RE: Set UUID in Advertising Data in Peripheral LBS

TysonYee — Wed, 13 Apr 2022 23:01:44 GMT

Hi Kazi,

Thank you for the response, simply changing the BT_DATA function calls between the advertising packet and scan response was the solution.

Cheers,

Tyson

RE: Set UUID in Advertising Data in Peripheral LBS

Kazi Afroza Sultana — Wed, 13 Apr 2022 14:07:10 GMT

Hello Tyson,

I think it is possible to set UIID and device name of the service as advertising data. We have an introductory tutorial for Bluetooth Low Energy you can look at GitHub - edvinand/custom_ncs_ble_service_sample. It shows how to add the device name and the UUID of the service in advertising data-

For example in the below code snippet, it shows the device name that is set in the config file, how it is applied in advertising packet inside ad[] and inside scan response packet sd[] , how randomly generated UUID is added. So when we want to advertise both of these , we can start advertising from bluetooth_init() after the bt_init_ok semaphore has been taken.

#define DEVICE_NAME CONFIG_BT_DEVICE_NAME
#define DEVICE_NAME_LEN (sizeof(DEVICE_NAME)-1)


static const struct bt_data ad[] = {
    BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)),
    BT_DATA(BT_DATA_NAME_COMPLETE, DEVICE_NAME, DEVICE_NAME_LEN)
};

static const struct bt_data sd[] = {
    BT_DATA_BYTES(BT_DATA_UUID128_ALL, BT_UUID_REMOTE_SERV_VAL),
};

int bluetooth_init(struct bt_conn_cb *bt_cb, struct bt_remote_service_cb *remote_cb)
{
int err;
LOG_INF("Initializing Bluetooth");

if (bt_cb == NULL || remote_cb == NULL) {
return NRFX_ERROR_NULL;
}
bt_conn_cb_register(bt_cb);
remote_service_callbacks.notif_changed = remote_cb->notif_changed;
remote_service_callbacks.data_received = remote_cb->data_received;

err = bt_enable(bt_ready);
if (err) {
LOG_ERR("bt_enable returned %d", err);
return err;
}

k_sem_take(&bt_init_ok, K_FOREVER);

err = bt_le_adv_start(BT_LE_ADV_CONN, ad, ARRAY_SIZE(ad), sd, ARRAY_SIZE(sd));
if (err){
LOG_ERR("couldn't start advertising (err = %d", err);
return err;
}

return err;
}

You can look at this tutorial and try to implement similar way in your project. Let us know the outcome.

Thanks.

Best Regards,

Kazi Afroza Sultana