how to set ble gap address type to RANDOM_PRIVATE_RESOLVABLE

[littlebei]

I want to change the ble gap address type to RANDOM_PRIVATE_RESOLVABLE. In gap_params_init(), I add these line at the end of the function

ble_gap_addr_t *p_gap_address;
err_code = sd_ble_gap_addr_get(p_gap_address);
APP_ERROR_CHECK(err_code);
p_gap_address->addr_type = BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE;
err_code = sd_ble_gap_addr_set(p_gap_address);
APP_ERROR_CHECK(err_code);

The code is based on ble_app_template. No error or warning, but it does not work. what should I do?

[run_ar]

For S132 v3 you need to use sd_ble_gap_privacy_set if you want to use a random private resolvable address. See ble_gap_privacy_params_t for details.

[run_ar]

Yes, the using the timeslot api would work. Could it be possible to use a normal random static address? As long as you are non connectable I guess it shouldn't matter? And could you also elaborate on the usecase, i.e. why you need to use a private non resolvable address?

[ntn]

Hi, I stumbled upon this question again, 2 years later. One use case should be the eddystone application, where the address shall be changed constantly for privacy reason. I looked into Nordic Eddystone implementation and BLE_GAP_ADDR_TYPE_PUBLIC was used, which is wrong and should be private non resolvable address.

I however cannot manage to set the address to BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE, even if I have set the MSB 2 bits to 0x00. Error number 12802 (BLE_ERROR_GAP_INVALID_BLE_ADDR). SD 6.1, SDK 15.2. Is there any example in SDK that managed to set address type to BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE? Thanks!

[Shawn N.]

I am also running into this. 

sd_ble_gap_addr_set

should accept

BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE

addresses.

[run_ar]

For sd_ble_gap_addr_set

The address type must be either @ref BLE_GAP_ADDR_TYPE_PUBLIC or @ref BLE_GAP_ADDR_TYPE_RANDOM_STATIC

If you want to use a private address you should use sd_ble_gap_privacy_set. See message sequence chart here.