Hardware Reference
In-Depth Information
3.
Add the following script snippet:
#!/bin/bash
LAT=""
LONG=""
gpspipe -d -w -o /tmp/gpsdump
while ([ -z $LAT ] || [ -z $LONG ]) ; do
if [ -f /tmp/gpsdump ] ; then
LAT=$(cat /tmp/gpsdump | awk 'BEGIN{RS=","; FS=":"} /lat/
{save=$2} END {print save}')
LONG=$(cat /tmp/gpsdump | awk 'BEGIN{RS=","; FS=":"} /lon/
{save=$2} END {print save}')
fi
done
killall gpspipe
rm /tmp/gpsdump
echo "-lat=$LAT -long=$LONG"
Save and exit
nano
, then make the script executable with
chmod +x ~/
passgps.sh
.
The scripts launches a
gpspipe
session in the background, which will fill up
/tmp/gpsdump
with data obtained from
gpsd
. We then enter a while loop
until we're able to filter out the latitude and longitude from
/tmp/gpsdump
by using an
awk
command and we put the coordinates into the
LAT
and
LONG
variables. Then we clean up a bit after our script and output the coordinates
on a line suitable for
ttytter
.
4.
Now, all we need to do is tweet something with
-location
added as an
argument to enable geotagging for this particular tweet, then let our script
pass in the GPS coordinates. Just remember that you need to have
gpsd
running for our script to work.
pi@raspberrypi ~ $ ttytter -status="$(vcgencmd measure_temp)
today, feeling cozy" -location $(~/passgps.sh)
Tweet tagged with location obtained from GPS
