In LE Privacy mode, does the address of the advertising entity change after connection is established?

[sanjib]

In Bluetooth Spec (CoreV5.0, Vol6, Chepter6, Section1) it is mentioned that the random private address is generated periodically by a timer handler. I could not find any mention on whether the timer should be stopped when a connection is established. So, I could not figure out whether the address should keep changing even after the connection is established.

[Hung Bui]

Hi Sanjib,

When in connection the advertising address is not used. It's the access address (AA) that comes with the Connect request used.

If you continue to advertise after you get connected you can observer that the address will continue to change.

To read more about the real address used when advertising (BED6 address) and connecting, you can have a look at my blog series.