diff --git a/components/bt/Kconfig b/components/bt/Kconfig
index 9b329e61e2..5b2cc3e6aa 100644
--- a/components/bt/Kconfig
+++ b/components/bt/Kconfig
@@ -11,27 +11,65 @@ config BLUEDROID_ENABLED
 		This enables the default Bluedroid Bluetooth stack
 
 config BTC_TASK_STACK_SIZE
-	int "Bluetooth event (callback to application) task stack size"
+    int "Bluetooth event (callback to application) task stack size"
     depends on BT_ENABLED
-	default 3072
-	help
-		This select btc task stack size
+    default 3072
+    help
+        This select btc task stack size
 
 config BLUEDROID_MEM_DEBUG
-	bool "Bluedroid memory debug"
+    bool "Bluedroid memory debug"
     depends on BT_ENABLED
-	default n
-	help
-		Bluedroid memory debug
+    default n
+    help
+        Bluedroid memory debug
 
 config BT_DRAM_RELEASE
-	bool "Release DRAM from Classic BT controller"
+    bool "Release DRAM from Classic BT controller"
     depends on BT_ENABLED
-	default n
-	help
-		This option should only be used when BLE only.
-		Open this option will release about 30K DRAM from Classic BT.
-		The released DRAM will be used as system heap memory.
+    default n
+    help
+        This option should only be used when BLE only.
+        Open this option will release about 30K DRAM from Classic BT.
+        The released DRAM will be used as system heap memory.
+
+#disable now for app cpu due to a known issue
+config BTDM_CONTROLLER_RUN_APP_CPU
+    bool "Run controller on APP CPU"
+    depends on BT_ENABLED && !FREERTOS_UNICORE && 0
+    default n
+    help
+        Run controller on APP CPU.
+
+config BTDM_CONTROLLER_RUN_CPU
+    int
+    depends on BT_ENABLED
+    default 1 if BTDM_CONTROLLER_RUN_APP_CPU
+    default 0
+
+menuconfig BT_HCI_UART
+    bool "HCI use UART as IO"
+    depends on BT_ENABLED
+    default n
+    help
+        Default HCI use VHCI, if this option choose, HCI will use UART(0/1/2) as IO.
+        Besides, it can set uart number and uart baudrate.
+
+config BT_HCI_UART_NO
+    int "UART Number for HCI"
+    depends on BT_HCI_UART
+    range 1 2
+    default 1
+    help
+        Uart number for HCI.
+
+config BT_HCI_UART_BAUDRATE
+    int "UART Baudrate for HCI"
+    depends on BT_HCI_UART
+    range 115200 921600
+    default 921600
+    help
+        UART Baudrate for HCI. Please use standard baudrate.
 
 # Memory reserved at start of DRAM for Bluetooth stack
 config BT_RESERVE_DRAM
diff --git a/components/bt/bt.c b/components/bt/bt.c
index e8f4204ef4..34b29b9c0c 100644
--- a/components/bt/bt.c
+++ b/components/bt/bt.c
@@ -15,6 +15,7 @@
 #include <stddef.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
@@ -33,13 +34,15 @@
 #if CONFIG_BT_ENABLED
 
 /* Bluetooth system and controller config */
-#define BTDM_CFG_BT_EM_RELEASE      (1<<0)
-#define BTDM_CFG_BT_DATA_RELEASE    (1<<1)
+#define BTDM_CFG_BT_EM_RELEASE              (1<<0)
+#define BTDM_CFG_BT_DATA_RELEASE            (1<<1)
+#define BTDM_CFG_HCI_UART                   (1<<2)
+#define BTDM_CFG_CONTROLLER_RUN_APP_CPU     (1<<3)
 /* Other reserved for future */
 
 /* not for user call, so don't put to include file */
 extern void btdm_osi_funcs_register(void *osi_funcs);
-extern void btdm_controller_init(uint32_t config_mask);
+extern void btdm_controller_init(uint32_t config_mask, esp_bt_controller_config_t *config_opts);
 extern void btdm_controller_schedule(void);
 extern void btdm_controller_deinit(void);
 extern int btdm_controller_enable(esp_bt_mode_t mode);
@@ -79,12 +82,14 @@ struct osi_funcs_t {
     int32_t (*_mutex_lock)(void *mutex);
     int32_t (*_mutex_unlock)(void *mutex);
     int32_t (* _read_efuse_mac)(uint8_t mac[6]);
+    void (* _srand)(unsigned int seed);
+    int (* _rand)(void);
 };
 
