S120 central discover service fail

[sowmya]

Hello,

I am using NUS service as a peripheral with read and write characteristics and tested on master control panel. Now I am using S120 stack for central device and able to scan for the device. But when central tries to connect, I am getting Service not found event. Can anyone tell me the cause for this?

Update: I added uuid in both server and client, still I am getting BLE_DB_DISCOVERY_SRV_NOT_FOUND event.

Here is the code snippet for peripheral:

    ble_uuid_t        service_uuid;
ble_uuid128_t     base_uuid = BLE_UUID_OUR_BASE_UUID;
service_uuid.uuid = BLE_UUID_NUS_SERVICE;

// Initialize the service structure.
p_hrs->conn_handle             = BLE_CONN_HANDLE_INVALID;
p_hrs->data_handler            = p_hrs_init->evt_handler;
p_hrs->is_notification_enabled = false;

// add custom base UUID
err_code = sd_ble_uuid_vs_add(&base_uuid, &p_hrs->uuid_type);
if(err_code != NRF_SUCCESS)
 {
 	return err_code;
 }

service_uuid.type = p_hrs->uuid_type;

// Add the service
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
                                    &service_uuid,
                                    &p_hrs->service_handle);
if(err_code != NRF_SUCCESS)
 {
 	return err_code;
 }

// Add the RX Characteristic.
err_code = heart_rate_measurement_char_add(p_hrs, p_hrs_init);
if (err_code != NRF_SUCCESS)
{
    return err_code;
}

err_code = heart_rate_measurement_read_char_add(p_hrs, p_hrs_init);
if (err_code != NRF_SUCCESS)
{
    return err_code;
}

 return NRF_SUCCESS;

Here is the code snippet for central:

void client_handling_init(void)
{
uint32_t err_code;
uint32_t i;

ble_uuid128_t base_uuid = BLE_UUID_OUR_BASE_UUID;

err_code = sd_ble_uuid_vs_add(&base_uuid, &m_base_uuid_type);
APP_ERROR_CHECK(err_code);

for (i = 0; i < MAX_CLIENTS; i++)
{
    m_client[i].state  = IDLE;
}

m_client_count = 0;

db_discovery_init();

// Register with discovery module for the discovery of the service.
ble_uuid_t uuid;

uuid.type = m_base_uuid_type;
uuid.uuid = BLE_UUID_DEVICE_INFORMATION_SERVICE;

err_code = ble_db_discovery_evt_register(&uuid,
                                         db_discovery_evt_handler);

APP_ERROR_CHECK(err_code);
}

Regards,
Sowmya

[Petter Myhre]

In the central you have BLE_UUID_DEVICE_INFORMATION_SERVICE while in peripheral you have BLE_UUID_NUS_SERVICE. Are these equal? Also, are you aware of this example?

[sowmya]

Hello Petter, yes that was the I had done. Now it is able to connect to the peripheral and I am testing the same central application with light blue app on iPad and again I am getting BLE_DB_DISCOVERY_SRV_NOT_FOUND event. Can I know how to set notify or nus service in light blue? The same application on iPad is able to connect and send notification with master control panel.

[Petter Myhre]

I'm not following. Is it working now with Nordic as central and peripheral? But not with iOS?

[sowmya]

Yes it is working with nRF51822 board but not with iOS.

[Petter Myhre]

The UUID that appears in Master Control Panel, is it equal to the UUID used in central?