Update update only write sim.cfg if changed

update

@@ -227,15 +227,11 @@ git pull --no-rebase > .updated_p
 
 #fi
 
+changed=0
 value=`cat /home/pi/CubeSatSim/sim.cfg`
 echo "$value" > /dev/null
 set -- $value
 
-	echo -e "Current sim.cfg configuration file:"	
-	echo
-	echo $1 $2 $3 $4 $5 $6 $7 $8 $9
-	echo
-
 if [ -z "$1" ] ; then n1="AMSAT" ; else n1=$1 ; fi
 if [ -z "$2" ] ; then n2="AMSAT" ; else n2=$2 ; fi
 if [ -z "$3" ] ; then n3="AMSAT" ; else n3=$3 ; fi
@@ -244,12 +240,19 @@ git pull --no-rebase > .updated_p
 if [ -z "$6" ] ; then n6="AMSAT" ; else n6=$6 ; fi
 if [ -z "$7" ] ; then n7="AMSAT" ; else n7=$7 ; fi
 if [ -z "$8" ] ; then n8="AMSAT" ; else n8=$8 ; fi
-	if [ -z "$9" ] ; then n9="AMSAT" ; else n9=$9 ; fi
+if [ -z "$9" ] ; then n9="AMSAT" ; changed=1 ; else n9=$9 ; fi
+
+if [ $changed -eq 1 ]; then
+	echo -e "Current sim.cfg configuration file:"	
+	echo
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $9
+	echo
 	
 	echo -e "\nCubeSatSim configuraation sim.cfg file updated to: \n"
 	echo
 	echo $n1 $n2 $n3 $n4 $n5 $n6 $n7 $n8 $n9
 	echo $n1 $n2 $n3 $n4 $n5 $n6 $n7 $n8 $n9 > /home/pi/CubeSatSim/sim.cfg
+fi
 
 if [ $FLAG -eq 1 ]; then
   echo "systemctl daemon-reload and reboot"