NMEA refclock

Hal Murray hmurray at megapathdsl.net
Thu Dec 3 02:42:31 UTC 2020

> are the default paths /dev/gps0 and /dev/gpspps0?  links are /dev/ttyAMA0 and
> /dev/pps0 

There should be an error message if it can't open the file.
There should be a message if it opens the file telling you the baud rate.

  16 Nov 00:40:41 ntpd[514]: NMEA(0) serial /dev/ttyAMA0 open at 9600 bps

There is some magic you have to go through to get /dev/ttyAMA0 away from the 
system console or bluetooth or something like that.   There are several web 
pages describing the details.  I'll fish out a URL if you can't find one.

These are my opinions.  I hate spam.

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