How to get Ubuntu system with ntpd receiving data from GPS through USB and set clock accuracy?

Question

I have a hardware which is Ublox EVK-M8T kit, with the GPS antenna.

I also install the gpsd and ntp in the Ubuntu system.

I check to make sure all are working probably, such as:

turn of daemon os:
```
sudo service gpsd stop
```
Remove any sockets gpsd might have left behind:
```
sudo rm /var/run/gpsd.sock
```
make sure there is no instance of gpsd running:
```
sudo killall -9 gpsd ntpd
```
find the current USB devices connected to the RPI:
```
ls /dev/ttyACM0
```
check that your device is emitting data, and save MNEA message to logfile:
```
gpsmon /dev/ttyACM0 -l logfile
```
and also work with:
```
cgps -s
xgps
```
reconfiguration file:
```
sudo service ntp reload
```
see status overtime, show us all the clocks and what times are?
```
sudo ntpq -p
```
check ntp status:
```
service ntp status
```
change the server:
```
sudo vim /etc/ntp.conf
```
and:
```
ntpdate -d 192.168.1.231
```

....

Those are steps that I was trying to set up gpsd and ntpd, but I still do not understand, why do I have to do that?

How can I get an get Ubuntu system with ntpd receiving data from GPS through USB and set clock accuracy?

Thank you.

I think this link: http://askubuntu.com/questions/228/how-to-set-ubuntu-to-synchronize-my-clock-with-a-time-server?rq=1 are similar your question. — Nate Duong, Mar 30 '17 at 14:17
The alleged duplicate is about syncing with ntp, but this asks about gps through usb. — RonJohn, Mar 06 '18 at 02:49
@RonJohn you're right, thanks. I had misunderstood the problem. — terdon, Mar 06 '18 at 10:24

0 Answers0