diff --git a/components/bt/bluedroid/api/esp_bt_main.c b/components/bt/bluedroid/api/esp_bt_main.c
index 1f1a42ac8c..b904a0509b 100644
--- a/components/bt/bluedroid/api/esp_bt_main.c
+++ b/components/bt/bluedroid/api/esp_bt_main.c
@@ -16,7 +16,7 @@
 #include "esp_bt_main.h"
 #include "btc_task.h"
 #include "btc_main.h"
-#include "bt.h"
+#include "esp_bt.h"
 #include "future.h"
 #include "allocator.h"
 
diff --git a/components/bt/bluedroid/hci/hci_hal_h4.c b/components/bt/bluedroid/hci/hci_hal_h4.c
index 6d823a58fd..b9231b1b6f 100644
--- a/components/bt/bluedroid/hci/hci_hal_h4.c
+++ b/components/bt/bluedroid/hci/hci_hal_h4.c
@@ -25,7 +25,7 @@
 #include "hci_internals.h"
 #include "hci_layer.h"
 #include "thread.h"
-#include "bt.h"
+#include "esp_bt.h"
 
 #define HCI_HAL_SERIAL_BUFFER_SIZE 1026
 #define HCI_BLE_EVENT 0x3e
diff --git a/components/bt/bluedroid/hci/hci_layer.c b/components/bt/bluedroid/hci/hci_layer.c
index 9519fd1d27..10b0959aae 100644
--- a/components/bt/bluedroid/hci/hci_layer.c
+++ b/components/bt/bluedroid/hci/hci_layer.c
@@ -16,7 +16,7 @@
  *
  ******************************************************************************/
 #include <string.h>
-#include "bt.h"
+#include "esp_bt.h"
 #include "bt_defs.h"
 #include "bt_trace.h"
 #include "hcidefs.h"
diff --git a/components/bt/bt.c b/components/bt/bt.c
index d344914727..6890bcf126 100644
--- a/components/bt/bt.c
+++ b/components/bt/bt.c
@@ -31,7 +31,7 @@
 #include "esp_intr.h"
 #include "esp_attr.h"
 #include "esp_phy_init.h"
-#include "bt.h"
+#include "esp_bt.h"
 #include "esp_err.h"
 #include "esp_log.h"
 #include "esp_pm.h"
diff --git a/components/bt/include/bt.h b/components/bt/include/bt.h
index 0c0355b60d..a957698fb0 100644
--- a/components/bt/include/bt.h
+++ b/components/bt/include/bt.h
@@ -1,244 +1,3 @@
-// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef __BT_H__
-#define __BT_H__
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "esp_err.h"
-#include "sdkconfig.h"
-#include "esp_task.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * @brief Controller config options, depend on config mask.
- *        Config mask indicate which functions enabled, this means 
- *        some options or parameters of some functions enabled by config mask.
- */
-typedef struct {
-    uint16_t controller_task_stack_size;    /*!< Bluetooth controller task stack size */
-    uint8_t controller_task_prio;           /*!< Bluetooth controller task priority */
-    uint8_t hci_uart_no;                    /*!< If use UART1/2 as HCI IO interface, indicate UART number */
-    uint32_t hci_uart_baudrate;             /*!< If use UART1/2 as HCI IO interface, indicate UART baudrate */
-} esp_bt_controller_config_t;
-
-#ifdef CONFIG_BT_ENABLED
-
-#ifdef CONFIG_BT_HCI_UART_NO
-#define BT_HCI_UART_NO_DEFAULT CONFIG_BT_HCI_UART_NO
-#else
-#define BT_HCI_UART_NO_DEFAULT 1
-#endif /* BT_HCI_UART_NO_DEFAULT */
-
-#ifdef CONFIG_BT_HCI_UART_BAUDRATE
-#define BT_HCI_UART_BAUDRATE_DEFAULT CONFIG_BT_HCI_UART_BAUDRATE
-#else
-#define BT_HCI_UART_BAUDRATE_DEFAULT 921600
-#endif /* BT_HCI_UART_BAUDRATE_DEFAULT */
-
-#define BT_CONTROLLER_INIT_CONFIG_DEFAULT() {                       \
-    .controller_task_stack_size = ESP_TASK_BT_CONTROLLER_STACK,     \
-    .controller_task_prio = ESP_TASK_BT_CONTROLLER_PRIO,            \
-    .hci_uart_no = BT_HCI_UART_NO_DEFAULT,                          \
-    .hci_uart_baudrate = BT_HCI_UART_BAUDRATE_DEFAULT,              \
-};
-#else
-#define BT_CONTROLLER_INIT_CONFIG_DEFAULT() {0}; _Static_assert(0, "please enable bluetooth in menuconfig to use bt.h");
-#endif
-
-/**
- * @brief Bluetooth mode for controller enable/disable
- */
-typedef enum {
-    ESP_BT_MODE_IDLE       = 0x00,   /*!< Bluetooth is not running */
-    ESP_BT_MODE_BLE        = 0x01,   /*!< Run BLE mode */
-    ESP_BT_MODE_CLASSIC_BT = 0x02,   /*!< Run Classic BT mode */
-    ESP_BT_MODE_BTDM       = 0x03,   /*!< Run dual mode */
-} esp_bt_mode_t;
-
-/**
- * @brief Bluetooth controller enable/disable/initialised/de-initialised status
- */
-typedef enum {
-    ESP_BT_CONTROLLER_STATUS_IDLE = 0,
-    ESP_BT_CONTROLLER_STATUS_INITED,
-    ESP_BT_CONTROLLER_STATUS_ENABLED,
-    ESP_BT_CONTROLLER_STATUS_NUM,
-} esp_bt_controller_status_t;
-
-
-/**
- * @brief BLE tx power type
- *        ESP_BLE_PWR_TYPE_CONN_HDL0-8: for each connection, and only be set after connetion completed.
- *                                      when disconnect, the correspond TX power is not effected.
