If, how can I change the order of the descriptor? I would like to have the user_desc at first. Most likely by changing their UUID but how to do that? I can't find any trace of them in the code.. I tried changing the order of their declaration and memset in code but it didn't change anything.
Maybe it is just a fixed order per definition?
Relevant code part:
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;
static uint8_t multilink_peripheral_data;
static uint8_t multilink_peripheral_ud[] = "Druck MSB"; //c
ble_uuid128_t base_uuid = MULTILINK_PERIPHERAL_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 = MULTILINK_PERIPHERAL_SERVICE_UUID;
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &uuid, &svc_test);
APP_ERROR_CHECK(err_code);
uuid.uuid = MULTILINK_PERIPHERAL_CHAR_UUID;
memset(&attr, 0, sizeof(ble_gatts_attr_t));
attr.p_uuid = &uuid;
attr.p_attr_md = &attr_md;
attr.max_len = 3; //c 1->2
attr.p_value = &multilink_peripheral_data;
attr.init_len = sizeof(multilink_peripheral_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 = multilink_peripheral_ud;
char_md.char_user_desc_size = (uint8_t)strlen((char *)multilink_peripheral_ud);
char_md.char_user_desc_max_size = (uint8_t)strlen((char *)multilink_peripheral_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_char_handles);
APP_ERROR_CHECK(err_code);
}
