How to get Bluetooth mac address of connected device?

[Pranay]

I have tried extracting Bluetooth address of connected device by using "ble_gap_addr_t" , by this i am able to get some address but that address is being changed after re-connection,why is it? I am using nRF51 DK.

[tesc]

Hi,

The address of a BLE device can change, depending on what type of address it uses. See this answer for the various address types and how they are supposed to behave.

Regards, Terje

[Pranay]

then Is there any way to identify that device if it tries to connect second time?

[Jørgen Kvalvaag]

Yes, look into the module peer_manager in the nRF5 SDK (or device_manager on older versions of the SDK)Link to peer_manager docs

[tesc]

It depends on the type of address, but if it is a bonded device then you can identify and authenticate the device. See peer manager as suggested by @jorg1

[Pranay]

Thanks...generally what type of BT address android device has?