- *        ESP_BLE_PWR_TYPE_ADV : for advertising/scan response.
- *        ESP_BLE_PWR_TYPE_SCAN : for scan.
- *        ESP_BLE_PWR_TYPE_DEFAULT : if each connection's TX power is not set, it will use this default value.
- *                                   if neither in scan mode nor in adv mode, it will use this default value.
- *        If none of power type is set, system will use ESP_PWR_LVL_P1 as default for ADV/SCAN/CONN0-9.
- */
-typedef enum {
-    ESP_BLE_PWR_TYPE_CONN_HDL0  = 0,            /*!< For connection handle 0 */
-    ESP_BLE_PWR_TYPE_CONN_HDL1  = 1,            /*!< For connection handle 1 */
-    ESP_BLE_PWR_TYPE_CONN_HDL2  = 2,            /*!< For connection handle 2 */
-    ESP_BLE_PWR_TYPE_CONN_HDL3  = 3,            /*!< For connection handle 3 */
-    ESP_BLE_PWR_TYPE_CONN_HDL4  = 4,            /*!< For connection handle 4 */
-    ESP_BLE_PWR_TYPE_CONN_HDL5  = 5,            /*!< For connection handle 5 */
-    ESP_BLE_PWR_TYPE_CONN_HDL6  = 6,            /*!< For connection handle 6 */
-    ESP_BLE_PWR_TYPE_CONN_HDL7  = 7,            /*!< For connection handle 7 */
-    ESP_BLE_PWR_TYPE_CONN_HDL8  = 8,            /*!< For connection handle 8 */
-    ESP_BLE_PWR_TYPE_ADV        = 9,            /*!< For advertising */
-    ESP_BLE_PWR_TYPE_SCAN       = 10,           /*!< For scan */
-    ESP_BLE_PWR_TYPE_DEFAULT    = 11,           /*!< For default, if not set other, it will use default value */
-    ESP_BLE_PWR_TYPE_NUM        = 12,           /*!< TYPE numbers */
-} esp_ble_power_type_t;
-
-/**
- * @brief Bluetooth TX power level(index), it's just a index corresponding to power(dbm).
- */
-typedef enum {
-    ESP_PWR_LVL_N14 = 0,            /*!< Corresponding to -14dbm */
-    ESP_PWR_LVL_N11 = 1,            /*!< Corresponding to -11dbm */
-    ESP_PWR_LVL_N8  = 2,            /*!< Corresponding to  -8dbm */
-    ESP_PWR_LVL_N5  = 3,            /*!< Corresponding to  -5dbm */
-    ESP_PWR_LVL_N2  = 4,            /*!< Corresponding to  -2dbm */
-    ESP_PWR_LVL_P1  = 5,            /*!< Corresponding to   1dbm */
-    ESP_PWR_LVL_P4  = 6,            /*!< Corresponding to   4dbm */
-    ESP_PWR_LVL_P7  = 7,            /*!< Corresponding to   7dbm */
-} esp_power_level_t;
-
-/**
- * @brief  Set BLE TX power
- *         Connection Tx power should only be set after connection created.
- * @param  power_type : The type of which tx power, could set Advertising/Connection/Default and etc
- * @param  power_level: Power level(index) corresponding to absolute value(dbm)
- * @return              ESP_OK - success, other - failed
- */
-esp_err_t esp_ble_tx_power_set(esp_ble_power_type_t power_type, esp_power_level_t power_level);
-
-/**
- * @brief  Get BLE TX power
- *         Connection Tx power should only be get after connection created.
- * @param  power_type : The type of which tx power, could set Advertising/Connection/Default and etc
- * @return             >= 0 - Power level, < 0 - Invalid
- */
-esp_power_level_t esp_ble_tx_power_get(esp_ble_power_type_t power_type);
-
-
-/**
- * @brief  Initialize BT controller to allocate task and other resource.
- * @param  cfg: Initial configuration of BT controller.
- * This function should be called only once, before any other BT functions are called.
- * @return       ESP_OK - success, other - failed
- */
-esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg);
-
-/**
- * @brief  De-initialize BT controller to free resource and delete task.
- *
- * This function should be called only once, after any other BT functions are called.
- * This function is not whole completed, esp_bt_controller_init cannot called after this function.
- * @return  ESP_OK - success, other - failed
- */
-esp_err_t esp_bt_controller_deinit(void);
-
-/**
- * @brief Enable BT controller.
- *               Due to a known issue, you cannot call esp_bt_controller_enable() a second time
- *               to change the controller mode dynamically. To change controller mode, call
- *               esp_bt_controller_disable() and then call esp_bt_controller_enable() with the new mode.
- * @param mode : the mode(BLE/BT/BTDM) to enable.
- * @return       ESP_OK - success, other - failed
- */
-esp_err_t esp_bt_controller_enable(esp_bt_mode_t mode);
-
-/**
- * @brief  Disable BT controller
- * @return       ESP_OK - success, other - failed
- */
-esp_err_t esp_bt_controller_disable(void);
-
-/**
- * @brief  Get BT controller is initialised/de-initialised/enabled/disabled
- * @return status value
- */
-esp_bt_controller_status_t esp_bt_controller_get_status(void);
