How to set Service UUID for central and peripheral

[roger.k]

Hi. I'm using nRF51822AC, SDK12.2.0, S130 as central and peripheral.

Q1. What's "sd_ble_uuid_vs_add" function? is it for setting service UUID? Q2. If Q1 yes, how to change service uuid?

for example) I want to set service uuid as below.

For central : #define LBS_UUID_BASE {0x23, 0xD1, 0xBC, 0xEA, 0x5F, 0x78, 0x23, 0x15,
0xDE, 0xEF, 0x12, 0x12, 0x00, 0x00, 0x00, 0x00}

For periphral : #define p_BASE_UUID {0x00, 0x00, 0x00, 0x30, 0x52, 0xD0, 0x00, 0x00, 0, 1, 2, 3, 4, 5, 6, 7}

and I made source code as below. ......

ble_uuid128_t lbs_base_uuid = {LBS_UUID_BASE};

err_code = sd_ble_uuid_vs_add(&lbs_base_uuid, &p_ble_lbs_c->uuid_type);
if (err_code != NRF_SUCCESS)
{
    return err_code;
}
VERIFY_SUCCESS(err_code);

......

ble_uuid128_t p_base_uuid = p_BASE_UUID;
err_code = sd_ble_uuid_vs_add(&p_base_uuid, &p_m_p->uuid_type);
if (err_code != NRF_SUCCESS)
{
    return err_code;
}
VERIFY_SUCCESS(err_code);

But it's service UUID in advertising data is LBS_UUID_BASE.

How can I set p_BASE_UUID in advertising data?

I need your help.

[Jørgen Holmefjord]

Hi,

The function sd_ble_uuid_vs_add() is described in the infocenter. The UUIDs in the stack is not put into the advertising data by default, you have to add it yourself.

If you application advertise the LBS UUID and you are using one of the examples from the SDK (ble_app_blinky?), it is most likely added to the advertising data in advertising_init() function. You can have a look at the ble_app_uart example, as this shows how to advertise a custom UUID.

If you connect to your peripheral and perform a service discovery, do you see your custom service?

Best regards,

Jørgen

[Jørgen Holmefjord]

The Nordic UART Service is a 128-bit vendor-specific UUID, as described in example documentation in the infocenter. The base UUID, NUS_BASE_UUID, is defined in ble_nus.c. This is added to the stack in services_init() with a call to sd_ble_uuid_vs_add(). When the UUID is added to the advertising data, the NUS_SERVICE_UUID_TYPE is used to get the base UUID from the stack.