Re: [gpsd-dev] refclock 28 gone wacky on me

[Frank Nicholas]

> On Jun 9, 2016, at 9:58 PM, Eric S. Raymond <address@hidden> wrote:
> 
> Frank Nicholas <address@hidden>:
>> I can tell you from experience, that with the Adafruit hat, and the default 
>> sentences, 9600 baud is not fast enough.  Some periodic sentences (period > 
>> few seconds) will push a cycle past one (1) second.  Even when used with 
>> PPS, eventually it will eventually be marked as a false ticker.
> 
> That's odd.  The normal semtence budget including GPGSV should fit inside a
> second.  Are you getting some kind of $PMTK thing that pushes it over?

It’s been a while (years), and at the time it was pure NTP (no gpsd involved).  
Whatever the sentences were that were pushing it over didn’t happen very close 
together.  I seem to remember that one was reporting if it was using the 
external vs. internal antenna and that would probably have been a $PMTK 
sentence.  I was using an external antenna.  When I use it with gpsd, is gpsd 
“aware” of that chipset and turning some sentences off ($PMTK)?

Thanks,
Frank