-
-/** @brief esp_vhci_host_callback
- *  used for vhci call host function to notify what host need to do
- */
-typedef struct esp_vhci_host_callback {
-    void (*notify_host_send_available)(void);               /*!< callback used to notify that the host can send packet to controller */
-    int (*notify_host_recv)(uint8_t *data, uint16_t len);   /*!< callback used to notify that the controller has a packet to send to the host*/
-} esp_vhci_host_callback_t;
-
-/** @brief esp_vhci_host_check_send_available
- *  used for check actively if the host can send packet to controller or not.
- *  @return true for ready to send, false means cannot send packet
- */
-bool esp_vhci_host_check_send_available(void);
-
-/** @brief esp_vhci_host_send_packet
- * host send packet to controller
- * @param data the packet point
- *,@param len the packet length
- */
-void esp_vhci_host_send_packet(uint8_t *data, uint16_t len);
-
-/** @brief esp_vhci_host_register_callback
- * register the vhci referece callback, the call back
- * struct defined by vhci_host_callback structure.
- * @param callback esp_vhci_host_callback type variable
- */
-void esp_vhci_host_register_callback(const esp_vhci_host_callback_t *callback);
-
-/** @brief esp_bt_controller_mem_release
- * release the memory by mode, if never use the bluetooth mode
- * it can release the .bbs, .data and other section to heap.
- * The total size is about 70k bytes.
- *
- * If esp_bt_controller_enable(mode) has already been called, calling
- * esp_bt_controller_mem_release(ESP_BT_MODE_BTDM) will automatically
- * release all memory which is not needed for the currently enabled
- * Bluetooth controller mode.
- *
- * For example, calling esp_bt_controller_enable(ESP_BT_MODE_BLE) then
- * esp_bt_controller_mem_release(ESP_BT_MODE_BTDM) will enable BLE modes
- * and release memory only used by BT Classic. Also, call esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT)
- * is the same.
- *
- * Note that once BT controller memory is released, the process cannot be reversed.
- * If your firmware will later upgrade the Bluetooth controller mode (BLE -> BT Classic or disabled -> enabled)
- * then do not call this function.
- *
- * If user never use bluetooth controller, could call esp_bt_controller_mem_release(ESP_BT_MODE_BTDM)
- * before esp_bt_controller_init or after esp_bt_controller_deinit.
- *
- * For example, user only use bluetooth to config SSID and PASSWORD of WIFI, after config, will never use bluetooth.
- * Then, could call esp_bt_controller_mem_release(ESP_BT_MODE_BTDM) after esp_bt_controller_deinit.
- *
- * @param mode : the mode want to release memory
- * @return ESP_OK - success, other - failed
- */
-esp_err_t esp_bt_controller_mem_release(esp_bt_mode_t mode);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* __BT_H__ */
+#pragma once
+#warning "This header is deprecated, please use functions defined in esp_bt.h instead."
+#include "esp_bt.h"
diff --git a/components/bt/include/esp_bt.h b/components/bt/include/esp_bt.h
new file mode 100644
index 0000000000..30a535015d
--- /dev/null
+++ b/components/bt/include/esp_bt.h
@@ -0,0 +1,244 @@
+// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef __ESP_BT_H__
+#define __ESP_BT_H__
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "esp_err.h"
+#include "sdkconfig.h"
+#include "esp_task.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Controller config options, depend on config mask.
+ *        Config mask indicate which functions enabled, this means 
+ *        some options or parameters of some functions enabled by config mask.
+ */
+typedef struct {
+    uint16_t controller_task_stack_size;    /*!< Bluetooth controller task stack size */
+    uint8_t controller_task_prio;           /*!< Bluetooth controller task priority */
+    uint8_t hci_uart_no;                    /*!< If use UART1/2 as HCI IO interface, indicate UART number */
+    uint32_t hci_uart_baudrate;             /*!< If use UART1/2 as HCI IO interface, indicate UART baudrate */
+} esp_bt_controller_config_t;
+
+#ifdef CONFIG_BT_ENABLED
+
+#ifdef CONFIG_BT_HCI_UART_NO
+#define BT_HCI_UART_NO_DEFAULT CONFIG_BT_HCI_UART_NO
+#else
+#define BT_HCI_UART_NO_DEFAULT 1
+#endif /* BT_HCI_UART_NO_DEFAULT */
+
+#ifdef CONFIG_BT_HCI_UART_BAUDRATE
+#define BT_HCI_UART_BAUDRATE_DEFAULT CONFIG_BT_HCI_UART_BAUDRATE
+#else
+#define BT_HCI_UART_BAUDRATE_DEFAULT 921600
+#endif /* BT_HCI_UART_BAUDRATE_DEFAULT */
+
+#define BT_CONTROLLER_INIT_CONFIG_DEFAULT() {                       \
