[time-nuts] Re: Knowing when the PPS signal is locked to the satellite.

[Sanjeev Gupta]

Dave,

I would suggest using the GPSD project.  The software is aware of, and
corrects, various quirks and gotchas in GPS devices.

You can use anything from polling JSON over telnet to a C API, and it will
reliably report the current mode, precision, etc.  Please see the 'status'
and 'mode' messages here: https://gpsd.gitlab.io/gpsd/gpsd_json.html#_tpv

And the good news is, the authors of the software are on this list :-)

-- 
Sanjeev Gupta
+65 98551208     http://www.linkedin.com/in/ghane


On Wed, 22 Jun 2022 at 21:23, Dave via time-nuts <time-nuts at lists.febo.com>
wrote:

> I am using a NEO-6M to provide a PPS signal for an experiment but I need
> to know when it is locked or not.
>
> Does anyone know if there is a way to find out from either the NMEA data
> stream or via the proprietary protocol ??
>
> At the moment I have it programmed to only provide a PPS signal when it
> is locked (or nothing if not) and monitor
> the PPS signal in the microprocessor, but it's not entirely satisfactory
> and I need a better mechanism.
>
> Dave
>
>
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