Tom,
refclock SHM 0 refid GPS precision 1e-1 offset 0.9999 delay 0.2 noselect
refclock SOCK /var/run/chrony.ttyAMA0.sock refid PPS lock GPS
I made the above changes, restarted chrony, waited 10 minutes and:
pi@gps ~/SystemFiles $ chronyc sources
210 Number of sources = 6
MS Name/IP address Stratum Poll LastRx Last sample
============================================================================
^~ 1.time.dbsinet.com 2 6 25 +2169ms[+2169ms] +/-80ms
^~ nist.netservicesgroup.com 1 6 7 +2168ms[+2168ms] +/-50ms
^~ pacific.latt.net 3 6 5 +2169ms[+2169ms] +/-77ms
^~ clock.trit.net 2 6 3 +2163ms[+2163ms] +/-28ms
#? GPS 0 4 10y +0ns[ +0ns] +/- 0ns
#? PPS 0 4 10y +0ns[ +0ns] +/- 0ns
This did fix PPS in that it now appears as 'PPS' and not 'PP'.
I'm beginning to think that the reference to chrony.ttyAMA0.sock may not
work for three reasons: isn't that serial access and I need GPIO?;
LastRx indicates no connection; and this looks like it may be messing up
gpsd as it uses ttyAMA0 as a source.
Deven
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