advertising to pre shared irk

[Naralasetty Praneeth]

i need a help

As mentioned in this thread

https://devzone.nordicsemi.com/f/nordic-q-a/18512/directed-advertising-with-pre-shared-irk

in need to do directed advertising with pre shared irk

this is my code where should i add on the peripheral side

#include <stdint.h>
#include <string.h>

#include "ble_advertising.h"
#include "nordic_common.h"
#include "nrf.h"
#include "nrf_soc.h"
#include "nrf_drv_saadc.h"
#include "nrf_sdm.h"
#include "app_error.h"
#include "ble.h"
#include "ble_err.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_tps.h"
#include "ble_ias.h"
#include "ble_lls.h"
#include "ble_bas.h"
#include "ble_conn_params.h"
#include "ble_conn_state.h"
#include "sensorsim.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "app_timer.h"
#include "app_error.h"
#include "ble_ias_c.h"
#include "app_util.h"
#include "bsp_btn_ble.h"
#include "ble_db_discovery.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"
#include "fds.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_lesc.h"
#include "nrf_ble_qwr.h"
//#include "nrf_ble_scan.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_fstorage.h"

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"


#define DEVICE_NAME                     "NORDIC"                           

#define APP_BLE_OBSERVER_PRIO           3                                       
#define APP_BLE_CONN_CFG_TAG            1                                       

#define BATTERY_LEVEL_MEAS_INTERVAL     APP_TIMER_TICKS(120000)                 

#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(500, UNIT_1_25_MS)        
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(1000, UNIT_1_25_MS)       
#define SLAVE_LATENCY                   0                                       
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)         

//#define APP_ADV_INTERVAL                40                                       
#define NON_CONNECTABLE_ADV_INTERVAL    MSEC_TO_UNITS(100, UNIT_0_625_MS)  

#define APP_ADV_DURATION                18000                                    

#define FIRST_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(5000)                   
#define NEXT_CONN_PARAMS_UPDATE_DELAY   APP_TIMER_TICKS(30000)                  
#define MAX_CONN_PARAMS_UPDATE_COUNT    3                                       

#define SEC_PARAM_BOND                  1                                       
#define SEC_PARAM_MITM                  0                                       
#define SEC_PARAM_LESC                  0                                       
#define SEC_PARAM_KEYPRESS              0                                       
#define SEC_PARAM_IO_CAPABILITIES       BLE_GAP_IO_CAPS_NONE                    
#define SEC_PARAM_OOB                   0                                       
#define SEC_PARAM_MIN_KEY_SIZE          7                                       
#define SEC_PARAM_MAX_KEY_SIZE          16                                      

#define INITIAL_LLS_ALERT_LEVEL         BLE_CHAR_ALERT_LEVEL_NO_ALERT           
#define TX_POWER_LEVEL                  (-8)                                    

#define ADC_REF_VOLTAGE_IN_MILLIVOLTS   600                                     
#define ADC_PRE_SCALING_COMPENSATION    6                                       
#define DIODE_FWD_VOLT_DROP_MILLIVOLTS  270                                     
#define ADC_RES_10BIT                   1024                                    

#define DEAD_BEEF                       0xDEADBEEF                              

#define APP_BEACON_INFO_LENGTH          0x17                               
#define APP_ADV_DATA_LENGTH             0x15                               
#define APP_DEVICE_TYPE                 0x02                               
#define APP_MEASURED_RSSI               0xC5                               
#define APP_COMPANY_IDENTIFIER          0x004C                             
#define APP_MAJOR_VALUE                 0x00, 0x02                         
#define APP_MINOR_VALUE                 0x00, 0x02                         
#define APP_BEACON_UUID                 0x01, 0x12, 0x23, 0x34, \
                                        0x45, 0x56, 0x67, 0x78, \
                                        0x89, 0x9a, 0xab, 0xbc, \
                                        0xcd, 0xde, 0xef, 0xf0            

