1.2-dev

warn-level-conf/50-tty.rules

@@ -1,3 +1,5 @@
 SUBSYSTEM=="pps[0-9]*", GROUP="dialout", MODE="0660"
 SUBSYSTEM=="tty[0-9]*", GROUP="dialout", MODE="0660"
-SUBSYSTEM=="tty[A-Z]*[0-9]*", GROUP="dialout", MODE="0660"
+SUBSYSTEM=="tty[A-Z]*[0-9]*", GROUP="dialout", MODE="0660"
+SUBSYSTEM=="i2c[A-Z]-*[0-9]*", GROUP="dialout", MODE="0660"
+SUBSYSTEM=="rtc[0-9]*", GROUP="dialout", MODE="0660"

warn-level-conf/chrony.conf

@@ -5,7 +5,7 @@
 # precision is how precise this is. not 1e-3 = 1 millisecond, so not very precision
 # poll 0 means poll every 2^0 seconds = 1 second poll interval
 # filter 3 means take the average/median (forget which) of the 3 most recent readings. NMEA can be jumpy so we're averaging here
-refclock SHM 0 refid NMEA offset 0.000 precision 1e-3 poll 0 filter 3
+refclock SHM 0 refid NMEA offset 0.000 precision 1e-6 poll 0 filter 3
 
 # PPS refclock is PPS specific, with /dev/pps0 being the source
 # refid PPS means call it the PPS source
@@ -16,7 +16,10 @@ refclock SHM 0 refid NMEA offset 0.000 precision 1e-3 poll 0 filter 3
 refclock PPS /dev/pps0 refid PPS lock NMEA offset 0.0 poll 3 trust
 
 # also enable logging by uncommenting the logging line
-log tracking measurements statistics
+# log tracking measurements statistics
+
+# Update RTC from system clock periodically
+makestep 0.1 3
 
 # allow local connections to ntp
 allow 10.0.0.0/24

warn-level-conf/root-crontab

@@ -1,3 +1,3 @@
 # m h  dom mon dow   command
-# set hardware I2C RTC every 5 minutes
-*/5 * * * * bash -c "/usr/sbin/hwclock -w 2>> /var/log/root-crontab.log"
+# set hardware I2C RTC hourly
+0 * * * * bash -c "/usr/sbin/hwclock -w 2>> /var/log/root-crontab.log"