+    .controller_task_stack_size = ESP_TASK_BT_CONTROLLER_STACK,     \
+    .controller_task_prio = ESP_TASK_BT_CONTROLLER_PRIO,            \
+    .hci_uart_no = BT_HCI_UART_NO_DEFAULT,                          \
+    .hci_uart_baudrate = BT_HCI_UART_BAUDRATE_DEFAULT,              \
+};
+#else
+#define BT_CONTROLLER_INIT_CONFIG_DEFAULT() {0}; _Static_assert(0, "please enable bluetooth in menuconfig to use bt.h");
+#endif
+
+/**
+ * @brief Bluetooth mode for controller enable/disable
+ */
+typedef enum {
+    ESP_BT_MODE_IDLE       = 0x00,   /*!< Bluetooth is not running */
+    ESP_BT_MODE_BLE        = 0x01,   /*!< Run BLE mode */
+    ESP_BT_MODE_CLASSIC_BT = 0x02,   /*!< Run Classic BT mode */
+    ESP_BT_MODE_BTDM       = 0x03,   /*!< Run dual mode */
+} esp_bt_mode_t;
+
+/**
+ * @brief Bluetooth controller enable/disable/initialised/de-initialised status
+ */
+typedef enum {
+    ESP_BT_CONTROLLER_STATUS_IDLE = 0,
+    ESP_BT_CONTROLLER_STATUS_INITED,
+    ESP_BT_CONTROLLER_STATUS_ENABLED,
+    ESP_BT_CONTROLLER_STATUS_NUM,
+} esp_bt_controller_status_t;
+
+
+/**
+ * @brief BLE tx power type
+ *        ESP_BLE_PWR_TYPE_CONN_HDL0-8: for each connection, and only be set after connetion completed.
+ *                                      when disconnect, the correspond TX power is not effected.
+ *        ESP_BLE_PWR_TYPE_ADV : for advertising/scan response.
+ *        ESP_BLE_PWR_TYPE_SCAN : for scan.
+ *        ESP_BLE_PWR_TYPE_DEFAULT : if each connection's TX power is not set, it will use this default value.
+ *                                   if neither in scan mode nor in adv mode, it will use this default value.
+ *        If none of power type is set, system will use ESP_PWR_LVL_P1 as default for ADV/SCAN/CONN0-9.
+ */
+typedef enum {
+    ESP_BLE_PWR_TYPE_CONN_HDL0  = 0,            /*!< For connection handle 0 */
+    ESP_BLE_PWR_TYPE_CONN_HDL1  = 1,            /*!< For connection handle 1 */
+    ESP_BLE_PWR_TYPE_CONN_HDL2  = 2,            /*!< For connection handle 2 */
+    ESP_BLE_PWR_TYPE_CONN_HDL3  = 3,            /*!< For connection handle 3 */
+    ESP_BLE_PWR_TYPE_CONN_HDL4  = 4,            /*!< For connection handle 4 */
+    ESP_BLE_PWR_TYPE_CONN_HDL5  = 5,            /*!< For connection handle 5 */
+    ESP_BLE_PWR_TYPE_CONN_HDL6  = 6,            /*!< For connection handle 6 */
+    ESP_BLE_PWR_TYPE_CONN_HDL7  = 7,            /*!< For connection handle 7 */
+    ESP_BLE_PWR_TYPE_CONN_HDL8  = 8,            /*!< For connection handle 8 */
+    ESP_BLE_PWR_TYPE_ADV        = 9,            /*!< For advertising */
+    ESP_BLE_PWR_TYPE_SCAN       = 10,           /*!< For scan */
+    ESP_BLE_PWR_TYPE_DEFAULT    = 11,           /*!< For default, if not set other, it will use default value */
+    ESP_BLE_PWR_TYPE_NUM        = 12,           /*!< TYPE numbers */
+} esp_ble_power_type_t;
+
+/**
+ * @brief Bluetooth TX power level(index), it's just a index corresponding to power(dbm).
+ */
+typedef enum {
+    ESP_PWR_LVL_N14 = 0,            /*!< Corresponding to -14dbm */
+    ESP_PWR_LVL_N11 = 1,            /*!< Corresponding to -11dbm */
+    ESP_PWR_LVL_N8  = 2,            /*!< Corresponding to  -8dbm */
+    ESP_PWR_LVL_N5  = 3,            /*!< Corresponding to  -5dbm */
+    ESP_PWR_LVL_N2  = 4,            /*!< Corresponding to  -2dbm */
+    ESP_PWR_LVL_P1  = 5,            /*!< Corresponding to   1dbm */
+    ESP_PWR_LVL_P4  = 6,            /*!< Corresponding to   4dbm */
+    ESP_PWR_LVL_P7  = 7,            /*!< Corresponding to   7dbm */
+} esp_power_level_t;
+
+/**
+ * @brief  Set BLE TX power
+ *         Connection Tx power should only be set after connection created.
+ * @param  power_type : The type of which tx power, could set Advertising/Connection/Default and etc
+ * @param  power_level: Power level(index) corresponding to absolute value(dbm)
+ * @return              ESP_OK - success, other - failed
+ */
+esp_err_t esp_ble_tx_power_set(esp_ble_power_type_t power_type, esp_power_level_t power_level);
+
+/**
+ * @brief  Get BLE TX power
+ *         Connection Tx power should only be get after connection created.
+ * @param  power_type : The type of which tx power, could set Advertising/Connection/Default and etc
+ * @return             >= 0 - Power level, < 0 - Invalid
+ */
+esp_power_level_t esp_ble_tx_power_get(esp_ble_power_type_t power_type);
+
+
+/**
+ * @brief  Initialize BT controller to allocate task and other resource.
+ * @param  cfg: Initial configuration of BT controller.
