added test for USB device

gpsd/gps-test.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# from https://stackoverflow.com/questions/28387230/use-gpsd-or-cgps-to-return-latitude-and-longitude-then-quit
+
+gpspipe -w -n 5 | grep DEVICES | tail -n1|cut -d":" -f5|cut -d"," -f1 | grep ttyUSB 
+if [[ $(gpspipe -w -n 5 | grep DEVICES | tail -n1|cut -d":" -f5|cut -d"," -f1 | grep ttyUSB) ]]; then
+
+  x=$(gpspipe -w -n 10 |grep lon|tail -n1|cut -d":" -f9|cut -d"," -f1)
+  y=$(gpspipe -w -n 10 |grep lon|tail -n1|cut -d":" -f10|cut -d"," -f1)
+  a=$(gpspipe -w -n 10 |grep lon|tail -n1|cut -d":" -f11|cut -d"," -f1)
+  echo "$x $y $a"
+elif
+  echo "0 0 0"
+fi
+

gpsd/gps.sh

@@ -1,9 +0,0 @@
-#!/bin/bash
-
-# from https://stackoverflow.com/questions/28387230/use-gpsd-or-cgps-to-return-latitude-and-longitude-then-quit
-
-x=$(gpspipe -w -n 10 |grep lon|tail -n1|cut -d":" -f9|cut -d"," -f1)
-y=$(gpspipe -w -n 10 |grep lon|tail -n1|cut -d":" -f10|cut -d"," -f1)
-a=$(gpspipe -w -n 10 |grep lon|tail -n1|cut -d":" -f11|cut -d"," -f1)
-echo "$x $y $a"
-