 /* Static variable declare */
 static bool btdm_bb_init_flag = false;
 static esp_bt_controller_status_t btdm_controller_status = ESP_BT_CONTROLLER_STATUS_IDLE;
-
+static esp_bt_controller_config_t btdm_cfg_opts;
 static xTaskHandle btControllerTaskHandle;
 
 static portMUX_TYPE global_int_mux = portMUX_INITIALIZER_UNLOCKED;
@@ -134,6 +139,16 @@ static int32_t IRAM_ATTR read_mac_wrapper(uint8_t mac[6])
     return esp_read_mac(mac, ESP_MAC_BT);
 }
 
+static void IRAM_ATTR srand_wrapper(unsigned int seed)
+{
+    /* empty function */
+}
+
+static int IRAM_ATTR rand_wrapper(void)
+{
+    return (int)esp_random();
+}
+
 static struct osi_funcs_t osi_funcs = {
     ._set_isr = xt_set_interrupt_handler,
     ._ints_on = xt_ints_on,
@@ -146,7 +161,9 @@ static struct osi_funcs_t osi_funcs = {
     ._mutex_create = mutex_create_wrapper,
     ._mutex_lock = mutex_lock_wrapper,
     ._mutex_unlock = mutex_unlock_wrapper,
-    ._read_efuse_mac = read_mac_wrapper
+    ._read_efuse_mac = read_mac_wrapper,
+    ._srand = srand_wrapper,
+    ._rand = rand_wrapper,
 };
 
 bool esp_vhci_host_check_send_available(void)
@@ -170,6 +187,12 @@ static uint32_t btdm_config_mask_load(void)
 
 #ifdef CONFIG_BT_DRAM_RELEASE
     mask |= (BTDM_CFG_BT_EM_RELEASE | BTDM_CFG_BT_DATA_RELEASE);
+#endif
+#ifdef CONFIG_BT_HCI_UART
+    mask |= BTDM_CFG_HCI_UART;
+#endif
+#ifdef CONFIG_BTDM_CONTROLLER_RUN_APP_CPU
+    mask |= BTDM_CFG_CONTROLLER_RUN_APP_CPU;
 #endif
     return mask;
 }
@@ -178,30 +201,46 @@ static void bt_controller_task(void *pvParam)
 {
     uint32_t btdm_cfg_mask = 0;
 
+    btdm_cfg_mask = btdm_config_mask_load();
+
     btdm_osi_funcs_register(&osi_funcs);
 
-    btdm_cfg_mask = btdm_config_mask_load();
-    btdm_controller_init(btdm_cfg_mask);
+    btdm_controller_init(btdm_cfg_mask, &btdm_cfg_opts);
 
     btdm_controller_status = ESP_BT_CONTROLLER_STATUS_INITED;
-
     /* Loop */
     btdm_controller_schedule();
 }
 
-void esp_bt_controller_init()
+esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
 {
+    BaseType_t ret;
+
     if (btdm_controller_status != ESP_BT_CONTROLLER_STATUS_IDLE) {
-        return;
+        return ESP_ERR_INVALID_STATE;
     }
 
-    xTaskCreatePinnedToCore(bt_controller_task, "btController",
+    if (cfg == NULL) {
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    memcpy(&btdm_cfg_opts, cfg, sizeof(esp_bt_controller_config_t));
+
+    ret = xTaskCreatePinnedToCore(bt_controller_task, "btController",
                             ESP_TASK_BT_CONTROLLER_STACK, NULL,
-                            ESP_TASK_BT_CONTROLLER_PRIO, &btControllerTaskHandle, 0);
+                            ESP_TASK_BT_CONTROLLER_PRIO, &btControllerTaskHandle, CONFIG_BTDM_CONTROLLER_RUN_CPU);
+
+    if (ret != pdPASS) {
+        memset(&btdm_cfg_opts, 0x0, sizeof(esp_bt_controller_config_t));
+        return ESP_ERR_NO_MEM;
+    }
+
+    return ESP_OK;
 }
 
 void esp_bt_controller_deinit(void)
 {
+    memset(&btdm_cfg_opts, 0x0, sizeof(esp_bt_controller_config_t));
     vTaskDelete(btControllerTaskHandle);
     btdm_controller_status = ESP_BT_CONTROLLER_STATUS_IDLE;
 }
diff --git a/components/bt/include/bt.h b/components/bt/include/bt.h
index e3bd7f0840..5a244e0c80 100644
--- a/components/bt/include/bt.h
+++ b/components/bt/include/bt.h
@@ -18,11 +18,44 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "esp_err.h"
+#include "sdkconfig.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 {
+    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() { \
+    .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
  */
@@ -45,10 +78,11 @@ typedef enum {
 
