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.

[Moritz]

The error you got was "NRF_ERROR_INVALID_ADDR (NRF_ERROR_BASE_NUM + 16)" So your program was stuck in an endless loop.

Your code needs to look like this to work.

ble_gap_privacy_params_t ble_gap_privacy_params = {0};
ble_gap_privacy_params.privacy_mode = BLE_GAP_PRIVACY_MODE_DEVICE_PRIVACY;
ble_gap_privacy_params.private_addr_type = BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE;
ble_gap_privacy_params.private_addr_cycle_s = BLE_GAP_DEFAULT_PRIVATE_ADDR_CYCLE_INTERVAL_S;
ble_gap_privacy_params.p_device_irk = NULL;
err_code = sd_ble_gap_privacy_set(&ble_gap_privacy_params);
APP_ERROR_CHECK(err_code);