#if defined(USE_UICR_FOR_MAJ_MIN_VALUES)
#define MAJ_VAL_OFFSET_IN_BEACON_INFO   18                                
#define UICR_ADDRESS                    0x10001080                         
#endif


#define ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE)\
        ((((ADC_VALUE) * ADC_REF_VOLTAGE_IN_MILLIVOLTS) / ADC_RES_10BIT) * ADC_PRE_SCALING_COMPENSATION)


APP_TIMER_DEF(m_battery_timer_id);                      
BLE_TPS_DEF(m_tps);                                     
BLE_IAS_DEF(m_ias, NRF_SDH_BLE_TOTAL_LINK_COUNT);       
BLE_LLS_DEF(m_lls);                                     
BLE_BAS_DEF(m_bas);                                     
BLE_IAS_C_DEF(m_ias_c);                                 
NRF_BLE_GATT_DEF(m_gatt);                               
NRF_BLE_QWR_DEF(m_qwr);                                 
BLE_ADVERTISING_DEF(m_advertising);                     
BLE_DB_DISCOVERY_DEF(m_ble_db_discovery);               

static volatile bool m_is_high_alert_signalled;         
static volatile bool m_is_ias_present = false;          

static nrf_saadc_value_t adc_buf[2];

static ble_uuid_t m_adv_uuids[] =                       
{
    {BLE_UUID_IMMEDIATE_ALERT_SERVICE, BLE_UUID_TYPE_BLE},
    {BLE_UUID_BATTERY_SERVICE, BLE_UUID_TYPE_BLE},
    {BLE_UUID_TX_POWER_SERVICE, BLE_UUID_TYPE_BLE},
    {BLE_UUID_LINK_LOSS_SERVICE, BLE_UUID_TYPE_BLE}
};

static ble_gap_adv_params_t m_adv_params;                                  
static uint8_t              m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET; 
static uint8_t              m_enc_advdata[BLE_GAP_ADV_SET_DATA_SIZE_MAX];  
static uint8_t              m_enc_scandata[BLE_GAP_ADV_SET_DATA_SIZE_MAX];  


static ble_gap_adv_data_t m_adv_data =
{
    .adv_data =
    {
        .p_data = m_enc_advdata,
        .len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX
    },
    .scan_rsp_data =
    {
        .p_data = m_enc_scandata,
        .len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX

    }
};




static uint8_t m_beacon_info[APP_BEACON_INFO_LENGTH] =                    
{
    APP_DEVICE_TYPE,     
                         
    APP_ADV_DATA_LENGTH, 
                         
    APP_BEACON_UUID,     
    APP_MAJOR_VALUE,     
    APP_MINOR_VALUE,     
    APP_MEASURED_RSSI    
                         
};


static void on_ias_evt(ble_ias_t * p_ias, ble_ias_evt_t * p_evt);
static void on_lls_evt(ble_lls_t * p_lls, ble_lls_evt_t * p_evt);
static void on_ias_c_evt(ble_ias_c_t * p_lls, ble_ias_c_evt_t * p_evt);
static void on_bas_evt(ble_bas_t * p_bas, ble_bas_evt_t * p_evt);
static void advertising_init(void);
static void advertising_start(bool erase_bonds);



void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
    app_error_handler(DEAD_BEEF, line_num, p_file_name);
}



static void service_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}



static void pm_evt_handler(pm_evt_t const * p_evt)
{
    pm_handler_on_pm_evt(p_evt);
    pm_handler_flash_clean(p_evt);

    switch (p_evt->evt_id)
    {
        case PM_EVT_PEERS_DELETE_SUCCEEDED:
            advertising_start(false);
            break;

        default:
            break;
    }
}



void saadc_event_handler(nrf_drv_saadc_evt_t const * p_event)
{
    if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
    {
        nrf_saadc_value_t adc_result;
        uint16_t          batt_lvl_in_milli_volts;
        uint8_t           percentage_batt_lvl;
        uint32_t          err_code;

        adc_result = p_event->data.done.p_buffer[0];

        err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, 1);
        APP_ERROR_CHECK(err_code);

        batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) +
                                  DIODE_FWD_VOLT_DROP_MILLIVOLTS;
        percentage_batt_lvl = battery_level_in_percent(batt_lvl_in_milli_volts);

        err_code = ble_bas_battery_level_update(&m_bas, percentage_batt_lvl, BLE_CONN_HANDLE_ALL);
        if ((err_code != NRF_SUCCESS) &&
            (err_code != NRF_ERROR_INVALID_STATE) &&
            (err_code != NRF_ERROR_RESOURCES) &&
            (err_code != NRF_ERROR_BUSY) &&
            (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
           )
        {
            APP_ERROR_HANDLER(err_code);
        }
    }
}



static void db_disc_handler(ble_db_discovery_evt_t * p_evt)
{
    ble_ias_c_on_db_disc_evt(&m_ias_c, p_evt);
}



static void adc_configure(void)
{
    ret_code_t err_code = nrf_drv_saadc_init(NULL, saadc_event_handler);
    APP_ERROR_CHECK(err_code);

    nrf_saadc_channel_config_t config =
        NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_VDD);
    err_code = nrf_drv_saadc_channel_init(0, &config);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(&adc_buf[0], 1);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(&adc_buf[1], 1);
    APP_ERROR_CHECK(err_code);
}



static void battery_level_meas_timeout_handler(void * p_context)
{
    UNUSED_PARAMETER(p_context);

    ret_code_t err_code;
    err_code = nrf_drv_saadc_sample();
    APP_ERROR_CHECK(err_code);
}



static void timers_init(void)
{
    ret_code_t err_code;

    
    err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);

    
    err_code = app_timer_create(&m_battery_timer_id,
                                APP_TIMER_MODE_REPEATED,
                                battery_level_meas_timeout_handler);
    APP_ERROR_CHECK(err_code);
}



static void gap_params_init(void)
{
    ret_code_t              err_code;
    ble_gap_conn_params_t   gap_conn_params;
    ble_gap_conn_sec_mode_t sec_mode;

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

    err_code = sd_ble_gap_device_name_set(&sec_mode,
                                          (const uint8_t *)DEVICE_NAME,
                                          strlen(DEVICE_NAME));
    APP_ERROR_CHECK(err_code);

    err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_GENERIC_KEYRING);
    APP_ERROR_CHECK(err_code);

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

    gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
    gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
    gap_conn_params.slave_latency     = SLAVE_LATENCY;
    gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;

    err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
    APP_ERROR_CHECK(err_code);
}



static void gatt_init(void)
{
    ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
    APP_ERROR_CHECK(err_code);
}



static void sleep_mode_enter(void)
{
    ret_code_t err_code;

    err_code = bsp_indication_set(BSP_INDICATE_IDLE);
    APP_ERROR_CHECK(err_code);

    
    err_code = bsp_btn_ble_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);

    
    err_code = sd_power_system_off();
    APP_ERROR_CHECK(err_code);
}



static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
{
    ret_code_t err_code;

    switch (ble_adv_evt)
    {
        case BLE_ADV_EVT_FAST:
            NRF_LOG_INFO("Fast advertising.");
            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
            APP_ERROR_CHECK(err_code);
            break; // BLE_ADV_EVT_FAST

        case BLE_ADV_EVT_IDLE:
            sleep_mode_enter();
            break; // BLE_ADV_EVT_IDLE

        default:
            break;
    }
}



static void delete_bonds(void)
{
    ret_code_t err_code;

    NRF_LOG_INFO("Erase bonds!");

    err_code = pm_peers_delete();
    APP_ERROR_CHECK(err_code);
}


static void advertising_init(void)
{
    uint32_t      err_code;
    ble_advdata_t advdata;
    ble_advdata_t scandata;
    uint8_t       flags = BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED;

    ble_advdata_manuf_data_t manuf_specific_data;

    manuf_specific_data.company_identifier = APP_COMPANY_IDENTIFIER;

