RE: Getting advertisement UUID changed...

Sigurd — Fri, 17 Jul 2020 14:39:16 GMT

[quote user="Urvisha Andani"]it is not fix every time it changed[/quote]

That is very strange.I have not been able to reproduce this. Do you see other issues/bugs when this happens ?
Do you see the same issue if you test it on a nRF51-DK ?

Could you create a small example that reproduces this behavior?

RE: Getting advertisement UUID changed...

Urvisha Andani — Tue, 14 Jul 2020 05:34:45 GMT

[quote userid="15146" url="~/f/nordic-q-a/63692/getting-advertisement-uuid-changed/259721"] Could you post the code you used to set the service UUID in the advertisement packet?[/quote]

yes, i mention below,

#define SDS_UUID_BASE {0xF4, 0xE7, 0xA4, 0xCF, 0xCD, 0xA2, 0x48, 0xB6, \
                                           0xBD, 0x4C, 0xD8, 0x6F, 0x00, 0x00, 0xE7, 0x7E}
#define SDS_UUID_SERVICE         0xE1FA

#define SDS_UUID_DATA_FLAG_CHAR  0x2AD1
#define SDS_UUID_SERIAL_NUMBER   0x2A14
#define SDS_UUID_MAX_ADC         0x2A16
#define SDS_UUID_MIN_ADC         0x2A17

also i mention advertisement initialization function,

#define APP_FAST_ADV_INTERVAL                480                                         /**< The advertising interval (in units of 0.625 ms. This value corresponds to 300 ms). */
#define APP_FAST_ADV_TIMEOUT_IN_SECONDS      60                                         /**< The advertising timeout (in units of seconds). */

static ble_uuid_t m_adv_uuids[] = {{SDS_UUID_SERVICE, BLE_UUID_TYPE_VENDOR_BEGIN}}; /**< Universally unique service identifiers. */


static void advertising_init(void)
{
    uint32_t               err_code;
    ble_advdata_t          advdata;
    ble_adv_modes_config_t options;

    // Build advertising data struct to pass into @ref ble_advertising_init.
    memset(&advdata, 0, sizeof(advdata));

    advdata.name_type               = BLE_ADVDATA_FULL_NAME;
    advdata.include_appearance      = false;
    advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
    advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    advdata.uuids_complete.p_uuids  = m_adv_uuids;

    memset(&options, 0, sizeof(options));
    options.ble_adv_fast_enabled  = true;
    options.ble_adv_fast_interval = APP_FAST_ADV_INTERVAL;
    options.ble_adv_fast_timeout  = APP_FAST_ADV_TIMEOUT_IN_SECONDS;
    
    err_code = ble_advertising_init(&advdata, NULL, &options, on_adv_evt, NULL);
    APP_ERROR_CHECK(err_code);
}

[quote userid="15146" url="~/f/nordic-q-a/63692/getting-advertisement-uuid-changed/259721"]What was the original value ? What did it change to?[/quote]

original value is : 0x7EE7E1FA-6FD8-4CBD-B648-A2CDCFA4E7F4

Advertisement UUID getting changed in this case in UUID was : 0x7EE71399-6FD8-4CBD-B648-A2CDCFA4E7F4 and it is not fix every time it changed.

RE: Getting advertisement UUID changed...

Sigurd — Mon, 13 Jul 2020 14:27:37 GMT

Hi,

[quote user=""]When I add one more characteristic in my application but after that in the advertisement UUID getting changed.[/quote]

Could you post the code you used to set the service UUID in the advertisement packet?

[quote user=""]what is the reason of advertisement UUID getting changed?[/quote]

What was the original value ? What did it change to?