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how to make 3G HUAWEI E1731 Modem plug and play in Android 2.3.4 and Android 4.0.3

Dear all

i followed the below path

"http://processors.wiki.ti.com/index.php/TI-Android-ICS-PortingGuide#Android_USB_Configuration"

to configure the  HUAWEI E1731 3G dongle  to Android 2.3.4 and Android 4.0.3 and it worked fine by

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

                                                          xxx.sh

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

1) mount -t usbfs usbfs /proc/bus/usb
2) /system/xbin/usb_modeswitch -I -W -c /system/xbin/usb_modeswitch.conf
3) /system/bin/pppd /dev/ttyUSB0 115200 persist defaultroute usepeerdns updetach crtscts noauth debug connect "/system/xbin/chat -v -s -f /system/etc/ppp/airtel.chat"
4) setprop net.dns1 <IP1> 5) setprop net.dns2 <IP2>

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

using this above commands and Kernel configuration i success fully connected to the net. and browsed manully executing the commands.

what i want:

But the problem is using these commands 1-5 above i would like to create a shell script "XXX.sh" in /system/bin/
when i plug-in the Usb3G Modem in the usb hub "XXX.sh" should get executed.
I.e., i want to implement the functionality for Plug and Play.


so that i can use Usb3G Modem without any problem.

Could any one suggest me a solution to make it work in plug and play mode with the shell script "XXX.sh".
so that the XXX.sh script gets called when ever the "Usb3G Modem" is plugged-in.
PLATFORM:

BEAGLEBOARD-XM

Regards
Mahaboob A Aslam