TS-7180 GPS: Difference between revisions

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(Clean up GPS text and mention how to start gpsd at boot)
 
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The TS-7180 has an on-board [http://www.telit.com/gnss/sl869/ Telit SL869] GPS receiver. A socket is provided for the connection of an antenna.
[[File:TS-7180-GPS-Antenna.png|300px]]
 
The TS-7180 has an optional on-board [http://www.telit.com/gnss/sl869/ Telit SL869] GPS receiver, accessible at <code>/dev/ttymxc7</code>, through which the GPS provides NMEA strings. An SMA female connector is provided for attaching an antenna.  


[[File:TS-7180-GPS-Antenna.png|300px]]
The GPS power is controllable through a GPIO.  For example:
<source lang=bash>
gpioset 5 19=1 # turn on GPS
gpioset 5 19=0 # turn off GPS
</source>
By default, the GPS module is powered on when the board starts up.
 
A typical way of interfacing with the GPS is using <code>gpsd</code>.  For example, under Debian, load these packages:
<source lang=bash>
apt install gpsd gpsd-clients -y
</source>
Then edit <code>/etc/default/gpsd</code> and enable and/or change these two variables:
<syntaxhighlight lang="bash">
# Devices gpsd should collect to at boot time.
# They need to be read/writeable, either by user gpsd or the group dialout.
DEVICES="/dev/ttymxc7"
 
# Other options you want to pass to gpsd
GPSD_OPTIONS="-n"
</syntaxhighlight>
 
Then restart gpsd:
<source lang=bash>
service gpsd restart
</source>
 
For testing, run <code>gpsmon</code> to see lock, coordinates, and time information.


Before it can be used, power to the GPS receiver must be enabled by setting GPIO #19 low, as shown below:
You will likely want <code>gpsd</code> to start automatically at boot. To make this always happen, type:
<source lang=bash>
<source lang=bash>
tshwctl -a 19 -r -w 1
systemctl enable gpsd
</source>
</source>


The GPS receiver may then be accessed via the /dev/ttymxc7 uart.
Finally, the following article describes writing clients that interface with <code>gpsd</code>, which can do so from most programming languages:
* [https://gpsd.gitlab.io/gpsd/client-howto.html gpsd writing clients]

Latest revision as of 16:01, 31 August 2021

TS-7180-GPS-Antenna.png

The TS-7180 has an optional on-board Telit SL869 GPS receiver, accessible at /dev/ttymxc7, through which the GPS provides NMEA strings. An SMA female connector is provided for attaching an antenna.

The GPS power is controllable through a GPIO. For example: 

gpioset 5 19=1 # turn on GPS
gpioset 5 19=0 # turn off GPS

By default, the GPS module is powered on when the board starts up.

A typical way of interfacing with the GPS is using gpsd. For example, under Debian, load these packages: 

apt install gpsd gpsd-clients -y

Then edit /etc/default/gpsd and enable and/or change these two variables: 

# Devices gpsd should collect to at boot time.
# They need to be read/writeable, either by user gpsd or the group dialout.
DEVICES="/dev/ttymxc7"

# Other options you want to pass to gpsd
GPSD_OPTIONS="-n"

Then restart gpsd: 

service gpsd restart

For testing, run gpsmon to see lock, coordinates, and time information.

You will likely want gpsd to start automatically at boot. To make this always happen, type: 

systemctl enable gpsd

Finally, the following article describes writing clients that interface with gpsd, which can do so from most programming languages:

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