add connection error checking

diff --git a/heatpump-dimplex-wpm_ b/heatpump-dimplex-wpm_
index 0539946e1114e01b5c77b3a2cdcd084000296200..cbdf74f01493c1f829a88f80a2a358e733fa9645 100755 (executable)
--- a/heatpump-dimplex-wpm_
+++ b/heatpump-dimplex-wpm_
@@ -102,7 +102,13 @@ if [ "$1" = "config" ]; then
     exit 0
 fi
 
-data=`curl -s "http://$host/usr-cgi/xml.cgi?A|1|125|D|1|150|I|1|100" | xsltproc paths.xsl -`
+xml=`curl -fs "http://$host/usr-cgi/xml.cgi?A|1|125|D|1|150|I|1|100"`; ret=$?
+if [ "$ret" -ne 0 ]; then
+    echo "Error fetching data from heatpump server: $host"
+    exit 1
+fi
+
+data=`echo "$xml" | xsltproc paths.xsl -`
 
 #Outdoor temperature
 echo 'multigraph heatpump_dimplex_wpm_outtemp'