#if defined(USE_UICR_FOR_MAJ_MIN_VALUES)

    uint16_t major_value = ((*(uint32_t *)UICR_ADDRESS) & 0xFFFF0000) >> 16;
    uint16_t minor_value = ((*(uint32_t *)UICR_ADDRESS) & 0x0000FFFF);

    uint8_t index = MAJ_VAL_OFFSET_IN_BEACON_INFO;

    m_beacon_info[index++] = MSB_16(major_value);
    m_beacon_info[index++] = LSB_16(major_value);

    m_beacon_info[index++] = MSB_16(minor_value);
    m_beacon_info[index++] = LSB_16(minor_value);
#endif

    manuf_specific_data.data.p_data = (uint8_t *) m_beacon_info;
    manuf_specific_data.data.size   = APP_BEACON_INFO_LENGTH;


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

    advdata.name_type             = BLE_ADVDATA_NO_NAME;
    advdata.flags                 = flags;
    advdata.p_manuf_specific_data = &manuf_specific_data;


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

    m_adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
    m_adv_params.p_peer_addr     = NULL;    
    m_adv_params.filter_policy   = BLE_GAP_ADV_FP_ANY;
    m_adv_params.interval        = NON_CONNECTABLE_ADV_INTERVAL;
    m_adv_params.duration        = 0;       

    err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
    APP_ERROR_CHECK(err_code);


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

    scandata.name_type             = BLE_ADVDATA_FULL_NAME;
    scandata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    scandata.uuids_complete.p_uuids  = m_adv_uuids;

    ble_gap_addr_t gap_address;
    gap_address.addr_type = BLE_GAP_ADDR_TYPE_PUBLIC;
    memcpy(&gap_address.addr, "\xbb\xaa\xcc\xbb\xaa\xAC", sizeof(gap_address.addr));
    err_code = sd_ble_gap_addr_set(&gap_address);
    APP_ERROR_CHECK(err_code);

    err_code = ble_advdata_encode(&scandata, m_adv_data.scan_rsp_data.p_data, &m_adv_data.scan_rsp_data.len);
    APP_ERROR_CHECK(err_code);

    err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &m_adv_params);
    APP_ERROR_CHECK(err_code);
}



static void advertising_start(bool erase_bonds)
{
    ret_code_t err_code;
    if (erase_bonds == true){
        delete_bonds();
        
    }
    else
    {
        err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
        APP_ERROR_CHECK(err_code);

        err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
        APP_ERROR_CHECK(err_code);
    }
    

    
}

///**@brief Function for initializing the Advertising functionality.
// *
// * @details Encodes the required advertising data and passes it to the stack.
// *          Also builds a structure to be passed to the stack when starting advertising.
// */
//static void advertising_init(void)
//{
//    ret_code_t             err_code;
//    ble_advertising_init_t init;
//
//    memset(&init, 0, sizeof(init));
//
//    init.advdata.name_type               = BLE_ADVDATA_FULL_NAME;
//    init.advdata.include_appearance      = true;
//    init.advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
//    init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
//    init.advdata.uuids_complete.p_uuids  = m_adv_uuids;
//
//    init.config.ble_adv_fast_enabled  = true;
//    init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
//    init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;
//
//    init.evt_handler = on_adv_evt;
//
//    err_code = ble_advertising_init(&m_advertising, &init);
//    APP_ERROR_CHECK(err_code);
//
//    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
//}



static void nrf_qwr_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}



static void qwr_init(void)
{
    ret_code_t         err_code;
    nrf_ble_qwr_init_t qwr_init_obj = {0};

 
    qwr_init_obj.error_handler = nrf_qwr_error_handler;

    err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init_obj);
    APP_ERROR_CHECK(err_code);
}



static void tps_init(void)
{
    ret_code_t     err_code;
    ble_tps_init_t tps_init_obj;

    memset(&tps_init_obj, 0, sizeof(tps_init_obj));
    tps_init_obj.initial_tx_power_level = TX_POWER_LEVEL;

    tps_init_obj.tpl_rd_sec = SEC_JUST_WORKS;