 /**
  * @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
  */
-void esp_bt_controller_init(void);
+esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg);
 
 /**
  * @brief  De-initialize BT controller to free resource and delete task.
diff --git a/components/bt/lib b/components/bt/lib
index 9a4bb1d528..0986936c6d 160000
--- a/components/bt/lib
+++ b/components/bt/lib
@@ -1 +1 @@
-Subproject commit 9a4bb1d5287572664f170f9df4dbfd71babdfc68
+Subproject commit 0986936c6d21a009d7d4249cbae8a23b0f3bd20b
diff --git a/docs/api/bluetooth/controller_vhci.rst b/docs/api/bluetooth/controller_vhci.rst
index 9fc5910c25..6241adfbd1 100644
--- a/docs/api/bluetooth/controller_vhci.rst
+++ b/docs/api/bluetooth/controller_vhci.rst
@@ -38,6 +38,9 @@ Enumerations
 Structures
 ^^^^^^^^^^
 
+.. doxygenstruct:: esp_bt_controller_config_t
+    :members:
+
 .. doxygenstruct:: esp_vhci_host_callback
     :members:
 
diff --git a/examples/bluetooth/ble_adv/main/app_bt.c b/examples/bluetooth/ble_adv/main/app_bt.c
index 67ab2c8fe0..31e8f2fa00 100644
--- a/examples/bluetooth/ble_adv/main/app_bt.c
+++ b/examples/bluetooth/ble_adv/main/app_bt.c
@@ -13,10 +13,13 @@
 // limitations under the License.
 
 #include <stdio.h>
+#include <string.h>
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "bt.h"
-#include <string.h>
+#include "esp_log.h"
+
+static const char *tag = "BLE_ADV";
 
 #define HCI_H4_CMD_PREAMBLE_SIZE           (4)
 
@@ -214,9 +217,15 @@ void bleAdvtTask(void *pvParameters)
 
 void app_main()
 {
-    esp_bt_controller_init();
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    
+    if (esp_bt_controller_init(&bt_cfg) != ESP_OK) {
+        ESP_LOGI(tag, "Bluetooth controller initialize failed");
+        return;
+    }
 
     if (esp_bt_controller_enable(ESP_BT_MODE_BTDM) != ESP_OK) {
+        ESP_LOGI(tag, "Bluetooth controller enable failed");
         return;
     }
 
diff --git a/examples/bluetooth/blufi/main/blufi_example_main.c b/examples/bluetooth/blufi/main/blufi_example_main.c
index 05f39c4859..2a3f2ce629 100644
--- a/examples/bluetooth/blufi/main/blufi_example_main.c
+++ b/examples/bluetooth/blufi/main/blufi_example_main.c
@@ -315,7 +315,11 @@ void app_main()
     ESP_ERROR_CHECK( nvs_flash_init() );
     initialise_wifi();
 
-    esp_bt_controller_init();
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    ret = esp_bt_controller_init(&bt_cfg);
+    if (ret) {
+        BLUFI_ERROR("%s initialize bt controller failed\n", __func__);
+    }
 
     ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM);
     if (ret) {
diff --git a/examples/bluetooth/controller_hci_uart/Makefile b/examples/bluetooth/controller_hci_uart/Makefile
new file mode 100644
index 0000000000..0773931993
--- /dev/null
+++ b/examples/bluetooth/controller_hci_uart/Makefile
@@ -0,0 +1,8 @@
+#
+# This is a project Makefile. It is assumed the directory this Makefile resides in is a
+# project subdirectory.
+#
+
+PROJECT_NAME := controller_hci_uart
+
+include $(IDF_PATH)/make/project.mk
diff --git a/examples/bluetooth/controller_hci_uart/README.rst b/examples/bluetooth/controller_hci_uart/README.rst
new file mode 100644
index 0000000000..f51c6c2c68
--- /dev/null
+++ b/examples/bluetooth/controller_hci_uart/README.rst
@@ -0,0 +1,7 @@
+ESP-IDF UART HCI Controller
+===========================
+
+This is a btdm controller use UART as HCI IO. This require the UART device support RTS/CTS mandatory.
+It can do the configuration of UART number and UART baudrate by menuconfig.
+
+
diff --git a/examples/bluetooth/controller_hci_uart/main/component.mk b/examples/bluetooth/controller_hci_uart/main/component.mk
new file mode 100644
index 0000000000..a98f634eae
--- /dev/null
+++ b/examples/bluetooth/controller_hci_uart/main/component.mk
@@ -0,0 +1,4 @@
+#
+# "main" pseudo-component makefile.
+#
+# (Uses default behaviour of compiling all source files in directory, adding 'include' to include path.)
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
new file mode 100644
index 0000000000..6270596d92
--- /dev/null
+++ b/examples/bluetooth/controller_hci_uart/main/controller_hci_uart_demo.c
@@ -0,0 +1,53 @@
+// 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.
+
+#include <stdio.h>
+#include <string.h>
+
+#include "bt.h"
+#include "driver/uart.h"
+#include "esp_log.h"
+
+static const char *tag = "CONTROLLER_UART_HCI";
+
+static void uart_gpio_reset(void)
+{
+#if CONFIG_BT_HCI_UART_NO
+    ESP_LOGI(tag, "HCI UART%d Pin select: TX 5, RX, 18, CTS 23, RTS 19", CONFIG_BT_HCI_UART_NO);
+
+    uart_set_pin(CONFIG_BT_HCI_UART_NO, 5, 18, 19, 23);
+#endif
+}
+
+void app_main()
+{ 
+    esp_err_t ret;
+
+    /* As the UART1/2 pin conflict with flash pin, so do matrix of the signal and pin */
+    uart_gpio_reset();
+
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    ret = esp_bt_controller_init(&bt_cfg);
+    if (ret != ESP_OK) {
+        ESP_LOGE(tag, "Bluetooth Controller initialize failed, ret %d", ret);
+        return;
+    }
+
+    ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM);
+    if (ret != ESP_OK) {
+        ESP_LOGE(tag, "Bluetooth Controller initialize failed, ret %d", ret);
+        return;
+    }
+}
+
diff --git a/examples/bluetooth/controller_hci_uart/sdkconfig.defaults b/examples/bluetooth/controller_hci_uart/sdkconfig.defaults
new file mode 100644
index 0000000000..32a86537f6
--- /dev/null
+++ b/examples/bluetooth/controller_hci_uart/sdkconfig.defaults
@@ -0,0 +1,10 @@
+# Override some defaults so BT stack is enabled
+# in this example
+
+#
+# BT config
+#
+CONFIG_BT_ENABLED=y
+CONFIG_BT_HCI_UART=y
+CONFIG_BT_HCI_UART_NO_DEFAULT=1
+CONFIG_BT_HCI_UART_BAUDRATE_DEFAULT=921600
diff --git a/examples/bluetooth/gatt_client/main/gattc_demo.c b/examples/bluetooth/gatt_client/main/gattc_demo.c
index 2904484913..9985ccdc3b 100644
--- a/examples/bluetooth/gatt_client/main/gattc_demo.c
+++ b/examples/bluetooth/gatt_client/main/gattc_demo.c
@@ -402,7 +402,8 @@ void gattc_client_test(void)
 
 void app_main()
 {
-    esp_bt_controller_init();
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    esp_bt_controller_init(&bt_cfg);
     esp_bt_controller_enable(ESP_BT_MODE_BTDM);
 
     gattc_client_test();
diff --git a/examples/bluetooth/gatt_server/main/gatts_demo.c b/examples/bluetooth/gatt_server/main/gatts_demo.c
index 39d33286a0..934078aa73 100644
--- a/examples/bluetooth/gatt_server/main/gatts_demo.c
+++ b/examples/bluetooth/gatt_server/main/gatts_demo.c
@@ -398,7 +398,12 @@ void app_main()
 {
     esp_err_t ret;
 
-    esp_bt_controller_init();
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    ret = esp_bt_controller_init(&bt_cfg);
+    if (ret) {
+        ESP_LOGE(GATTS_TAG, "%s initialize controller failed\n", __func__);
+        return;
+    }
 
     ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM);
     if (ret) {
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 9bb03e7e89..291d9f5941 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
@@ -313,7 +313,12 @@ void app_main()
 {
     esp_err_t ret;
 
-    esp_bt_controller_init();
+    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    ret = esp_bt_controller_init(&bt_cfg);
+    if (ret) {
+        ESP_LOGE(GATTS_TABLE_TAG, "%s enable controller failed\n", __func__);
+        return;
+    }
 
     ret = esp_bt_controller_enable(ESP_BT_MODE_BTDM);
     if (ret) {