anton@lab5mbp1
99358ea23c
* moving materials from https://og2k.com/pub/make/hardware/RPi/ to https://github.com/InstallAndUse/RPi /A
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2 years ago | |
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| README.md | 2 years ago | |
README.md
In this project we shall setup NTP-server on Raspberry using GPS-receiver connected to serial port.
#
2020 05 26 + init chrony@rpi /A
2022 03 19 + published on https://github.com/InstallAndUse/RPi /A
#
getting time from gps
apt install gpsd gpsd-clients python-gps nano /etc/default/gpsd
DEVICES="/dev/ttyAMA0"
GPSD_OPTIONS="-n"
systemctl enable gpsd && systemctl restart gpsd systemctl status gpsd
add serial device (BT uses another one)
nano /boot/config.txt
dtoverlay=pi3-miniuart-bt
core_freq=250
shutdown -r now
test
cgps -s gpsmon -n
setting up NTP server
apt install chrony #? systemctl enable chronyd && systemctl restart chronyd systemctl status chronyd chronyc sources -v nano /etc/chrony/chrony.conf
# comment for setup, uncomment on finish (to keep for time comparison)
pool 2.fedora.pool.ntp.org iburst
pool 2.debian.pool.ntp.org iburst
# add NMEA source as time reference
refclock SHM 0 offset 0.5 delay 0.2 refid NMEA
systemctl restart chronyd chronyc sources -v
test
ntpshmmon
set up NTP server
nano /etc/chrony/chrony.conf
allow 192.168.0.0/16
systemctl restart chronyd
test
chronyc
clients
serverstats
clean and remove ntpdate
apt remove ntpdate
Remove ntp-servers from
nano /etc/dhcp/dhclient.conf
# remove "request ntp-servers"
# remove "option ntp_servers"
rm
/etc/dhcp/dhclient-exit-hooks.d/ntp
/lib/dhcpcd/dhcpcd-hooks/50-ntp.conf
/var/lib/ntp/ntp.conf.dhcp (might not exist)
#