Timeout Resolvable Private Address

[nobody_19]

Hello

Where is the the timeout for the Resolvable Private Address (RPA) defined?

• only possible in the central?
  • can I change the timeout in the android nrfConnect App? (For Testing my application?)
  • is there another test application where I can change the timeout?
• also possible in the peripheral with min/max timeouts?

What happens when central or periperals are trying to reconnect after one device was powered off (last RPA lost)? 

[Jørgen Holmefjord]

Hi,

There is no timeout, but you can set the private_addr_cycle_s to the interval at which you want the address to be updated by the softdevice (default is BLE_GAP_DEFAULT_PRIVATE_ADDR_CYCLE_INTERVAL_S). You can also use a timer in your application to update the address yourself.

Maximum address update interval is set by BLE_GAP_MAX_PRIVATE_ADDR_CYCLE_INTERVAL_S.

As far as I know, there is no way to change the address settings in nRF Connect App, it will use the default from the phone OS/HW.

If the devices have established a bond, the address can be verified using the IRK. This thread has some good information.

Best regards,
Jørgen

[Jørgen Holmefjord]

I would recommend you to read the following chapter in the Bluetooth specifications v5.0 - Vol 6, Part B, Chapter 6. This should answer your questions.

Bonding and flash storage of keys are handled by the Peer Manager library.