问题
I want to Send AT Command to Android phone.
I know SDK does not support this.
but there are two solution :
change the code of Kernel and release your new Android (it seems it is so hard!)
LoopBack on
USB.(i think Bluetooth is same)
About second solution , when you connect your phone to PC with USB cable , you will see a GSM modem on Device Manager that help you to send AT Command to GSM Modem.
If we find a solution to loop back on mobile phone , we can send AT commands to GSM Modem.
Question is : HOW to loop back and what tty file on kernel will help us?
回答1:
first you have to root the phone then in adb shell
su
echo -e "AT\r" > /dev/smd0
if you want to see answer use
cat /dev/smd0
i've test this command in samsung mini,cooper,s+ and it works.
if you use htc (htc rhyme tested) try to adb shell and type this command "radiooptions 13 AT" if you want to see answer type "logcat -b radio"
try echo to /dev/smd0 for other devices
*you can use this command in sdk java code by using Runtime.exec (require su)
来源：https://stackoverflow.com/questions/8284067/send-at-commands-to-android-phone