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This document is not updated for ESP32H21 yet, so some of the content may not be correct.

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# Bluetooth® Main API

## API Reference

### Header File

- components/bt/host/bluedroid/api/include/api/esp_bt_main.h

- This header file can be included with:

  >     #include "esp_bt_main.h"

- This header file is a part of the API provided by the `bt` component. To declare that your component depends on `bt`, add the following to your CMakeLists.txt:

  >     REQUIRES bt

  > or

  >     PRIV_REQUIRES bt

### Functions

esp_bluedroid_status_t esp_bluedroid_get_status(void)

  Get bluetooth stack status.

  返回:

    Bluetooth stack status

esp_err_t esp_bluedroid_enable(void)

  Enable bluetooth, must after esp_bluedroid_init_with_cfg().

  返回:

    - ESP_OK : Succeed

    - Other : Failed

esp_err_t esp_bluedroid_disable(void)

  Disable Bluetooth, must be called prior to esp_bluedroid_deinit().

  备注

  Before calling this API, ensure that all activities related to the application, such as connections, scans, etc., are properly closed.

  返回:

    - ESP_OK : Succeed

    - Other : Failed

esp_err_t esp_bluedroid_init(void)

  Init and alloc the resource for bluetooth, must be prior to every bluetooth stuff.

  返回:

    - ESP_OK : Succeed

    - Other : Failed

esp_err_t esp_bluedroid_init_with_cfg(esp_bluedroid_config_t *cfg)

  Init and alloc the resource for bluetooth, must be prior to every bluetooth stuff.

  参数:

    cfg -- Initial configuration of ESP Bluedroid stack.

  返回:

    - ESP_OK : Succeed

    - Other : Failed

esp_err_t esp_bluedroid_deinit(void)

  Deinit and free the resource for bluetooth, must be after every bluetooth stuff.

  返回:

    - ESP_OK : Succeed

    - Other : Failed

### Structures

struct esp_bluedroid_config_t

  Bluetooth stack configuration.

  Public Members

  bool ssp_en

    Whether SSP(secure simple pairing) or legacy pairing is used for Classic Bluetooth

  bool sc_en

    Whether secure connection host support is enabled or disabled for Classic Bluetooth

### Macros

BT_BLUEDROID_INIT_CONFIG_DEFAULT()

### Enumerations

enum esp_bluedroid_status_t

  Bluetooth stack status type, to indicate whether the bluetooth stack is ready.

  Values:

  enumerator ESP_BLUEDROID_STATUS_UNINITIALIZED

    Bluetooth stack is not initialized

  enumerator ESP_BLUEDROID_STATUS_INITIALIZED

    Bluetooth stack is initialized but not yet enabled

  enumerator ESP_BLUEDROID_STATUS_ENABLED

    Bluetooth stack is fully initialized and enabled

  enumerator ESP_BLUEDROID_STATUS_DISABLING

    Bluetooth stack is in the process of being disabled

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