Shalom!
Our central BLE nrf52840 device continuously scans using a UUID filter. I can see that the UUID is matched in nrf_ble_scan_on_adv_report(). In my ble_evt_handler's BLE_GAP_EVT_ADV_REPORT, I see all BLE devices in the central's range not only my sensor which is OK. I keep a list of the sensors with the filtered UUID and their RSSIs from their advertisements. I can select a MAC and connect to the device from the list without problems.
Now the company want to select a sensor according to its name which is sent in its scan response during he installation process.
I understand that I should be getting two events, one with the p_adv_report->type.scan_response flag raised. The flag is never raised.
Only for product installation, I would like to initiate a scan requests for the sensors, otherwise I would just like to sniff their advertisements.
static ble_gap_scan_params_t const m_scan_param =
{
.active = 0x01,
#if (NRF_SD_BLE_API_VERSION > 7)
.interval_us = NRF_BLE_SCAN_SCAN_INTERVAL * UNIT_0_625_MS,
.window_us = NRF_BLE_SCAN_SCAN_WINDOW * UNIT_0_625_MS,
#else
.interval = NRF_BLE_SCAN_SCAN_INTERVAL,
.window = NRF_BLE_SCAN_SCAN_WINDOW,
#endif // (NRF_SD_BLE_API_VERSION > 7)
.filter_policy = BLE_GAP_SCAN_FP_WHITELIST,
.timeout = SCAN_DURATION_WITELIST,
.scan_phys = BLE_GAP_PHY_1MBPS,
};
/**@brief Function for initializing the scanning and setting the filters.
*/
static void scan_init(bool connect_if_matc)
{
char sBuf[32];
ret_code_t err_code;
nrf_ble_scan_init_t init_scan;
memset(&init_scan, 0, sizeof(init_scan));
init_scan.connect_if_match = connect_if_matc;
init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;
#ifdef USE_PM
init_scan.p_scan_param = &m_scan_param;
#endif
err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
APP_ERROR_CHECK(err_code);
//-------------------------------------------------------------------------
// Remove any filters previously set
//-------------------------------------------------------------------------
err_code = nrf_ble_scan_all_filter_remove(&m_scan);
APP_ERROR_CHECK(err_code);
err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_UUID_FILTER, &m_ami_uuid);
APP_ERROR_CHECK(err_code);
err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_UUID_FILTER, true);
APP_ERROR_CHECK(err_code);
} // scan_init
How can I case a scan request to be sent?
Thank you
David Kaplan