+ * This function should be called only once, before any other BT functions are called.
+ * @return       ESP_OK - success, other - failed
+ */
+esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg);
+
+/**
+ * @brief  De-initialize BT controller to free resource and delete task.
+ *
+ * This function should be called only once, after any other BT functions are called.
+ * This function is not whole completed, esp_bt_controller_init cannot called after this function.
+ * @return  ESP_OK - success, other - failed
+ */
+esp_err_t esp_bt_controller_deinit(void);
+
+/**
+ * @brief Enable BT controller.
+ *               Due to a known issue, you cannot call esp_bt_controller_enable() a second time
+ *               to change the controller mode dynamically. To change controller mode, call
+ *               esp_bt_controller_disable() and then call esp_bt_controller_enable() with the new mode.
+ * @param mode : the mode(BLE/BT/BTDM) to enable.
+ * @return       ESP_OK - success, other - failed
+ */
+esp_err_t esp_bt_controller_enable(esp_bt_mode_t mode);
+
+/**
+ * @brief  Disable BT controller
+ * @return       ESP_OK - success, other - failed
+ */
+esp_err_t esp_bt_controller_disable(void);
+
+/**
+ * @brief  Get BT controller is initialised/de-initialised/enabled/disabled
+ * @return status value
+ */
+esp_bt_controller_status_t esp_bt_controller_get_status(void);
+
+/** @brief esp_vhci_host_callback
+ *  used for vhci call host function to notify what host need to do
+ */
+typedef struct esp_vhci_host_callback {
+    void (*notify_host_send_available)(void);               /*!< callback used to notify that the host can send packet to controller */
+    int (*notify_host_recv)(uint8_t *data, uint16_t len);   /*!< callback used to notify that the controller has a packet to send to the host*/
+} esp_vhci_host_callback_t;
+
+/** @brief esp_vhci_host_check_send_available
+ *  used for check actively if the host can send packet to controller or not.
+ *  @return true for ready to send, false means cannot send packet
+ */
+bool esp_vhci_host_check_send_available(void);
+
+/** @brief esp_vhci_host_send_packet
+ * host send packet to controller
+ * @param data the packet point
+ *,@param len the packet length
+ */
+void esp_vhci_host_send_packet(uint8_t *data, uint16_t len);
+
+/** @brief esp_vhci_host_register_callback
+ * register the vhci referece callback, the call back
+ * struct defined by vhci_host_callback structure.
+ * @param callback esp_vhci_host_callback type variable
+ */
+void esp_vhci_host_register_callback(const esp_vhci_host_callback_t *callback);
+
+/** @brief esp_bt_controller_mem_release
+ * release the memory by mode, if never use the bluetooth mode
+ * it can release the .bbs, .data and other section to heap.
+ * The total size is about 70k bytes.
+ *
+ * If esp_bt_controller_enable(mode) has already been called, calling
+ * esp_bt_controller_mem_release(ESP_BT_MODE_BTDM) will automatically
+ * release all memory which is not needed for the currently enabled
+ * Bluetooth controller mode.
+ *
+ * For example, calling esp_bt_controller_enable(ESP_BT_MODE_BLE) then
+ * esp_bt_controller_mem_release(ESP_BT_MODE_BTDM) will enable BLE modes
+ * and release memory only used by BT Classic. Also, call esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT)
+ * is the same.
+ *
+ * Note that once BT controller memory is released, the process cannot be reversed.
+ * If your firmware will later upgrade the Bluetooth controller mode (BLE -> BT Classic or disabled -> enabled)
+ * then do not call this function.
+ *
+ * If user never use bluetooth controller, could call esp_bt_controller_mem_release(ESP_BT_MODE_BTDM)
+ * before esp_bt_controller_init or after esp_bt_controller_deinit.
+ *
+ * For example, user only use bluetooth to config SSID and PASSWORD of WIFI, after config, will never use bluetooth.
+ * Then, could call esp_bt_controller_mem_release(ESP_BT_MODE_BTDM) after esp_bt_controller_deinit.
+ *
+ * @param mode : the mode want to release memory
+ * @return ESP_OK - success, other - failed
+ */
+esp_err_t esp_bt_controller_mem_release(esp_bt_mode_t mode);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ESP_BT_H__ */
diff --git a/examples/bluetooth/a2dp_sink/main/main.c b/examples/bluetooth/a2dp_sink/main/main.c
index 9febabae23..e77aa449cb 100644
--- a/examples/bluetooth/a2dp_sink/main/main.c
+++ b/examples/bluetooth/a2dp_sink/main/main.c
@@ -23,7 +23,7 @@
 #include "esp_system.h"
 #include "esp_log.h"
 
