diff --git a/devices/t21_lite_chinamobile-hdc-51-a5-v12/general/overlay/usr/sbin/qrscan.sh b/devices/t21_lite_chinamobile-hdc-51-a5-v12/general/overlay/usr/sbin/qrscan.sh
index 2c902ac..2908201 100755
--- a/devices/t21_lite_chinamobile-hdc-51-a5-v12/general/overlay/usr/sbin/qrscan.sh
+++ b/devices/t21_lite_chinamobile-hdc-51-a5-v12/general/overlay/usr/sbin/qrscan.sh
@@ -3,13 +3,12 @@
 gpio=53   # RED led, t21_lite_chinamobile-hdc-51-a5-v12
 n=0
 
-echo 1 > /sys/class/gpio/gpio${gpio}/active_low
-gpio set ${gpio} | logger -t gpio
+gpio clear ${gpio} | logger -t gpio
 
 while true ; do
     if [ "$n" -ge 30 ]; then
         logger -t qrscan "Recognition timeout exceeded, reboot camera and try again..."
-        gpio clear ${gpio} | logger -t gpio
+        gpio set ${gpio} | logger -t gpio
         exit 1
     fi
     timeout 1 wget -q -O /tmp/image.jpg http://127.0.0.1/image.jpg
@@ -17,7 +16,6 @@ while true ; do
     if [[ -n "$data" ]] && $(echo "$data" | grep -q =); then
         fw_setenv $(echo $data | cut -d " " -f 1 | sed 's/=/ /')
         fw_setenv $(echo $data | cut -d " " -f 2 | sed 's/=/ /')
-        fw_setenv $(echo $data | cut -d " " -f 3 | sed 's/=/ /')
         logger -t qrscan "Recognition successfully, wlanssid and wlanpass is writed to env. Reboot required."
         curl --data-binary @/usr/lib/sounds/ready_48k.pcm http://localhost/play_audio
         for a in $(seq 10) ; do (gpio set ${gpio} ; sleep 0.3 ; gpio clear ${gpio} ; sleep 0.3 ) ; done >/dev/null 2>&1