OpenWRt can read input from mouse attached, see instructions on H-wrt.com

I connect a PIR motion detector board paralell to mouse button and get 
a simple digital input to router. In case of alarm the webcam takes picture. 

It took a while to figure out how to use output from 
cat /dev/input/event0
I continuously save mouse output to file.  And then check if file is empty. 
I could not find easier method.


In Ebay bought 5× Sensor Melder Module PIR Low Voltage Bewegungsmelder for 12 EUR.
http://cgi.ebay.de/5-Sensor-Melder-Module-PIR-Low-Voltage-Bewegungsmelder-/270786796651?pt=DE_Haus_Garten_Heimwerker_Sicherheitstechnik&hash=item3f0c269c6b

opkg install kmod-usb-serial-ftdi kmod-usb-hid

cat /dev/input/event0 | hexdump
cat /dev/input/event0 |hexdump
cat /dev/hiddev0 |hexdump
cat /proc/bus/input/devices
ls /dev/input/ -l




#########################################
while (true) do

if ps -ef |grep /dev/input/event2 |grep -v grep; then
echo "cat mouse runs"
else echo "starting cat mouse"
cat /dev/input/event2 > /www/test3 &
fi

if [ -s /www/test3 ]; then
echo "alarm"
#/www/webcam/webcamalarm.sh run here code that uploads picture
cat /dev/null > /www/test3
else
echo "quiet"
fi

done
#########################################