I am follwing the Bluetooth Tutorial:

https://developer.tizen.org/dev-guide/2.3.0/org.tizen.mobile.native.appprogramming/html/tutorials/net_tutorial/bluetooth_tutorial.htm

I could connect to other devices but could not exchange data. I used the code mentioned in the tutorial. 

But, I get error: 

[bt_socket_send_data] regist to fail.