s130 slave NUS service, No CCCD discovered

[sowmya]

Hello,

I am having an working application with S120 and S110; master and slave application. Now I need the master and slave functionality on the same board and using S130 softdevice 1.0.0v and with 9.0 SDK with custom board.

I referred the ble_app_hrs_rscs_relay project and in my application on power up, the device will work in slave mode. I am using NUS service and testing the peripheral activity on the Master Control Panel and getting the error No CCCD discovered, cannot enable services when I try to enable services in MCP.

This is the code snippet to add service and characteristic for peripheral role:

ble_uuid_t        service_uuid;
ble_uuid128_t     base_uuid = BLE_UUID_RES_BASE_UUID;
service_uuid.uuid = 0x0001;

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

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

service_uuid.type = p_sos_v->uuid_type;

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

// Add the RX Characteristic.
err_code = sos_v_rx_characteristic_add(p_sos_v, p_sos_v_init);		// send from slave
if (err_code != NRF_SUCCESS)
{
    return err_code;
}

Characteristic code snippet:

static uint32_t sos_v_rx_characteristic_add(ble_sos_v_t            * p_sos_v,
                                            const ble_sos_v_init_t * p_sos_v_init)
   {
ble_gatts_char_md_t char_md;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_t    attr_char_value;
ble_uuid_t          ble_uuid;
ble_gatts_attr_md_t attr_md;

memset(&cccd_md, 0, sizeof(cccd_md));

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(char_md));

char_md.char_props.notify = 1;
char_md.char_props.read   = 0;
char_md.char_props.write  = 0;
char_md.char_props.write_wo_resp = 0;
char_md.p_char_user_desc  = NULL;
char_md.p_char_pf         = NULL;
char_md.p_user_desc_md    = NULL;
char_md.p_cccd_md         = &cccd_md;
char_md.p_sccd_md         = NULL;

ble_uuid.type             = p_sos_v->uuid_type;
ble_uuid.uuid             = BLE_UUID_NUS_RX_CHARACTERISTIC;

memset(&attr_md, 0, sizeof(attr_md));

BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);

attr_md.vloc              = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth           = 0;
attr_md.wr_auth           = 0;
attr_md.vlen              = 1;

memset(&attr_char_value, 0, sizeof(attr_char_value));

attr_char_value.p_uuid    = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len  = sizeof(uint8_t);
attr_char_value.init_offs = 0;
attr_char_value.max_len   = BLE_NUS_MAX_RX_CHAR_LEN;

return sd_ble_gatts_characteristic_add(p_sos_v->service_handle,
								 &char_md,
								 &attr_char_value,
								 &p_sos_v->sos_v_rx_handles);
}

Does anyone know the reason for the error in MCP or am I missing any configurations to be done to work with S130?

Regards, Sowmya

[sowmya]

Hi, I replaced the code with

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);

and added event handling for secondary parameter request and system attribute missing, and it is working.

But the thing is peripheral is not having the bonding i.e., MITM is false. Can we enable peripheral MITM in S130? I checked with relay example and it is also the same.