我這台 ASUS 的 Laptop M24NE C5PDR 上面有四個 LED 燈，分別代表了 power,
battery, email, wireless ，在使用 windows driver 時會自動控制這幾個燈
號，很幸運的，從 Linux 下面也可以透過 asus_acpi 控制這幾個燈號，例如要
讓 email 燈亮，只要 echo 1 > /proc/acpi/asus/mled 就可以，所以我分
別設定了有新郵件時，讓 mled 亮，搜尋到 AP 時，讓 wled 亮，非常的方便
😉
底下是 wifi led 設定 script:
#!/bin/sh
#set -x
WIFI_STATE=off
TOGGLE=false
trap 'leave' INT QUIT TERM
leave()
{
echo 0 > /proc/acpi/asus/wled
echo "Wifi Led Monitor: off"
exit 0
}
while true
do
if [ `cat /proc/net/wireless |sed '1,2d'|awk '{print $4}'|bc` -gt 0 ]
then
if [ $WIFI_STATE = off ]
then
WIFI_STATE=on
TOGGLE=true
else
TOGGLE=false
fi
elif [ $WIFI_STATE = on ]
then
WIFI_STATE=off
TOGGLE=true
fi
if [ $TOGGLE = true ]
then
if [ $WIFI_STATE = on ]
then
echo 1 > /proc/acpi/asus/wled
else
echo 0 > /proc/acpi/asus/wled
fi
fi
sleep 1
done