I'm trying to adapt the BLE_BAS_C library to perform discovery and read/write operations for a custom service. However, when I change the UUID that I register with ble_db_discovery_evt_register(), I see the services start to be discovered with sd_ble_gattc_primary_services_discover(), but when the db_discovery_evt_handler() in ble_bas_c is entered instead of the expected BLE_DB_DISCOVERY_COMPLETE event type I see BLE_DB_DISCOVERY_ERROR.
I'm wondering if this has to do with the fact that it's a vendor specific service rather than a standard BLE one. I've attached the changes I've made- is there something I'm missing, or do I need to do something else with regards to the UUID base.
CENTRAL
static void db_discovery_evt_handler(ble_db_discovery_evt_t * p_evt)
{
printf("[BAS_C] Discovery event handler \r\n");
// Check if the Battery Service was discovered.
if (p_evt->evt_type == BLE_DB_DISCOVERY_COMPLETE){
printf("[BAS_C] UUID 0x%x \r\n", p_evt->params.discovered_db.srv_uuid.uuid);
if (p_evt->params.discovered_db.srv_uuid.uuid == DEVICE_STATUS_SERVICE_UUID){
if (p_evt->params.discovered_db.srv_uuid.type == BLE_UUID_TYPE_VENDOR_BEGIN){
printf("[BAS_C] Battery Service discovered at peer.\r\n");
ble_bas_c_evt_t evt;
evt.evt_type = BLE_BAS_C_EVT_DISCOVERY_COMPLETE;
mp_ble_bas_c->evt_handler(mp_ble_bas_c, &evt);
}
}
}
else
{
printf("[BAS_C] Battery Service discovery failure at peer. \r\n");
}
}
uint32_t ble_bas_c_init(ble_bas_c_t * p_ble_bas_c, ble_bas_c_init_t * p_ble_bas_c_init)
{
if ((p_ble_bas_c == NULL) || (p_ble_bas_c_init == NULL))
{
return NRF_ERROR_NULL;
}
ble_uuid_t bas_uuid;
bas_uuid.type = BLE_UUID_TYPE_VENDOR_BEGIN;
bas_uuid.uuid = DEVICE_STATUS_SERVICE_UUID;
mp_ble_bas_c = p_ble_bas_c;
mp_ble_bas_c->conn_handle = BLE_CONN_HANDLE_INVALID;
mp_ble_bas_c->bl_cccd_handle = BLE_GATT_HANDLE_INVALID;
mp_ble_bas_c->bl_handle = BLE_GATT_HANDLE_INVALID;
mp_ble_bas_c->evt_handler = p_ble_bas_c_init->evt_handler;
return ble_db_discovery_evt_register(&bas_uuid, db_discovery_evt_handler);
}
PERIPHERAL
/**@brief Function for initializing services that will be used by the application.
*
* @details Initialize the multilink custom service.
*/
static void services_init(void)
{
uint32_t err_code;
ble_uuid_t uuid;
ble_gatts_char_md_t char_md;
ble_gatts_attr_t attr;
ble_gatts_attr_md_t attr_md;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_md_t char_ud_md;
uint16_t svc_test;
/* Add device status service */
ble_uuid128_t base_uuid = DEVICE_STATUS_BASE_UUID;
err_code = sd_ble_uuid_vs_add(&base_uuid, &m_base_uuid_type);
APP_ERROR_CHECK(err_code);
uuid.type = m_base_uuid_type;
uuid.uuid = DEVICE_STATUS_SERVICE_UUID;
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &uuid, &svc_test);
APP_ERROR_CHECK(err_code);
/* Add device status -> Side characteristic */
static uint8_t char_side_data;
static uint8_t char_side_ud[] = "Side Characteristic";
uuid.uuid = DEVICE_STATUS_SIDE_CHAR_UUID;
memset(&attr, 0, sizeof(ble_gatts_attr_t));
attr.p_uuid = &uuid;
attr.p_attr_md = &attr_md;
attr.max_len = 1;
attr.p_value = &char_side_data;
attr.init_len = sizeof(char_side_data);
memset(&attr_md, 0, sizeof(ble_gatts_attr_md_t));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&attr_md.write_perm);
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.vlen = 0;
memset(&cccd_md, 0, sizeof(ble_gatts_attr_md_t));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&cccd_md.write_perm);
cccd_md.vloc = BLE_GATTS_VLOC_STACK;
memset(&char_md, 0, sizeof(ble_gatts_char_md_t));
char_md.p_cccd_md = &cccd_md;
char_md.char_props.notify = 1;
char_md.char_props.indicate = 1;
char_md.char_props.read = 1;
char_md.char_props.write = 1;
char_md.char_ext_props.wr_aux = 1;
char_md.p_user_desc_md = &char_ud_md;
char_md.p_char_user_desc = char_side_ud;
char_md.char_user_desc_size = (uint8_t)strlen((char *)char_side_ud);
char_md.char_user_desc_max_size = (uint8_t)strlen((char *)char_side_ud);
memset(&char_ud_md, 0, sizeof(ble_gatts_attr_md_t));
char_ud_md.vloc = BLE_GATTS_VLOC_STACK;
char_ud_md.vlen = 1;
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&char_ud_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&char_ud_md.write_perm);
err_code = sd_ble_gatts_characteristic_add(BLE_GATT_HANDLE_INVALID,
&char_md,
&attr,
&m_side_handle);
APP_ERROR_CHECK(err_code);
/* Add device status -> MODE characteristic */
static uint8_t char_mode_data;
static uint8_t char_mode_ud[] = "Mode Characteristic";
uuid.uuid = DEVICE_STATUS_MODE_CHAR_UUID;
attr.p_uuid = &uuid;
attr.p_value = &char_mode_data;
attr.init_len = sizeof(char_mode_data);
char_md.p_char_user_desc = char_mode_ud;
char_md.char_user_desc_size = (uint8_t)strlen((char *)char_mode_ud);
char_md.char_user_desc_max_size = (uint8_t)strlen((char *)char_mode_ud);
err_code = sd_ble_gatts_characteristic_add(BLE_GATT_HANDLE_INVALID,
&char_md,
&attr,
&m_mode_handle);
APP_ERROR_CHECK(err_code);
/* Add device status -> STATUS characteristic */
static uint8_t char_status_data;
static uint8_t char_status_ud[] = "Status Characteristic";
uuid.uuid = DEVICE_STATUS_STATUS_CHAR_UUID;
attr.p_uuid = &uuid;
attr.p_value = &char_status_data;
attr.init_len = sizeof(char_status_data);
char_md.p_char_user_desc = char_status_ud;
char_md.char_user_desc_size = (uint8_t)strlen((char *)char_status_ud);
char_md.char_user_desc_max_size = (uint8_t)strlen((char *)char_status_ud);
err_code = sd_ble_gatts_characteristic_add(BLE_GATT_HANDLE_INVALID,
&char_md,
&attr,
&m_stream_status_handle);
APP_ERROR_CHECK(err_code);
}
