Failing to advertise Nordic UART Service

[la-ble]

S110 v8.0.0

SDK v8.0.0

ble_app_uart example

I first initialize the services and then initialize advertising. Everything works fine when I do NOT advertise the nus. As soon as I comment that code back in, the firmware seems to crash. I've noticed before crashing m_nus.uuid_type is 0x3 which is NOT in ble_types.h:

/** @defgroup BLE_UUID_TYPES Types of UUID
 * @{ */
#define BLE_UUID_TYPE_UNKNOWN       0x00 /**< Invalid UUID type. */
#define BLE_UUID_TYPE_BLE           0x01 /**< Bluetooth SIG UUID (16-bit). */
#define BLE_UUID_TYPE_VENDOR_BEGIN  0x02 /**< Vendor UUID types start at this index (128-bit). */
/** @} */

My functions:

static ble_nus_t m_nus;

static void OnNusDataReceived(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length) {
  ble_nus_string_send(p_nus, p_data, length);
}

static void my_services_init(void) {
  uint32_t err_code;
  ble_nus_init_t nus_init;

  // Initialize the Nordic UART Service
  memset(&nus_init, 0, sizeof(nus_init));
  nus_init.data_handler = OnNusDataReceived;
  err_code = ble_nus_init(&m_nus, &nus_init);
  APP_ERROR_CHECK(err_code);
}

static void my_advertising_init(void) {
  uint32_t err_code;
  ble_advdata_t advdata;
  ble_advdata_t scanrsp;

  ble_uuid_t adv_uuids[] = {
    {BLE_UUID_NUS_SERVICE, m_nus.uuid_type}
    //{BLE_UUID_NUS_SERVICE, BLE_UUID_TYPE_UNKNOWN}
    //{BLE_UUID_NUS_SERVICE, BLE_UUID_TYPE_BLE}
    //{BLE_UUID_NUS_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN}
  };

  // Build and set advertising data
  memset(&advdata, 0, sizeof(advdata));
  advdata.name_type               = BLE_ADVDATA_FULL_NAME;
  advdata.include_appearance      = true;
  advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
  
  memset(&scanrsp, 0, sizeof(scanrsp));
  scanrsp.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
  scanrsp.uuids_complete.p_uuids  = adv_uuids;
  
  err_code = ble_advdata_set(&advdata, &scanrsp);
  APP_ERROR_CHECK(err_code);
  
  // Initialize advertising parameters (used when starting advertising)
  memset(&m_adv_params, 0, sizeof(ble_gap_adv_params_t));
  m_adv_params.type        = BLE_GAP_ADV_TYPE_ADV_IND;
  m_adv_params.p_peer_addr = NULL; // Undirected advertisement.
  m_adv_params.fp          = BLE_GAP_ADV_FP_ANY;
  m_adv_params.interval    = APP_ADV_INTERVAL;
  m_adv_params.timeout     = APP_ADV_TIMEOUT_IN_SECONDS;
}

[Ulrich Myhre]

I see you got your response, but I just want to add that BLE_UUID_TYPE_VENDOR_BEGIN is the index of the first vendor-specific UUID you add. Consecutive VS-UUIDs added will continue to count upwards from this number. If you want to send a request, or receive a response with one of the VS-UUIDs you added, the stack will set the type to the value you got earlier. This means you need to store the ID you got from the stack somewhere if you want to know which VS-UUID this response contained.