    err_code = ble_tps_init(&m_tps, &tps_init_obj);
    APP_ERROR_CHECK(err_code);
}



static void ias_init(void)
{
    ret_code_t     err_code;
    ble_ias_init_t ias_init_obj;

    memset(&ias_init_obj, 0, sizeof(ias_init_obj));
    ias_init_obj.evt_handler  = on_ias_evt;

    ias_init_obj.alert_wr_sec = SEC_JUST_WORKS;

    err_code = ble_ias_init(&m_ias, &ias_init_obj);
    APP_ERROR_CHECK(err_code);
}



static void lls_init(void)
{
    ret_code_t     err_code;
    ble_lls_init_t lls_init_obj;

    // Initialize Link Loss Service
    memset(&lls_init_obj, 0, sizeof(lls_init_obj));

    lls_init_obj.evt_handler         = on_lls_evt;
    lls_init_obj.error_handler       = service_error_handler;
    lls_init_obj.initial_alert_level = INITIAL_LLS_ALERT_LEVEL;

    lls_init_obj.alert_level_rd_sec = SEC_JUST_WORKS;
    lls_init_obj.alert_level_wr_sec = SEC_JUST_WORKS;

    err_code = ble_lls_init(&m_lls, &lls_init_obj);
    APP_ERROR_CHECK(err_code);
}



static void bas_init(void)
{
    ret_code_t     err_code;
    ble_bas_init_t bas_init_obj;

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

    bas_init_obj.evt_handler          = on_bas_evt;
    bas_init_obj.support_notification = true;
    bas_init_obj.p_report_ref         = NULL;
    bas_init_obj.initial_batt_level   = 100;

    bas_init_obj.bl_rd_sec        = SEC_OPEN;
    bas_init_obj.bl_cccd_wr_sec   = SEC_OPEN;
    bas_init_obj.bl_report_rd_sec = SEC_OPEN;

    err_code = ble_bas_init(&m_bas, &bas_init_obj);
    APP_ERROR_CHECK(err_code);
}



static void ias_client_init(void)
{
    ret_code_t       err_code;
    ble_ias_c_init_t ias_c_init_obj;

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

    m_is_high_alert_signalled = false;

    ias_c_init_obj.evt_handler   = on_ias_c_evt;
    ias_c_init_obj.error_handler = service_error_handler;

    err_code = ble_ias_c_init(&m_ias_c, &ias_c_init_obj);
    APP_ERROR_CHECK(err_code);
}



static void services_init(void)
{
    qwr_init();
    tps_init();
    ias_init();
    lls_init();
    bas_init();
    ias_client_init();
}



static void db_discovery_init(void)
{
    ret_code_t err_code = ble_db_discovery_init(db_disc_handler);
    APP_ERROR_CHECK(err_code);
}


static void conn_params_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}



static void conn_params_init(void)
{
    ret_code_t             err_code;
    ble_conn_params_init_t cp_init;

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

    cp_init.p_conn_params                  = NULL;
    cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
    cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
    cp_init.max_conn_params_update_count   = MAX_CONN_PARAMS_UPDATE_COUNT;
    cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID;
    cp_init.disconnect_on_fail             = true;
    cp_init.evt_handler                    = NULL;
    cp_init.error_handler                  = conn_params_error_handler;

    err_code = ble_conn_params_init(&cp_init);
    APP_ERROR_CHECK(err_code);
}



static void alert_signal(uint8_t alert_level)
{
    ret_code_t err_code;

    switch (alert_level)
    {
        case BLE_CHAR_ALERT_LEVEL_NO_ALERT:
            NRF_LOG_INFO("No Alert.");
            err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
            APP_ERROR_CHECK(err_code);
            break; // BLE_CHAR_ALERT_LEVEL_NO_ALERT

        case BLE_CHAR_ALERT_LEVEL_MILD_ALERT:
            NRF_LOG_INFO("Mild Alert.");
            err_code = bsp_indication_set(BSP_INDICATE_ALERT_0);
            APP_ERROR_CHECK(err_code);
            break; // BLE_CHAR_ALERT_LEVEL_MILD_ALERT

