Re: GPSd/NTPd timesync issue in JSON mode

[Roger Oberholtzer]

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> I actually don't need the 10Hz update rate for the time sync, but when using

> the device also for location based event triggering in a vehicle. What do you

> actually mean by 10Hz mode is a lie anyway? The GPS module I am using is

> at least from its specs capable of running with 10Hz.

I have the same use case. We collect GPS/NMEA data in a vehicle for position and orientation. And we want time syncd as well. Our issue is that gpsd seems to get confused when certain sentences arrive at more than 1 Hz (PPS rate). It seems to confuse it's notion of a group of records that are somehow related. And this results in it not sensing a time/PPS correctly. So nothing is passed on to clients like chrony. Has anyone else seen this behavior?

This has changed in more recent releases of gpsd. Time sync works in 3.17. But not in 3.23.

I fear I am hijacking this discussion. But then again it could be related as it is a time sync problem.

Roger Oberholtzer

 

RST Systems

 

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