Custom 128bits UUID

RE: Custom 128bits UUID

Nikita — Thu, 23 Oct 2014 06:41:21 GMT

What is BLE_UUID_SP_DATA_TYPE and BLE_UUID_SP_CMD_TYPE? Is it pointers to uuid_type from sd_ble_uuid_vs_add() call?

When I'm using it for the ble_advdata_set() the device is not found by scanning.

I think the problem may be that you have exceeded maximum advertising packet size and ble_advdata_set() call return an error and device reset from APP_ERROR_CHECK(err_code);. Check your app_error_handler() function.

RE: Custom 128bits UUID

eli — Wed, 22 Oct 2014 21:07:51 GMT

Hi, I do the same thing, using the uuit_base_type that had been generated by the sd_ble_uuid_vs_add(). When I'm using it for the ble_advdata_set() the device is not found by scanning. If I am changing the uuid type only in the advertising function, to BLE_UUID_TYPE_BLE only then I can see the device. It is very strange that all the characteristics and uuid nationalizations are done with the custom type nut the advertising function doesn't like it.

RE: Custom 128bits UUID

eli — Wed, 22 Oct 2014 18:13:17 GMT

Yes it works, but the question is how I make the advertising ble_advdata_set() with 128 uuid? please take a look at the advertising_init(). I am trying to advertise two services, when I am setting the UUID's types to BLE_UUID_TYPE_VENDOR_BEGIN or the type I got from sd_ble_uuid_vs_add(), I cannot find the device at all. I works only with the BLE_UUID_TYPE_BLE.

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

// YOUR_JOB: Use UUIDs for service(s) used in your application.
//ble_uuid_t adv_uuids[] = {{BLE_UUID_SP_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN}};
  ble_uuid_t adv_uuids[] = {
				{BLE_UUID_SP_DATA_SERVICE,    BLE_UUID_SP_DATA_TYPE},
				{BLE_UUID_SP_CMD_SERVICE,     BLE_UUID_SP_CMD_TYPE}};

// Build and set advertising data
memset(&advdata, 0, sizeof(advdata));

advdata.name_type               = BLE_ADVDATA_FULL_NAME;
advdata.include_appearance      = true;
advdata.flags.size              = sizeof(flags);
advdata.flags.p_data            = &flags;
advdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
advdata.uuids_complete.p_uuids  = adv_uuids;

err_code = ble_advdata_set(&advdata, NULL);
APP_ERROR_CHECK(err_code);

}

RE: Custom 128bits UUID

Nikita — Wed, 22 Oct 2014 07:16:52 GMT

You can to set custom service UUID like this:

uint32_t ble_cs_init(ble_cs_t * p_cs, const ble_cs_init_t * p_cs_init)
{
    ble_uuid128_t   cs_base_uuid = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
                                    0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF};
...
    // Add custom base UUID.
    err_code = sd_ble_uuid_vs_add(&cs_base_uuid, &p_cs->uuid_type);
    if (err_code != NRF_SUCCESS)
    {
        return err_code;
    }

    ble_uuid.type = p_cs->uuid_type;
    ble_uuid.uuid = BLE_UUID_CS_SERVICE;
    // Add service.
    err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
                                        &ble_uuid,
                                        &p_cs->service_handle);
    /**@snippet [Adding proprietary Service to S110 SoftDevice] */
    if (err_code != NRF_SUCCESS)
    {
        return err_code;
    }
    // Add Characteristics.
...
}

UPD:

To add your custom service UUID to advertising packets you need to do this:

In ble_cs.h:

#define BLE_UUID_CS_SERVICE            0x0001                       /**< The UUID of the Custom Service. */
#define BLE_UUID_CS_TX_CHARACTERISTIC  0x0002                       /**< The UUID of the TX Characteristic. */
#define BLE_UUID_CS_RX_CHARACTERISTIC  0x0003                       /**< The UUID of the RX Characteristic. */

In main.c:

static ble_cs_t                          m_cs;                                          /**< Structure to identify the Custom Service. */

static void advertising_init(uint8_t adv_flags)
{
    uint32_t      err_code;
    ble_advdata_t advdata;

    ble_uuid_t adv_uuids[] = 
    {
        {BLE_UUID_CS_SERVICE,                    m_cs.uuid_type}
    };
...
    advdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
    advdata.uuids_complete.p_uuids  = adv_uuids;
    err_code = ble_advdata_set(&advdata, 0);
...
}

static void services_init(void)
{
    uint32_t          err_code;
    ble_cs_init_t     cs_init;
...
    memset(&cs_init, 0, sizeof(cs_init));

    cs_init.data_handler = cs_data_handler;
    cs_init.initial_tx_char_val = a_send_onoff_mode;
    
    err_code = ble_cs_init(&m_cs, &cs_init);
    APP_ERROR_CHECK(err_code);
}