(1) i have router at home with which two android devices is connected through WiFi (2) i want to send text message between two by getting device list from router and then sent message from source to destination
--i have searched a lot but did not find solution
and you will never find a solution .
First what you talking about is called hacking .
Second thing you can get the same result with some apps thats are currently available
for voice here some good apps:
https://play.google.com/store/apps/details?id=com.androidintercom
https://play.google.com/store/apps/details?id=com.remaller.android.wifitalkie_lite
for chating :
https://play.google.com/store/apps/details?id=com.ajaraj.wifisocial&hl=en
https://play.google.com/store/apps/details?id=com.edinbros.testlanandroid
*note that i dont test them so give them a try .
i hope this help you :)