-#include "bt.h"
+#include "esp_bt.h"
 #include "bt_app_core.h"
 #include "bt_app_av.h"
 #include "esp_bt_main.h"
diff --git a/examples/bluetooth/ble_adv/main/app_bt.c b/examples/bluetooth/ble_adv/main/app_bt.c
index 2b3a5bbf29..74697844ee 100644
--- a/examples/bluetooth/ble_adv/main/app_bt.c
+++ b/examples/bluetooth/ble_adv/main/app_bt.c
@@ -16,7 +16,7 @@
 #include <string.h>
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
-#include "bt.h"
+#include "esp_bt.h"
 #include "esp_log.h"
 #include "nvs_flash.h"
 
diff --git a/examples/bluetooth/ble_eddystone/main/esp_eddystone_demo.c b/examples/bluetooth/ble_eddystone/main/esp_eddystone_demo.c
index c7719f6fa2..7def481ae0 100644
--- a/examples/bluetooth/ble_eddystone/main/esp_eddystone_demo.c
+++ b/examples/bluetooth/ble_eddystone/main/esp_eddystone_demo.c
@@ -23,7 +23,7 @@
 #include <stdint.h>
 #include <string.h>
 
-#include "bt.h"
+#include "esp_bt.h"
 #include "nvs_flash.h"
 #include "esp_log.h"
 #include "esp_bt_defs.h"
diff --git a/examples/bluetooth/ble_ibeacon/main/ibeacon_demo.c b/examples/bluetooth/ble_ibeacon/main/ibeacon_demo.c
index 63884a9fc9..e0d71ba8ed 100644
--- a/examples/bluetooth/ble_ibeacon/main/ibeacon_demo.c
+++ b/examples/bluetooth/ble_ibeacon/main/ibeacon_demo.c
@@ -23,7 +23,7 @@
 #include "controller.h"
 #include "nvs_flash.h"
 
