BLE Scan filter using MAC address

[Aamir]

Hi,

I am using nRF52840 Preview DK  with SDK v15.3.0 and SoftDevice API v6.1.1

I want to set a filter in the ble scan to connect only to the specified MAC address, 

my device MAC address is DC:C4:BE:B7:49:17

so, on the central side I have written the code like this

err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_ADDR_FILTER, "DCC4BEB74917");

am I doing this correctly, the device doesn't connect 

[Aamir]

I got the answer

static char const test_periph_addr[] = {0x17, 0x49, 0xB7, 0xBE, 0xC4, 0xDC};
err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_ADDR_FILTER, test_periph_addr);

first off, you have to reverse the bytes from LSB to MSB

[cann0021]

I tried your solution but only I have an error_code:7... Can you please help me on this ? I am leaving the scan_init function below.

static void scan_init(void)
{
    ret_code_t          err_code;
    nrf_ble_scan_init_t init_scan;
    static char const test_periph_addr[] = {0x47, 0x31, 0xAC, 0x83, 0x24, 0xDB};

    memset(&init_scan, 0, sizeof(init_scan));

    init_scan.connect_if_match = false;
    init_scan.conn_cfg_tag     = APP_BLE_CONN_CFG_TAG;

    err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_ADDR_FILTER, test_periph_addr);
    printf("err:%d",err_code);nrf_delay_ms(100);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_ADDR_FILTER, false);
    APP_ERROR_CHECK(err_code);
}