[nRF52832] scan Beacon buffer

[KaiPham]

hi guys,

I was just getting started with Nordic nRF52832,
I want to find buffer containing bluetooth scanning data (Beacon) to process but see the examples but can't see.
Can you show me how that function is used

thank a lot!

[Jørgen Holmefjord]

Hi,

You do not say anything about which SDK version or which example you are using, but I will give you an example.

Starting with the ble_app_blinky_c central application in SDK 16.0.0, you can get the advertising data of scanned devices that do not match the scan filer in scan_evt_handler, using the following code:

static void scan_evt_handler(scan_evt_t const * p_scan_evt)
{
    ret_code_t err_code;

    switch(p_scan_evt->scan_evt_id)
    {
        case NRF_BLE_SCAN_EVT_NOT_FOUND:
            NRF_LOG_INFO("Received advertising from: %02x:%02x:%02x:%02x:%02x:%02x:%02x", p_scan_evt->params.p_not_found->peer_addr.addr[0], 
                                                                                          p_scan_evt->params.p_not_found->peer_addr.addr[1], 
                                                                                          p_scan_evt->params.p_not_found->peer_addr.addr[2], 
                                                                                          p_scan_evt->params.p_not_found->peer_addr.addr[3], 
                                                                                          p_scan_evt->params.p_not_found->peer_addr.addr[4], 
                                                                                          p_scan_evt->params.p_not_found->peer_addr.addr[5]);
            break;
        case NRF_BLE_SCAN_EVT_CONNECTING_ERROR:
            err_code = p_scan_evt->params.connecting_err.err_code;
            APP_ERROR_CHECK(err_code);
            break;
        default:
          break;
    }
}

This will print the address of the device that sent the advertising packet. Other beacon data can be accessed through the same struct.

To avoid that the scanner connects to a BLE blinky device, you must disable the scan filer by commenting out/removing these lines in scan_init():

    // Setting filters for scanning.
//    err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_NAME_FILTER, false);
//    APP_ERROR_CHECK(err_code);
//
//    err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_NAME_FILTER, m_target_periph_name);
//    APP_ERROR_CHECK(err_code);

ble_app_beacon_scanner.zip

Best regards,
Jørgen