-#include "bt.h"
+#include "esp_bt.h"
 #include "esp_gap_ble_api.h"
 #include "esp_gattc_api.h"
 #include "esp_gatt_defs.h"
diff --git a/examples/bluetooth/ble_spp_client/main/spp_client_demo.c b/examples/bluetooth/ble_spp_client/main/spp_client_demo.c
index 0cc082297a..b2968b38ca 100644
--- a/examples/bluetooth/ble_spp_client/main/spp_client_demo.c
+++ b/examples/bluetooth/ble_spp_client/main/spp_client_demo.c
@@ -27,7 +27,7 @@
 #include "controller.h"
 #include "driver/uart.h"
 
-#include "bt.h"
+#include "esp_bt.h"
 #include "nvs_flash.h"
 #include "esp_bt_device.h"
 #include "esp_gap_ble_api.h"
diff --git a/examples/bluetooth/ble_spp_server/main/ble_spp_server_demo.c b/examples/bluetooth/ble_spp_server/main/ble_spp_server_demo.c
index f0d1567a21..399dc7e1df 100644
--- a/examples/bluetooth/ble_spp_server/main/ble_spp_server_demo.c
+++ b/examples/bluetooth/ble_spp_server/main/ble_spp_server_demo.c
@@ -19,7 +19,7 @@
 #include "esp_system.h"
 #include "esp_log.h"
 #include "nvs_flash.h"
-#include "bt.h"
+#include "esp_bt.h"
 #include "driver/uart.h"
 #include "string.h"
 
diff --git a/examples/bluetooth/blufi/main/blufi_example_main.c b/examples/bluetooth/blufi/main/blufi_example_main.c
index dfb2da4937..5895d5e285 100644
--- a/examples/bluetooth/blufi/main/blufi_example_main.c
+++ b/examples/bluetooth/blufi/main/blufi_example_main.c
@@ -23,7 +23,7 @@
 #include "esp_event_loop.h"
 #include "esp_log.h"
 #include "nvs_flash.h"
-#include "bt.h"
+#include "esp_bt.h"
 
 #include "esp_blufi_api.h"
 #include "esp_bt_defs.h"
diff --git a/examples/bluetooth/blufi/main/blufi_security.c b/examples/bluetooth/blufi/main/blufi_security.c
index 0a6d6a3442..fae034dd21 100644
--- a/examples/bluetooth/blufi/main/blufi_security.c
+++ b/examples/bluetooth/blufi/main/blufi_security.c
@@ -23,7 +23,7 @@
 #include "esp_event_loop.h"
 #include "esp_log.h"
 #include "nvs_flash.h"
-#include "bt.h"
+#include "esp_bt.h"
 
