Random advertising data

RE: Random advertising data

smackenzie — Mon, 27 Dec 2021 22:04:49 GMT

What device is this application running on?

I would guess the app is adding the number to the end based on duplicate mac addresses or names.

You can verify the number is not included in the atcual advertisement data using both the nrfconnect phone application, and also double-checking with the "Bluetooth Low Energy" app in nrfconnect for desktop.

RE: Random advertising data

JohnCC — Mon, 27 Dec 2021 06:15:24 GMT

Hi,

Because this app was not developed by us. So I don’t know. I just want to find out where the numbers captured by the app are?

Thank you.

john.

RE: Random advertising data

smackenzie — Sun, 26 Dec 2021 03:34:01 GMT

Is it possible that the device you are using to scan for these devices is adding the number to the end of the name?

RE: Random advertising data

JohnCC — Fri, 24 Dec 2021 02:12:41 GMT

Hi,

Also, the max data allowed in an advertisement packet is 31, but you are attempting to add at least 34. ->I don't know what it means. Should I need to change some thing for my code?

I try to change name type from FULL to SHORT and set SHORT length is 3. But this app is showing "Bry 22". this number still exist.

Thank you.

John.

RE: Random advertising data

smackenzie — Thu, 23 Dec 2021 22:28:59 GMT

It dosent seem you are actually setting the name of your device to `DEVICE_NAME`.

Also, the max data allowed in an advertisement packet is 31, but you are attempting to add at least 34.

RE: Random advertising data

JohnCC — Thu, 23 Dec 2021 05:20:20 GMT

Hi,

Below is my code about adverting data

#define DEVICE_NAME                     "Bryton Trainer"                               /**< Name of device. Will be included in the advertising data. */

static void advertising_init(void)
{
    int32_t   err_code;
    ble_advertising_init_t init;


    ble_uuid_t m_adv_uuids[] = {{BLE_UUID_CYCLING_POWER,  BLE_UUID_TYPE_BLE},
                               {BLE_UUID_FITNESS_MACHINE, BLE_UUID_TYPE_BLE}};

    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_GENERAL_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_TIMEOUT_IN_SECONDS;

    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);
}

So, nrf_connect will show the SHORT_LOCAL_NAME, is it right?

Thank you.

John.

RE: Random advertising data

smackenzie — Thu, 23 Dec 2021 02:53:29 GMT

How are you adding the name to the advertisement data?

Is the app possibly displaying the FULL_LOCAL_NAME where nrfconnect is showing the SHORT_LOCAL_NAME?

RE: Random advertising data

JohnCC — Thu, 23 Dec 2021 02:09:09 GMT

Hi lared,

I don't use sniffer to get data. I just want to know a possible solution

I can wait. Thank you.

John.

RE: Random advertising data

Jared — Wed, 22 Dec 2021 12:53:05 GMT

Hi,

Have you tried checking the actual advertising data with a sniffer trace? Does it contain this number?

We're currently short on staff due to the Holiday season. Expect some delay in the handling of this case.

regards

Jared