Hi:
Recently I would like to give the GPS time to Jetson Nano via NTP, I followed the instruction in: Adding a PPS source to ntpd, but when I finished the instruction, I could not get the ntp from GPS time, I will appreciate if you can give me some advice to solve this problem. When I used the command: sudo service ntp status, the result is :
The time is not the GMT time.
My ntp.conf file is:
/etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
driftfile /var/lib/ntp/ntp.drift
Leap seconds definition provided by tzdata
leapfile /usr/share/zoneinfo/leapseconds
logfile /var/log/ntpd.log
Enable writing of statistics records.
#statistics loopstats peerstats clockstats
#filegen loopstats file loopstats type day enable
#filegen peerstats file peerstats type day enable
#filegen clockstats file clockstats type day enable
ACL, Access Control Commands and Options
restrict -4 default notrap nomodify nopeer noquery limited
restrict -6 default notrap nomodify nopeer noquery limited
Needed for adding pool entries
restrict source nomodify noquery notrap
restrict 10.1.1.0 mask 255.255.255.0 nomodify
restrict 127.0.0.1
disable monitor
upstream ntp server list
pool time.apple.com iburst
ntp driver 28(SHM), Shared Memory Driver
GPS time
#server 127.127.28.0 minpoll 4 maxpoll 4
#fudge 127.127.28.0 time1 +0.46 refid GPS
Accurate PPS time
#server 127.127.28.1 minpoll 4 maxpoll 4 prefer
#fudge 127.127.28.1 refid PPS
ntp driver 20(GPS_NMEA), Generic NMEA GPS Receiver
server 127.127.20.0 mode 17 minpoll 4 maxpoll 4 prefer
fudge 127.127.20.0 time2 0.46 flag1 1 flag3 1 refid GPS