diff --git a/command b/command
index 6597b58e..c9d2bffb 100755
--- a/command
+++ b/command
@@ -61,35 +61,39 @@ else
 
 		echo "Direwolf mode set but no USB soundcard detected!"
 
-		echo "Trying RTL-FM"
+#		echo "Trying RTL-FM"
 
-		rtl-test
+		if [[ $(rtl-test | grep "No supported devices found.") ]] ; then
 
-		sudo modprobe snd-aloop
+			echo "No RTL-SDR detected.  Command and control is OFF"
+#			sleep 60
 
-		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"
-		
-			direwolf -r 48000 -c /home/pi/CubeSatSim/groundstation/direwolf/direwolf.conf -t 0l | python3 /home/pi/CubeSatSim/dtmf_aprs_cc.py d
-		
 		else
-		
-			direwolf -r 48000 -c /home/pi/CubeSatSim/groundstation/direwolf/direwolf.conf -t 0l | python3 /home/pi/CubeSatSim/dtmf_aprs_cc.py
-		
-		fi
-
-		sleep 5
-#		sudo killall -9 direwolf
-#		sudo killall -9 rtl_fm
 
-#		echo "Starting Carrier (squelch) Command and Control"
+			sudo modprobe snd-aloop
+	
+			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"
+			
+				direwolf -r 48000 -c /home/pi/CubeSatSim/groundstation/direwolf/direwolf.conf -t 0l | python3 /home/pi/CubeSatSim/dtmf_aprs_cc.py d
+			
+			else
+			
+				direwolf -r 48000 -c /home/pi/CubeSatSim/groundstation/direwolf/direwolf.conf -t 0l | python3 /home/pi/CubeSatSim/dtmf_aprs_cc.py
+			
+			fi
+
+			sleep 5
+	#		sudo killall -9 direwolf
+	#		sudo killall -9 rtl_fm
+		fi
 	else
 
 		echo "Starting Carrier (squelch) Command and Control"