Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

RE: Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

Simon — Tue, 29 Sep 2020 14:03:32 GMT

Try to add it in the following manner instead:

static ble_gap_scan_params_t m_scan_param =                               /**< Scan parameters requested for scanning and connection. */
{
    // Other params
    .filter_policy = BLE_GAP_SCAN_FP_WHITELIST,
    // Other params
};

.
.
.
.

/**@brief Function to start scanning. */
static void scan_start(void)
{
    ret_code_t ret;

    ret = nrf_ble_scan_params_set(&m_scan, &m_scan_param);

.
.
static void scan_init(void)
{
    .
    .
    .
    init_scan.p_scan_param     = &m_scan_param;

Best regards,

Simon

RE: Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

preethi16 — Wed, 16 Sep 2020 19:47:22 GMT

Hi Simon,

Sorry for the long delay. No have not made any progress. It is still the same like i have said before . i get that error when i make those changes.

Thanks,

Preethi

RE: Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

Simon — Sun, 24 May 2020 21:44:50 GMT

I am sorry for the long delay, I've been quite busy lately. Have you made any progress on this?

RE: Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

preethi16 — Tue, 05 May 2020 20:51:57 GMT

Hi Simon ,

I tired compiling with your changes and it throw me an error reporting the filter_policy is just read only. I have attached the screen post along with this message.

Thanks,

Preethi,

RE: Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

Simon — Mon, 04 May 2020 10:18:19 GMT

I have not tested this, but I think I figured out how to do this with the scanner (all changes are done to ble_app_uart_c/main.c):

In scan_init(), after memset(&init_scan, 0, sizeof(init_scan)), set init_scan.scan_param->filter_policy=BLE_GAP_SCAN_FP_WHITELIST.
In ble_app_uart_c/main.c, under scan_evt_handler()-->case
NRF_BLE_SCAN_EVT_WHITELIST_REQUEST you should set the whitelist using

sd_ble_gap_whitelist_set()

Could you report back to me if this works or not.

Best regards,

Simon

RE: Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

Simon — Wed, 29 Apr 2020 02:21:51 GMT

I will be gone until monday (4th of may) and I'm not able to look at
your issue until then

Best regards,
Simon

RE: Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

preethi16 — Mon, 20 Apr 2020 19:49:47 GMT

Hi Simon ,

Thanks for the detailed reply. I am trying on ble_peripheral where im whitelisting while using a scanner. It would be very nice of you if you can show how to whitelist in scanning in a peripheral/gatt server . I have done similar steps in the ble scanning evt handler.

Thanks,

Preethi.

RE: Whitelisting in Gatt Server mode (SDK 15.2 /nrf52840)

Simon — Sat, 18 Apr 2020 16:02:59 GMT

I managed to make it work using respectively \nRF5_SDK_15.2.0\examples\ble_peripheral\ble_app_uart and nRF5_SDK_15.2.0\examples\ble_central\ble_app_uart_c.

In ble_app_uart_c/main.c I figured out the address and address type by using sd_ble_gap_addr_get():

ret_code_t err_code;
    ble_gap_addr_t mac_addr;
    err_code = sd_ble_gap_addr_get(&mac_addr); 
    APP_ERROR_CHECK(err_code);

    if(BLE_GAP_ADDR_TYPE_PUBLIC == mac_addr.addr_type){
        NRF_LOG_INFO("Address type is BLE_GAP_ADDR_TYPE_PUBLIC");
    }else if(BLE_GAP_ADDR_TYPE_RANDOM_STATIC == mac_addr.addr_type){
        NRF_LOG_INFO("Address type is BLE_GAP_ADDR_TYPE_RANDOM_STATIC");
    } else if(BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE == mac_addr.addr_type){
        NRF_LOG_INFO("Address type is BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE");
    } else if(BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE == mac_addr.addr_type){
        NRF_LOG_INFO("Address type is BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE");
    } else if(BLE_GAP_ADDR_TYPE_ANONYMOUS == mac_addr.addr_type){
        NRF_LOG_INFO("Address type is BLE_GAP_ADDR_TYPE_ANONYMOUS");
    }
    
    NRF_LOG_INFO("Address: [%X, %X, %X, %X, %X, %X]", mac_addr.addr[0], mac_addr.addr[1], mac_addr.addr[2], mac_addr.addr[3], mac_addr.addr[4], mac_addr.addr[5]);

I got the following log:

Address type is BLE_GAP_ADDR_TYPE_RANDOM_STATIC
<info> app: Address: [D3, EA, 17, FD, E8, FB]

In ble_app_uart/main.c I made the following changes:

In main.c --> advertising_init() I added the following:

init.config.ble_adv_whitelist_enabled = true;

In the top of main.c -->on_adv_evt() I added the following:

ble_gap_addr_t whitelist_addr = {1, BLE_GAP_ADDR_TYPE_RANDOM_STATIC, {0xD3, 0xEA, 0x17, 0xFD, 0xE8, 0xFB}};
ble_gap_addr_t const     *p_whitelist_addr[] = {&whitelist_addr};

In main.c -->on_adv_evt() I added a new case:

        case BLE_ADV_EVT_WHITELIST_REQUEST:
            err_code = sd_ble_gap_whitelist_set(p_whitelist_addr, 1);
            APP_ERROR_CHECK(err_code);
            err_code = ble_advertising_whitelist_reply(&m_advertising, &whitelist_addr, 1, NULL, 0);
            APP_ERROR_CHECK(err_code);
            break;

You can also use scan filtering, which filters on a higher level of abstraction than the SoftDevice, read more about the difference here.

Best regards,

Simon