✎ accessory:connectivity:usb_gps [ODROID Wiki]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
===== Usage of USB GPS On Linux =====
<WRAP important round>
  * Operation confirmed with testing in our ODROID XU4 on
    * ubuntu-18.04-4.14-mate-odroid-xu4-20180501.img (Kernel Version 4.14.37-135).
    * ubuntu-16.04-mate-odroid-xu3-20170731.img (Kernel Version 3.10.105-141).
</WRAP>

<WRAP info round>
  * You should have been done **apt update && apt full-upgrade**.
  * You have to install **gpsd, gpsd-clients** packages to proceed.
</WRAP>


==== Configure gpsd ====
<WRAP tip round>
  * Put an actual GPS device node as the **DEVICES** option.
  * Although you don't enter any value for **DEVICES** option, you can use GPS utilities by putting actual GPS device node as the executable's parameter when you execute them.
    * Example) <code bash target>
odroid@odroid:~$ gpsmon /dev/ttyACM0 </code>
</WRAP>

Edit **/etc/default/gpsd** file as the below.
<code bash target>
odroid@odroid:~$ sudo vi /etc/default/gpsd
</code>
<code bash>
# Default settings for the gpsd init script and the hotplug wrapper.

# Start the gpsd daemon automatically at boot time
START_DAEMON="true"
# Use USB hotplugging to add new USB devices automatically to the daemon
USBAUTO="true"
# Devices gpsd should collect to at boot time.
# They need to be read/writeable, either by user gpsd or the group dialout.
DEVICES="/dev/ttyACM0"
# Other options you want to pass to gpsd
GPSD_OPTIONS="
</code>

Restart GPS daemon to apply edited GPS daemon configuration.
<code bash target>
/* GPS daemon stop/disable */
odroid@odroid:~$ sudo systemctl stop gpsd.socket
odroid@odroid:~$ sudo systemctl disable gpsd.socket
/* GPS daemon enable/start */
odroid@odroid:~$ sudo systemctl enable gpsd.socket
odroid@odroid:~$ sudo systemctl start gpsd.socket
</code>

==== Using the GPS ====
<WRAP tip round>
  * If timeout caused due to the disconnection of GPS daemon, kill GPS daemon processes and re-enable GPS daemon, then try again.
    * Example) <code bash target>
odroid@odroid:~$ sudo killall gpsd
/* GPS daemon stop/disable */
odroid@odroid:~$ sudo systemctl stop gpsd.socket
odroid@odroid:~$ sudo systemctl disable gpsd.socket
/* GPS daemon enable/start */
odroid@odroid:~$ sudo systemctl enable gpsd.socket
odroid@odroid:~$ sudo systemctl start gpsd.socket
</code>
</WRAP>


=== Method 1: Console Graphical ===
  * You can use <code bash target>odroid@odroid:~$ cgps -s</code> It will show a nice interface with all of the related GPS data.

  * Or You can use <code bash target>odroid@odroid:~$ gpsmon</code>
{{:en:gps2.png|}}

=== Method 2: Console Text (Python) ===
  * Run: <code bash target>odroid@odroid:~$ sudo apt-get install python-gps</code>

<file python testgps.py>
import gps

# Listen on port 2947 (gpsd) of localhost
session = gps.gps("localhost", "2947")
session.stream(gps.WATCH_ENABLE | gps.WATCH_NEWSTYLE)

while True:
    try:
    	report = session.next()
		# Wait for a 'TPV' report and display the current time
		# To see all report data, uncomment the line below
		# print report
        if report['class'] == 'TPV':
                print report.time
    except KeyError:
		pass
    except KeyboardInterrupt:
		quit()
    except StopIteration:
		session = None
		print "GPSD has terminated"
</file>

=== Method 3: X11 FoxtrotGPS ===
  * Install **foxtrotgps** (X11 for a graphical view) <code bash target>odroid@odroid:~$ sudo apt-get install foxtrotgps</code>

  * Just open a terminal and run: <code bash target>odroid@odroid:~$ foxtrotgps</code>

  * Or click Menu -> Accessories -> FoxtrotGPS

{{:en:gps1.png|}}