Dear Nordic,
I would like to add 0x2901 Characteristic User Description, but I use below program, it return error_code = 15, please let me know what is the correct method to add 0x2901!
Thanks a lots!
kwan
/**@brief Function for adding the Data I/O characteristic.
*
*/
static uint32_t sn_char_add(ble_zwave_service_t * p_zwave_service, const ble_zwave_service_init_t * p_zwave_service_init)
{
uint32_t err_code;
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;
// Configure the CCCD which is needed for Notifications and Indications
memset(&cccd_md, 0, sizeof(cccd_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
cccd_md.vloc = BLE_GATTS_VLOC_STACK;
// Configure the characteristic metadata.
memset(&char_md, 0, sizeof(char_md));
char_md.char_props.read = 1;
char_md.char_props.write_wo_resp = 1;
char_md.char_props.notify = 1;
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;
// Add the ZWAVE SN Characteristic UUID
ble_uuid128_t base_uuid = {BLE_UUID_ZWAVE_SN_CHAR_BASE_UUID};
err_code = sd_ble_uuid_vs_add(&base_uuid, &p_zwave_service->uuid_type);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
ble_uuid.type = p_zwave_service->uuid_type;
ble_uuid.uuid = BLE_UUID_ZWAVE_SN_CHAR_UUID;
// Configure the characteristic value's metadata
memset(&attr_md, 0, sizeof(attr_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&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 = 0;
// Configure the characteristic value
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 = sizeof(uint8_t);
attr_char_value.p_value = NULL;
err_code=sd_ble_gatts_characteristic_add(p_zwave_service->service_handle, &char_md,
&attr_char_value,
&p_zwave_service->sn_char_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Add Report Reference descriptor
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_REPORT_REF_DESCR);
//BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_DESCRIPTOR_CHAR_USER_DESC);
memset(&attr_md, 0, sizeof(attr_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&attr_md.write_perm);
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 0;
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 = 30;
attr_char_value.init_offs = 0;
attr_char_value.max_len = 30;
attr_char_value.p_value = "Serial Number";
err_code = sd_ble_gatts_descriptor_add(p_zwave_service->sn_char_handles.value_handle,
&attr_char_value,
&p_zwave_service->descr_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
//Add descriptor
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_DESCRIPTOR_CHAR_USER_DESC);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&attr_md.write_perm);
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 0;
uint8_t attr_value[] = "Your User description";
const uint16_t attr_len = sizeof(attr_value);
ble_gatts_attr_t attr;
memset(&attr, 0, sizeof(attr));
attr.init_len = 30;
attr.max_len = 30;
attr.init_offs = 0;
attr.p_value = attr_value;
attr.p_attr_md = &attr_md;
attr.p_uuid = &ble_uuid;
err_code = sd_ble_gatts_descriptor_add(p_zwave_service->char_handle, &attr, &p_zwave_service->descr_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
return err_code;
}
