the gps_waiting time to 2 seconds, which
> means I wait for up to 2 seconds to get the coordinates, not sampling
> every 2 seconds, right?

gps_waiting is client side.  But your GPS just sends data when it wants to,
usualy PVT once a second, and gpsd passes it on when it sees it.  Thus you
should get PVT once a second.

> Do I need a separate thread to sample the coordinates, store them in a
> variable, and access it from other thread when I need the
> coordinates? Is this the common way to use the libgps?

Nah, the OS buffers the socket for you.  Just poll the gpsd interface in
you main loop.

RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
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