Update command to check for USB sound card, exit if C&C off

command

@@ -5,17 +5,22 @@ echo -e "\nCommand and Control script for CubeSatSim v1.3.2\n"
 	FILE=/home/pi/CubeSatSim/command_control
 	if [ -f "$FILE" ]; then
     		echo "Radio command and control is ON"
-			echo "Turning Command and control to OFF"
-			sudo rm /home/pi/CubeSatSim/command_control
-			echo "rebooting"
-			sudo systemctl stop rpitx
-			sudo reboot now	
+#			echo "Turning Command and control to OFF"
+#			sudo rm /home/pi/CubeSatSim/command_control
+#			echo "rebooting"
+#			sudo systemctl stop rpitx
+#			sudo reboot now	
 #		fi
 
 	else 
     		echo "Radio command and control is OFF"
+		exit 1
 	fi
 
+
+# if [[ $(grep 'dtparam=audio=on' /boot/config.txt) ]]; then
+ if [[ $(arecord -l | grep card) ]]; then
+
 	echo "Starting direwolf"
 
 	if [ "$1" = "d" ]; then
@@ -29,4 +34,7 @@ else
 		direwolf -c /home/pi/CubeSatSim/direwolf-cc.conf -t 0l | python3 /home/pi/CubeSatSim/aprs_in.py
 	
 	fi
+else
+	echo "Starting squelch C&C"
 
+fi