refclock 28 gone wacky on me

Eric S. Raymond esr at
Fri Jun 10 01:58:37 UTC 2016

Frank Nicholas <frank at>:
> 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?
		<a href="">Eric S. Raymond</a>

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