        case BLE_CHAR_ALERT_LEVEL_HIGH_ALERT:
            NRF_LOG_INFO("HIGH Alert.");
            err_code = bsp_indication_set(BSP_INDICATE_ALERT_3);
            APP_ERROR_CHECK(err_code);
            break; // BLE_CHAR_ALERT_LEVEL_HIGH_ALERT

        default:

            break;
    }
}



static void on_ias_evt(ble_ias_t * p_ias, ble_ias_evt_t * p_evt)
{
    switch (p_evt->evt_type)
    {
        case BLE_IAS_EVT_ALERT_LEVEL_UPDATED:
            if (p_evt->p_link_ctx != NULL)
            {
                alert_signal(p_evt->p_link_ctx->alert_level);
            }
            break; // BLE_IAS_EVT_ALERT_LEVEL_UPDATED

        default:
            // No implementation needed.
            break;
    }
}



static void on_lls_evt(ble_lls_t * p_lls, ble_lls_evt_t * p_evt)
{
    switch (p_evt->evt_type)
    {
        case BLE_LLS_EVT_LINK_LOSS_ALERT:
            alert_signal(p_evt->params.alert_level);
            break; // BLE_LLS_EVT_LINK_LOSS_ALERT

        default:
            // No implementation needed.
            break;
    }
}




static void on_ias_c_evt(ble_ias_c_t * p_ias_c, ble_ias_c_evt_t * p_evt)
{
    ret_code_t err_code;

    switch (p_evt->evt_type)
    {
        case BLE_IAS_C_EVT_DISCOVERY_COMPLETE:
            // IAS is found on peer. The Find Me Locator functionality of this app will work.
            err_code = ble_ias_c_handles_assign(&m_ias_c,
                                                p_evt->conn_handle,
                                                p_evt->alert_level.handle_value);
            APP_ERROR_CHECK(err_code);

            m_is_ias_present = true;
            break; // BLE_IAS_C_EVT_DISCOVERY_COMPLETE

        case BLE_IAS_C_EVT_DISCOVERY_FAILED:
            // IAS is not found on peer. The Find Me Locator functionality of this app will NOT work.
            break; // BLE_IAS_C_EVT_DISCOVERY_FAILED

        case BLE_IAS_C_EVT_DISCONN_COMPLETE:
            // Disable alert buttons
            m_is_ias_present = false;
            break; // BLE_IAS_C_EVT_DISCONN_COMPLETE

        default:
            break;
    }
}



static void on_bas_evt(ble_bas_t * p_bas, ble_bas_evt_t * p_evt)
{
    ret_code_t err_code;

    switch (p_evt->evt_type)
    {
        case BLE_BAS_EVT_NOTIFICATION_ENABLED:
            // Start battery timer
            err_code = app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL);
            APP_ERROR_CHECK(err_code);
            break; // BLE_BAS_EVT_NOTIFICATION_ENABLED

        case BLE_BAS_EVT_NOTIFICATION_DISABLED:
            err_code = app_timer_stop(m_battery_timer_id);
            APP_ERROR_CHECK(err_code);
            break; // BLE_BAS_EVT_NOTIFICATION_DISABLED

        default:
            // No implementation needed.
            break;
    }
}



static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
    ret_code_t err_code = NRF_SUCCESS;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_DISCONNECTED:
            NRF_LOG_INFO("Disconnected.");
            // LED indication will be changed when advertising starts.
            break;

        case BLE_GAP_EVT_CONNECTED:
        {
            NRF_LOG_INFO("Connected.");
            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
            APP_ERROR_CHECK(err_code);

            // Assign connection handle to the Queued Write module.
            err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, p_ble_evt->evt.gap_evt.conn_handle);
            APP_ERROR_CHECK(err_code);

