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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_ble_ots/ble_hvx_buffering.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_ble_ots/ble_hvx_buffering.h
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+/**
+ * Copyright (c) 2017 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+/**@file
+ *
+ * @defgroup ble_sdk_srv_ots_buf Object Transfer Service, HVX buffering
+ * @{
+ * @ingroup  ble_ots
+ * @brief    Object Transfer Service module
+ *
+ * @details  This module is responsible for buffering indications and notifications. 
+ */
+
+#ifndef BLE_HVX_BUFFERING_H__
+#define BLE_HVX_BUFFERING_H__
+
+
+#include <stdint.h>
+#include "ble_types.h"
+#include "ble_gatts.h"
+
+#define BLE_HVX_BUF_LEN  (1 << 3) // 8
+#define BLE_HVX_BUF_MASK (BLE_HVX_BUF_LEN-1)
+
+/**@brief ble_hvx_t represents one notification/indication. */
+typedef struct {
+    uint16_t               conn_handle;                    /**< The associated connection handle. */
+    uint8_t                data[BLE_GATT_ATT_MTU_DEFAULT]; /**< The hvx data. */
+    uint16_t               data_len;
+    ble_gatts_hvx_params_t params;                  /**< Parameters of the hvx. */
+} ble_hvx_t;
+
+/**@brief ble_hvx_buf_t is the structure holding the state of the hvx buffering module. */
+typedef struct {   
+    ble_hvx_t               buf[BLE_HVX_BUF_LEN];   /**< A buffer of nofications/indications. */
+
+    uint8_t                 insert_index;
+    uint8_t                 read_index;
+} ble_hvx_buf_t;
+
+/**@brief Function for initializing the HVX buffer module.
+ *
+ * @param[out]  p_ble_hvx_buf   HVX buffering structure.
+ * @return      NRF_SUCCESS     If the given paramer is valid.
+ */
+uint32_t ble_hvx_init(ble_hvx_buf_t * p_ble_hvx_buf);
+
+/**@brief Function for obtaining the pointer to the next hvx. The user can then fill out the hvx structure.
+ *
+ * @param[in]   p_ble_hvx_buf   HVX buffering structure.
+ * @return      ble_hvx_t *     If there is a free ble_hvx_t.
+ * @return      NULL            If there is no free ble_hvx_t, or an invalid parameter is supplied.
+ */
+ble_hvx_t * ble_hvx_get_p_to_next_hvx(ble_hvx_buf_t * p_ble_hvx_buf);
+
+/**@brief Function for sending something from the HVX buffer.
+ *
+ * @param[in]   p_ble_hvx_buf   HVX buffering structure.
+ * @return      NRF_SUCCESS     If a indication/notification was successfully sent.
+ */
+uint32_t ble_hvx_buffer_process(ble_hvx_buf_t * p_ble_hvx_buf);
+
+
+#endif // BLE_HVX_BUFFERING_H__
+
+/** @} */
+