Lunchtime HOTFIX: Bring back USB console to operational, allow single-USB connection operation via QGC

ROMFS/px4fmu_common/init.d/rc.sensors

@@ -34,9 +34,10 @@ fi
 # ALWAYS start this task before the
 # preflight_check.
 #
-sensors start
-
-#
-# Check sensors - run AFTER 'sensors start'
-#
-preflight_check
+if sensors start
+then
+	#
+	# Check sensors - run AFTER 'sensors start'
+	#
+	preflight_check
+fi

ROMFS/px4fmu_common/init.d/rc.usb

@@ -5,8 +5,33 @@
 
 echo "Starting MAVLink on this USB console"
 
+# Stop tone alarm
+tone_alarm stop
+
 # Tell MAVLink that this link is "fast"
-mavlink start -b 230400 -d /dev/console
+if mavlink stop
+then
+	echo "stopped other MAVLink instance"
+fi
+mavlink start -b 230400 -d /dev/ttyACM0
+
+# Start the commander
+commander start
+
+# Start sensors
+sh /etc/init.d/rc.sensors
+
+# Start one of the estimators
+if attitude_estimator_ekf start
+then
+	echo "estimating attitude"
+fi
+
+# Start GPS
+if gps start
+then
+	echo "GPS started"
+fi
 
 echo "MAVLink started, exiting shell.."