Multiple service in one platform (HID + LBS)

RE: Multiple service in one platform (HID + LBS)

Joakim Jakobsen — Thu, 25 Jul 2019 07:40:27 GMT

There is an example of an implementation of the LBS-service in our ble_app_blinky example. I suggest that you take a look at how it's done there.

Best regards,
Joakim

RE: Multiple service in one platform (HID + LBS)

CY — Tue, 23 Jul 2019 01:42:43 GMT

Hi Joakim,

It cannot advertise after remove the LBS uuid.

I need to remove lbs_init() in the service_inti() that I could start advertising but without lbs function.

And I have looked into the ble_lbs_init() and found the parameter related to uuid128bit.

Thus, I would like to know how to revise the setting below to meet the 16-bit UUID service, is it possible?

uint32_t ble_lbs_init(ble_lbs_t * p_lbs, const ble_lbs_init_t * p_lbs_init)
{
    uint32_t              err_code;
    ble_uuid_t            ble_uuid;
    ble_add_char_params_t add_char_params;

    // Initialize service structure.
    p_lbs->led_write_handler = p_lbs_init->led_write_handler;

    // Add service.
    ble_uuid128_t base_uuid = {LBS_UUID_BASE};
    err_code = sd_ble_uuid_vs_add(&base_uuid, &p_lbs->uuid_type);
    VERIFY_SUCCESS(err_code);

    ble_uuid.type = p_lbs->uuid_type;
    ble_uuid.uuid = LBS_UUID_SERVICE;

    err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_lbs->service_handle);
    VERIFY_SUCCESS(err_code);

    // Add Button characteristic.
    memset(&add_char_params, 0, sizeof(add_char_params));
    add_char_params.uuid              = LBS_UUID_BUTTON_CHAR;
    add_char_params.uuid_type         = p_lbs->uuid_type;
    add_char_params.init_len          = sizeof(uint8_t);
    add_char_params.max_len           = sizeof(uint8_t);
    add_char_params.char_props.read   = 1;
    add_char_params.char_props.notify = 1;

    add_char_params.read_access       = SEC_OPEN;
    add_char_params.cccd_write_access = SEC_OPEN;

    err_code = characteristic_add(p_lbs->service_handle,
                                  &add_char_params,
                                  &p_lbs->button_char_handles);
    if (err_code != NRF_SUCCESS)
    {
        return err_code;
    }

    // Add LED characteristic.
    memset(&add_char_params, 0, sizeof(add_char_params));
    add_char_params.uuid             = LBS_UUID_LED_CHAR;
    add_char_params.uuid_type        = p_lbs->uuid_type;
    add_char_params.init_len         = sizeof(uint8_t);
    add_char_params.max_len          = sizeof(uint8_t);
    add_char_params.char_props.read  = 1;
    add_char_params.char_props.write = 1;

    add_char_params.read_access  = SEC_OPEN;
    add_char_params.write_access = SEC_OPEN;

    return characteristic_add(p_lbs->service_handle, &add_char_params, &p_lbs->led_char_handles);
}

RE: Multiple service in one platform (HID + LBS)

Joakim Jakobsen — Mon, 22 Jul 2019 14:26:53 GMT

Ok. Maybe you could look at my suggestion below and try to remove the LBS uuid from your advertising packet, and see if your device will start advertising again?

Regards,
Joakim

RE: Multiple service in one platform (HID + LBS)

CY — Mon, 22 Jul 2019 13:48:21 GMT

Hi Joakim,

There did not show any error codes.

RE: Multiple service in one platform (HID + LBS)

Joakim Jakobsen — Mon, 22 Jul 2019 12:42:57 GMT

Hi.

The LBS_UUID is a 128-bit vendor specific UUID, so you might not be able to fit both the 16-bit HID UUID and the 128-bit LBS UUID inside the advertising packet without exceeding the 31 byte payload limit.

Have you tried debugging your application and tracked down the root cause to be inside the advertising init function? Do you see any error codes?

Best regards,
Joakim