Can any one provide me the code for android phone to bluetoothmodule
i have to switch off the relay using android phone
My understanding from your question is ,you want to control an relay from an android mobile phone via bluettooth.
you need an android app ,Where you could download the APP from this link
and read the following article
the module we tested is LM400
It is connected to the microcontroller through UART,You could use Uart code to tranmit and receive the data through bluetooth.
First extablish connection by providing passcode once you open the app and the rest is simple,you need to receive the data through uart and make your own Control.