            // Discover peer's services.
            err_code = ble_db_discovery_start(&m_ble_db_discovery,
                                              p_ble_evt->evt.gap_evt.conn_handle);
            APP_ERROR_CHECK(err_code);
        } break;

        case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
        {
            NRF_LOG_DEBUG("PHY update request.");
            ble_gap_phys_t const phys =
            {
                .rx_phys = BLE_GAP_PHY_AUTO,
                .tx_phys = BLE_GAP_PHY_AUTO,
            };
            err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
            APP_ERROR_CHECK(err_code);
        } break;

        case BLE_GATTC_EVT_TIMEOUT:
            // Disconnect on GATT Client timeout event.
            NRF_LOG_DEBUG("GATT Client Timeout.");
            err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTS_EVT_TIMEOUT:
            // Disconnect on GATT Server timeout event.
            NRF_LOG_DEBUG("GATT Server Timeout.");
            err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
            break;

        default:
            // No implementation needed.
            break;
    }
}



static void ble_stack_init(void)
{
    ret_code_t err_code;

    err_code = nrf_sdh_enable_request();
    APP_ERROR_CHECK(err_code);

    // Configure the BLE stack using the default settings.
    // Fetch the start address of the application RAM.
    uint32_t ram_start = 0;
    err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
    APP_ERROR_CHECK(err_code);

    // Enable BLE stack.
    err_code = nrf_sdh_ble_enable(&ram_start);
    APP_ERROR_CHECK(err_code);

    // Register a handler for BLE events.
    NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}


static void peer_manager_init(void)
{
    ble_gap_sec_params_t sec_param;
    ret_code_t           err_code;

    err_code = pm_init();
    APP_ERROR_CHECK(err_code);

    memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));

    // Security parameters to be used for all security procedures.
    sec_param.bond           = SEC_PARAM_BOND;
    sec_param.mitm           = SEC_PARAM_MITM;
    sec_param.lesc           = SEC_PARAM_LESC;
    sec_param.keypress       = SEC_PARAM_KEYPRESS;
    sec_param.io_caps        = SEC_PARAM_IO_CAPABILITIES;
    sec_param.oob            = SEC_PARAM_OOB;
    sec_param.min_key_size   = SEC_PARAM_MIN_KEY_SIZE;
    sec_param.max_key_size   = SEC_PARAM_MAX_KEY_SIZE;
    sec_param.kdist_own.enc  = 1;
    sec_param.kdist_own.id   = 1;
    sec_param.kdist_peer.enc = 1;
    sec_param.kdist_peer.id  = 1;

    err_code = pm_sec_params_set(&sec_param);
    APP_ERROR_CHECK(err_code);

    err_code = pm_register(pm_evt_handler);
    APP_ERROR_CHECK(err_code);
}



static void bsp_event_handler(bsp_event_t event)
{
    ret_code_t err_code;

    switch (event)
    {
        case BSP_EVENT_SLEEP:
            sleep_mode_enter();
            break;

        case BSP_EVENT_DISCONNECT:
            err_code = sd_ble_gap_disconnect(m_ias_c.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            if (err_code != NRF_ERROR_INVALID_STATE)
            {
                APP_ERROR_CHECK(err_code);
            }
            break;

        case BSP_EVENT_KEY_0:
        {
            if (m_is_ias_present)
            {
                if (!m_is_high_alert_signalled)
                {
                    err_code =
                        ble_ias_c_send_alert_level(&m_ias_c, BLE_CHAR_ALERT_LEVEL_HIGH_ALERT);
                }
                else
                {
                    err_code = ble_ias_c_send_alert_level(&m_ias_c, BLE_CHAR_ALERT_LEVEL_NO_ALERT);
                }

                if (err_code == NRF_SUCCESS)
                {
                    m_is_high_alert_signalled = !m_is_high_alert_signalled;
                }
                else if (
                    (err_code != NRF_ERROR_RESOURCES)
                    &&
                    (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
                    &&
                    (err_code != NRF_ERROR_NOT_FOUND)
                        )
                {
                    APP_ERROR_HANDLER(err_code);
                }
            }
        } break;

        case BSP_EVENT_KEY_1:
            NRF_LOG_INFO("Alert Off.");
            err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
            APP_ERROR_CHECK(err_code);
            break;

        default:
            break;
    }
}



static void buttons_leds_init(bool * p_erase_bonds)
{
    ret_code_t err_code;
    bsp_event_t startup_event;

    err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_btn_ble_init(NULL, &startup_event);
    APP_ERROR_CHECK(err_code);

