nrf52840 ble advertisement initialize parameters in ble stack

[Yogeshwaran]

i am working on ble_app_beacon example and i am facing issues in evt_handler. basically i want to use on_adv_evt() function to put my device in sleep mode after timeout hence i copied the function and used in app_beacon example but in the evt handler function is not executing anymore.i want to know if we are initializing ble_advertisement_t parameters in advertisement_init() function then where exactly these parameters are updated in ble_stack, what function is used to register ble_advertisement_t structure into stack. Because of these parameters were not registered the evt_handler is not called.

In ble_app_uart()  they were calling ble_advertisement_init() function and it takes care of all configurations, but if use the same function by creating the BLE_ADVERTISE_DEF i am getting error in sdk_config.h as expected ')' before  '1' (#define BLE_ADV_BLE_OBSERVER_PRIO 1).

static void advertising_init(void)
{
    uint32_t      err_code;

     ble_advertising_init_t init;

    memset(&init, 0, sizeof(init));
    ble_advdata_t advdata;
    uint8_t       flags = /*BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED;*/ BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

    ble_advdata_manuf_data_t manuf_specific_data;

    manuf_specific_data.company_identifier = APP_COMPANY_IDENTIFIER;


     init.config.ble_adv_fast_enabled  = true;
    init.config.ble_adv_fast_interval = 64;
    init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;
    init.evt_handler = on_adv_evt;
    
    manuf_specific_data.data.p_data = (uint8_t *) m_beacon_info;
    manuf_specific_data.data.size   = APP_BEACON_INFO_LENGTH;

    // Build and set advertising data.
    memset(&advdata, 0, sizeof(advdata));
 //ble_gap_adv_params_t adv_params;
    advdata.name_type             = BLE_ADVDATA_NO_NAME;
    advdata.flags                 = flags;
    advdata.p_manuf_specific_data = &manuf_specific_data;

    // Initialize advertising parameters (used when starting advertising).
    memset(&m_adv_params, 0, sizeof(m_adv_params));

    m_adv_params.properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;
    m_adv_params.p_peer_addr     = NULL;    // Undirected advertisement.
    m_adv_params.filter_policy   = BLE_GAP_ADV_FP_ANY;
    m_adv_params.interval        = NON_CONNECTABLE_ADV_INTERVAL;
    m_adv_params.duration        = APP_ADV_DURATION;       // Never time out.
   
    err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_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);

The above code was from ble_app_beacon. i want to understand whether on_adv_evt will be called or not according to the above code?

[Jared]

Hi,

The beacon example in the SDK is a simple example that only sets up advertising in non-connectable mode. You should define APP_BLE_OBSERVER_PRIO and register a handler for the events with NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);

A simpler approach then starting with the beacon example would be to start with the blinky example (or any other example that use ble events) and then change it so it advertises in non-connectable mode. 

Best regards

Jared