 #include "esp_blufi_api.h"
 #include "esp_bt_defs.h"
diff --git a/examples/bluetooth/controller_hci_uart/main/controller_hci_uart_demo.c b/examples/bluetooth/controller_hci_uart/main/controller_hci_uart_demo.c
index 333b94e4a7..872aca64f6 100644
--- a/examples/bluetooth/controller_hci_uart/main/controller_hci_uart_demo.c
+++ b/examples/bluetooth/controller_hci_uart/main/controller_hci_uart_demo.c
@@ -15,7 +15,7 @@
 #include <stdio.h>
 #include <string.h>
 #include "nvs_flash.h"
-#include "bt.h"
+#include "esp_bt.h"
 #include "driver/uart.h"
 #include "esp_log.h"
 
diff --git a/examples/bluetooth/gatt_client/main/gattc_demo.c b/examples/bluetooth/gatt_client/main/gattc_demo.c
index 645d6b64c7..d9bb810f92 100644
--- a/examples/bluetooth/gatt_client/main/gattc_demo.c
+++ b/examples/bluetooth/gatt_client/main/gattc_demo.c
@@ -31,7 +31,7 @@
 #include "nvs_flash.h"
 #include "controller.h"
 
-#include "bt.h"
+#include "esp_bt.h"
 #include "esp_gap_ble_api.h"
 #include "esp_gattc_api.h"
 #include "esp_gatt_defs.h"
diff --git a/examples/bluetooth/gatt_security_client/main/example_ble_sec_gattc_demo.c b/examples/bluetooth/gatt_security_client/main/example_ble_sec_gattc_demo.c
index 463dfc8492..a71d496df3 100644
--- a/examples/bluetooth/gatt_security_client/main/example_ble_sec_gattc_demo.c
+++ b/examples/bluetooth/gatt_security_client/main/example_ble_sec_gattc_demo.c
@@ -30,7 +30,7 @@
 #include "nvs_flash.h"
 #include "controller.h"
 
-#include "bt.h"
+#include "esp_bt.h"
 #include "esp_gap_ble_api.h"
 #include "esp_gattc_api.h"
 #include "esp_gatt_defs.h"
diff --git a/examples/bluetooth/gatt_security_server/main/example_ble_sec_gatts_demo.c b/examples/bluetooth/gatt_security_server/main/example_ble_sec_gatts_demo.c
index 3a71974d49..eb328c4f66 100644
--- a/examples/bluetooth/gatt_security_server/main/example_ble_sec_gatts_demo.c
+++ b/examples/bluetooth/gatt_security_server/main/example_ble_sec_gatts_demo.c
@@ -18,7 +18,7 @@
 #include "esp_system.h"
 #include "esp_log.h"
 #include "nvs_flash.h"
-#include "bt.h"
+#include "esp_bt.h"
 
 #include "esp_gap_ble_api.h"
 #include "esp_gatts_api.h"
diff --git a/examples/bluetooth/gatt_server/main/gatts_demo.c b/examples/bluetooth/gatt_server/main/gatts_demo.c
index b97a4fafbb..1bc35e4fd5 100644
--- a/examples/bluetooth/gatt_server/main/gatts_demo.c
+++ b/examples/bluetooth/gatt_server/main/gatts_demo.c
@@ -31,7 +31,7 @@
 #include "esp_system.h"
 #include "esp_log.h"
 #include "nvs_flash.h"
-#include "bt.h"
+#include "esp_bt.h"
 
 #include "esp_gap_ble_api.h"
 #include "esp_gatts_api.h"
diff --git a/examples/bluetooth/gatt_server_service_table/main/gatts_table_creat_demo.c b/examples/bluetooth/gatt_server_service_table/main/gatts_table_creat_demo.c
index 5c46a75ff7..25aee69649 100644
--- a/examples/bluetooth/gatt_server_service_table/main/gatts_table_creat_demo.c
+++ b/examples/bluetooth/gatt_server_service_table/main/gatts_table_creat_demo.c
@@ -26,7 +26,7 @@
  #include "esp_system.h"
  #include "esp_log.h"
  #include "nvs_flash.h"
- #include "bt.h"
+ #include "esp_bt.h"
 
 #include "esp_gap_ble_api.h"
 #include "esp_gatts_api.h"
diff --git a/examples/bluetooth/gattc_multi_connect/main/gattc_multi_connect.c b/examples/bluetooth/gattc_multi_connect/main/gattc_multi_connect.c
index b734d7fa45..6e19d57b16 100644
--- a/examples/bluetooth/gattc_multi_connect/main/gattc_multi_connect.c
+++ b/examples/bluetooth/gattc_multi_connect/main/gattc_multi_connect.c
@@ -34,7 +34,7 @@
 #include "nvs_flash.h"
 #include "controller.h"
 
-#include "bt.h"
+#include "esp_bt.h"
 #include "esp_gap_ble_api.h"
 #include "esp_gattc_api.h"
 #include "esp_gatt_defs.h"