Get private Bluetooth device address

RE: Get private Bluetooth device address

Einar Thorsrud — Tue, 29 May 2018 13:24:05 GMT

Hi,

You are right, I read the question too quickly. For some reason "private" was converted to "public" in my head, which is obviously not the same :)

As you write, the SoftDevice does not have an API to get the current private resolvable address of the device. The sd_ble_gap_addr_get() will only return the identity address (public or random static), but not the current private resolvable address. It should be possible for the application to calculate the resolvable address using information you can obtain with sd_ble_gap_privacy_get(). It might not be as effective, but it should be OK as this is only done once per connection.

RE: Get private Bluetooth device address

Mateusz — Tue, 29 May 2018 12:41:13 GMT

Hi Einar,

According to the docs, sd_ble_gap_addr_set can only be used to set a public or static address, whereas the recommendation states to use a private address.

Private addresses can be set, indirectly, with the SDK by using sd_ble_gap_privacy_set, but there is no way to, as far I can tell, obtain the generated address.

RE: Get private Bluetooth device address

Einar Thorsrud — Tue, 29 May 2018 12:02:59 GMT

Hi,

I do not see anything that prevent you from following the recommendation if you want to. The SDK support it by allowing the application to set the address using sd_ble_gap_addr_set (sd_ble_gap_address_set for SoftDevice versions < 3.0.0). Nordic does not provide private addresses, but you can obtain a Bluetooth Address (BD_ADDR) range from the IEEE Registration Authority (see Assigned Numbers as the Bluetooth SIG website).