diff --git a/general/overlay/etc/init.d/S30wireless b/general/overlay/etc/init.d/S30wireless
index aca931df..345c082c 100755
--- a/general/overlay/etc/init.d/S30wireless
+++ b/general/overlay/etc/init.d/S30wireless
@@ -1,64 +1,12 @@
 #!/bin/sh
-
-[ "$1" != "start" ] && exit 0
 device=$(fw_printenv -n wlandevice)
-[ -z "$device" ] && exit 0
 
-set_eth0() {
-	sed -i "s|^#auto|auto|g" /etc/network/interfaces.d/eth0
-	sed -i "s|^auto|#auto|g" /etc/network/interfaces.d/wlan0
-	exit 0
-}
-
-set_wlan0() {
-	sed -i "s|^auto|#auto|g" /etc/network/interfaces.d/eth0
-	sed -i "s|^#auto|auto|g" /etc/network/interfaces.d/wlan0
-	exit 0
-}
-
-# HI3516EV300 CamHi
-if [ "$device" = "mt7601u-hi3516ev300-camhi" ]; then
-	devmem 0x100C0080 32 0x530
-	echo 7 > /sys/class/gpio/export
-	echo out > /sys/class/gpio/gpio7/direction
-	echo 0 > /sys/class/gpio/gpio7/value
-	sleep 1
-	if lsusb | grep -q 7601; then
-		modprobe mt7601u
-		set_wlan0
+if [ "$1" = "start" ] && [ ! -z "$device" ]; then
+	if /etc/wireless "$device"; then
+		sed -i "s|^auto|#auto|g" /etc/network/interfaces.d/eth0
+		sed -i "s|^#auto|auto|g" /etc/network/interfaces.d/wlan0
+	else
+		sed -i "s|^#auto|auto|g" /etc/network/interfaces.d/eth0
+		sed -i "s|^auto|#auto|g" /etc/network/interfaces.d/wlan0
 	fi
 fi
-
-# SSC338Q CamHi
-if [ "$device" = "8733bu-ssc338q-camhi" ]; then
-	if lsusb | grep -q f72b; then
-		modprobe 8733bu
-		set_wlan0
-	fi
-fi
-
-# SSC337DE Foscam
-if [ "$device" = "8188fu-ssc337de-foscam" ]; then
-	echo 15 > /sys/class/gpio/export
-	echo out > /sys/class/gpio/gpio15/direction
-	echo 0 > /sys/class/gpio/gpio15/value
-	sleep 1
-	if lsusb | grep -q f179; then
-		modprobe 8188fu
-		set_wlan0
-	fi
-fi
-
-# T21 BJS
-if [ "$device" = "8188fu-t21-bjs" ]; then
-	echo 50 > /sys/class/gpio/export
-	echo out > /sys/class/gpio/gpio50/direction
-	echo 0 > /sys/class/gpio/gpio50/value
-	sleep 1
-	if lsusb | grep -q f179; then
-		modprobe 8188fu
-		set_wlan0
-	fi
-fi
-
-set_eth0
diff --git a/general/overlay/etc/wireless b/general/overlay/etc/wireless
new file mode 100755
index 00000000..0c393d5e
--- /dev/null
+++ b/general/overlay/etc/wireless
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+# HI3516EV300 CamHi
+if [ "$1" = "mt7601u-hi3516ev300-camhi" ]; then
+	devmem 0x100C0080 32 0x530
+	echo 7 > /sys/class/gpio/export
+	echo out > /sys/class/gpio/gpio7/direction
+	echo 0 > /sys/class/gpio/gpio7/value
+	sleep 1
+	modprobe mt7601u
+	exit 0
+fi
+
+# SSC338Q CamHi
+if [ "$1" = "8733bu-ssc338q-camhi" ]; then
+	modprobe 8733bu
+	exit 0
+fi
+
+# SSC337DE Foscam
+if [ "$1" = "8188fu-ssc337de-foscam" ]; then
+	echo 15 > /sys/class/gpio/export
+	echo out > /sys/class/gpio/gpio15/direction
+	echo 0 > /sys/class/gpio/gpio15/value
+	sleep 1
+	modprobe 8188fu
+	exit 0
+fi
+
+# T21 BJS
+if [ "$1" = "8188fu-t21-bjs" ]; then
+	echo 50 > /sys/class/gpio/export
+	echo out > /sys/class/gpio/gpio50/direction
+	echo 0 > /sys/class/gpio/gpio50/value
+	sleep 1
+	modprobe 8188fu
+	exit 0
+fi
+
+exit 1