Update command add Loopback check

command

@@ -23,6 +23,18 @@ echo -e "\nCommand and Control script for CubeSatSim v1.3.2\n"
 #		exit 1
 	fi
 
+if [ "$1" = "d" ]; then
+
+	echo "debug mode"
+
+	debug=1
+
+else
+
+	debug=0
+
+fi
+
 echo "Waiting 20 seconds for USB"
 
 sleep 20
@@ -32,7 +44,7 @@ if [[ $(arecord -l | grep "USB Audio Device") ]] && [ -f "$FILE" ]; then
 
 	echo "Starting Direwolf DTMF and APRS Command and Control"
 
-	if [ "$1" = "d" ]; then
+	if [ "$debug" = "1" ]; then
 	
 		echo "debug mode"
 	
@@ -54,9 +66,14 @@ else
 		timeout 5 rtl-test
 
 		sudo modprobe snd-aloop
-		rtl_fm -M fm -f 435M -s 48k | aplay -D hw:2,0,0 -r 48000 -t raw -f S16_LE -c 1 &
 
-		if [ "$1" = "d" ]; then
+		value=`aplay -l | grep "Loopback"`
+		echo "$value" > /dev/null
+		set -- $value
+
+		rtl_fm -M fm -f 435M -s 48k | aplay -D hw:${2:0:1},0,0 -r 48000 -t raw -f S16_LE -c 1 &
+
+		if [ "$debug" = "1" ]; then
 		
 			echo "debug mode"