Handling of mixed Advertising and Extended Advertising

[axel_s]

Hallo,

currently I test several options in regarding the use of advertising. I have a few nRF52840-DK and use Zephyr 2.7-99 and ncs. I have a question regarding combined use of extended advertising and "simple" advertising.

I create an advertising set with bt_le_ext_adv_create(..). Than, I set my transmit data with bt_le_ext_adv_set_data(..), start extended advertising with bt_le_ext_adv_start(..) and stop it after a few transmits with bt_le_ext_adv_stop(..). After a while I do the cycle bt_le_ext_adv_set_data(..) - bt_le_ext_adv_start(..) - bt_le_ext_adv_stop(..) again, and so on. This runs well, no problems. Now I want to use the pause between this cycles to start a simple advertising with bt_le_adv_start(..). Here I saw an error (-12 - not enough memory). I found that I have to delete the advertising set with bt_le_ext_adv_delete(..).

I wonder why I see such a behaviour. It's quite clear that I can't have two different advertising schemes running at the same time. But my extended advertising doesn't run, it is stopped. The advertising set is in my mind just a "collection" of parameters regarding the extended advertising, which is stored in the memory. Furthermore, as far as I understood the functions, I can have a number of advertising sets and pick up one of them when starting extended advertising. So the stack should be able to handle several advertising sets. But why can I not start a simple advertising, when an advertising set exists? The set isn't touched, and the simple advertising doesn't need one.

Kind regards

Axel

[lara]

hi

i followed all steps that u have told here.but still iam facing enomem error...

err = bt_le_ext_adv_stop(adv);

if (err) {

    printk("Failed to stop advertising (err %d)\n", err);

} else {

    printk("Advertising stopped successfully\n");

}

bt_le_ext_adv_delete(adv);

/*

struct bt_le_adv_param param = {

    .id = BT_ID_DEFAULT,

    .sid = 0,

    .secondary_max_skip = 0,

    .options = BT_LE_ADV_OPT_EXT_ADV | BT_LE_ADV_OPT_CONNECTABLE,

    .interval_min = params.interval/0.625,  

    .interval_max = params.interval/0.625,

    .peer = NULL,

};

*/

struct bt_le_adv_param param =

        BT_LE_ADV_PARAM_INIT(BT_LE_ADV_OPT_EXT_ADV | BT_LE_ADV_OPT_CONNECTABLE,

                     3000,

                     3000,

                     NULL);

    // Update advertising data

    struct bt_data ad[] = {

        BT_DATA(BT_DATA_NAME_COMPLETE, name_buffer, DEVICE_NAME_LEN),

         BT_DATA_BYTES(BT_DATA_FLAGS, BT_LE_AD_NO_BREDR),

        BT_DATA(BT_DATA_MANUFACTURER_DATA, manufacturer_data, sizeof(manufacturer_data)),

        BT_DATA(BT_DATA_MANUFACTURER_DATA, adv_data, sizeof(adv_data)),  

    };

    // Start advertising with updated data

     err = bt_le_ext_adv_create(&param, NULL, &adv);

    if (err) {

        printk("Failed to create advertising set (err %d)\n", err);

        return err;

    }

    err = bt_le_ext_adv_set_data(adv, ad, ARRAY_SIZE(ad), NULL, 0);

    if (err) {

        printk("Failed to set advertising data (err %d)\n", err);

        return 0;

    }

   

set_tx_power(BT_HCI_VS_LL_HANDLE_TYPE_ADV, 0, 8);

    err = bt_le_ext_adv_start(adv, &start_params);

    if (err) {

        printk("Failed to start extended advertising (err %d)\n", err);

    }

    else

    {

    printk("Advertising successfully started\n");

    }