    *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}



static void log_init(void)
{
    ret_code_t err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEFAULT_BACKENDS_INIT();
}



static void power_management_init(void)
{
    ret_code_t err_code;
    err_code = nrf_pwr_mgmt_init();
    APP_ERROR_CHECK(err_code);
}



static void idle_state_handle(void)
{
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}



///**@brief Function for starting advertising.
// */
//static void advertising_start(bool erase_bonds)
//{
//    if (erase_bonds == true){
//        delete_bonds();
//        // Advertising is started by PM_EVT_PEERS_DELETE_SUCEEDED event.
//    }
//    else
//    {
//        uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
//
//        APP_ERROR_CHECK(err_code);
//    }
//}



static void tx_power_set(void)
{
    ret_code_t err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, TX_POWER_LEVEL);
    APP_ERROR_CHECK(err_code);
}


int main(void)
{
    bool erase_bonds;

    // Initialize.
    log_init();
    timers_init();
    buttons_leds_init(&erase_bonds);
    power_management_init();
    ble_stack_init();
    adc_configure();
    gap_params_init();
    gatt_init();
    advertising_init();
    db_discovery_init();
    services_init();
    conn_params_init();
    peer_manager_init();

    // Start execution.
    NRF_LOG_INFO("Proximity example started.");
    advertising_start(erase_bonds);
    tx_power_set();

    // Enter main loop.
    for (;;)
    {
        idle_state_handle();
    }
}

thank you

[Einar Thorsrud]

Hi,

1. You should change it in the set_raw_initial_whitelist() I wrote. Note that this is just a demonstration of how you can do it. It works, but you probably want to adjust it somewhat to your specific needs.

2. Yes, using whitelist all devices will see the advertising. But only the whitelisted peer(s) will be allowed to connect.

[Naralasetty Praneeth]

HI @Einar Thorsrud,

but i need my beacon to advertise and connect to only the device which we can change in code. It should not advertise to other devices which were not mentioned in the code

[Einar Thorsrud]

OK, then you are back at the directed advertising again...

But I am really interested in knowing why you want to do that. What is your use case? Why do you not want others to see the advertisements? Do you think there is any inherent security in directed advertisements (it is not, the packet is still visible on air to anyone wanting to observe it)? My colleague also attempted to ask about it in this thread.

[Naralasetty Praneeth]

HI @Einar Thorsrud,

my project is to advertise a beacon where the battery level and major&minor values, uuid values are detected and read by android/ios app

so now i have a specific beacon which advertises with all battery level and major,minor value,uuid values and mac address.....now if an other person changes his beacon values same as my beacon values and mac address....the app will detect the both beacons at a time....so for this reason i want to advertise to specific device where the mac address of phone was kept in the code and my beacon advertise to the android/ios app in my phone only

so for this purpose what should i do?

[Einar Thorsrud]

Hi,

I see. But your solution with using direct advertisements does not seem sane to me, and it does not provide any security. It is easy for an attacker to make an advertisement packet with the same destination MAC address (though it will only be valid until it is changed).

I have more questions in order to try to understand this:

• Why don't you just filter on the beacon address you are after on the Android phone instead? That does not use privacy, so you can filter on the same MAC all the time. No need to think about getting your hands on 1an IRK.
• Do you have a requirement not to bond, or do you indent to use bonding?
  • If you don't bond, how do you intend to get the IRK from the android phone?
  • (And if you do bond, then everything is handled for you by the Peer manager library.)
• Do you need to securely transfer information from the "beacon" to the phone? If so, the only option is to use a connection. 
• Or are you just afraid for another beacon accidentally having the same MAC address? If so, then know that the likelihood of this happening is very small. And if you are afraid of a malicious attacker, then using direct advertisements does not help at all.