Bluetooth® Device APIs

Overview

Bluetooth device reference APIs.

Application Examples

  • bluetooth/bluedroid/classic_bt/bt_spp_vfs_acceptor demonstrates how to use Serial Port Protocol (SPP) APIs to create an SPP acceptor that acts as a server and registers into the VFS. It also shows how to implement Secure Simple Pairing (SSP) in your own applications.

API Reference

Header File

  • components/bt/host/bluedroid/api/include/api/esp_bt_device.h

  • This header file can be included with:

    #include "esp_bt_device.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_err_t esp_bt_dev_register_callback(esp_bt_dev_cb_t callback)

register callback function. This function should be called after esp_bluedroid_enable() completes successfully

Returns

  • ESP_OK : Succeed

  • ESP_FAIL: others

const uint8_t *esp_bt_dev_get_address(void)

Get bluetooth device address. Must use after "esp_bluedroid_enable".

Returns

bluetooth device address (six bytes), or NULL if bluetooth stack is not enabled

esp_err_t esp_bt_dev_set_device_name(const char *name)

Set bluetooth device name. This function should be called after esp_bluedroid_enable() completes successfully.

A BR/EDR/LE device type shall have a single Bluetooth device name which shall be identical irrespective of the physical channel used to perform the name discovery procedure.

Parameters

name -- [in] : device name to be set

Returns

  • ESP_OK : Succeed

  • ESP_ERR_INVALID_ARG : if name is NULL pointer or empty, or string length out of limit

  • ESP_ERR_INVALID_STATE : if bluetooth stack is not yet enabled

  • ESP_FAIL : others

esp_err_t esp_bt_dev_get_device_name(void)

Get bluetooth device name. This function should be called after esp_bluedroid_enable() completes successfully.

A BR/EDR/LE device type shall have a single Bluetooth device name which shall be identical irrespective of the physical channel used to perform the name discovery procedure.

Returns

  • ESP_OK : Succeed

  • ESP_ERR_INVALID_STATE : if bluetooth stack is not yet enabled

  • ESP_FAIL : others

esp_err_t esp_bt_dev_coex_status_config(esp_bt_dev_coex_type_t type, esp_bt_dev_coex_op_t op, uint8_t status)

Config bluetooth device coexis status. This function should be called after esp_bluedroid_enable() completes successfully.

Parameters

  • type -- [in] : coexist type to operate on

  • op -- [in] : clear or set coexist status

  • status -- [in] : coexist status to be configured

Returns

  • ESP_OK : Succeed

  • ESP_ERR_INVALID_ARG : if name is NULL pointer or empty, or string length out of limit

  • ESP_ERR_INVALID_STATE : if bluetooth stack is not yet enabled

  • ESP_FAIL : others

esp_err_t esp_bt_config_file_path_update(const char *file_path)

This function is used to update the path name of bluetooth bond keys saved in the NVS module and need to be called before esp_bluedroid_init().

Parameters

file_path -- [in] the name of config file path, the length of file_path should be less than NVS_NS_NAME_MAX_SIZE

Returns

  • ESP_OK: success

  • other: failed

Unions

union esp_bt_dev_cb_param_t
#include <esp_bt_device.h>

BT device callback parameters.

Public Members

struct esp_bt_dev_cb_param_t::name_res_param name_res

discovery result parameter struct

struct name_res_param
#include <esp_bt_device.h>

ESP_BT_DEV_NAME_RES_EVT.

Public Members

esp_bt_status_t status

Status of getting device name

char *name

Name of Bluetooth device

Macros

ESP_BT_DEV_COEX_BLE_ST_MESH_CONFIG
ESP_BT_DEV_COEX_BLE_ST_MESH_TRAFFIC
ESP_BT_DEV_COEX_BLE_ST_MESH_STANDBY
ESP_BT_DEV_COEX_BT_ST_A2DP_STREAMING
ESP_BT_DEV_COEX_BT_ST_A2DP_PAUSED
ESP_BT_DEV_COEX_OP_CLEAR
ESP_BT_DEV_COEX_OP_SET

Type Definitions

typedef uint8_t esp_bt_dev_coex_op_t
typedef void (*esp_bt_dev_cb_t)(esp_bt_dev_cb_event_t event, esp_bt_dev_cb_param_t *param)

bluetooth device callback function type

Param event

: Event type

Param param

: Pointer to callback parameter

Enumerations

enum esp_bt_dev_coex_type_t

Bluetooth device coex type.

Values:

enumerator ESP_BT_DEV_COEX_TYPE_BLE
enumerator ESP_BT_DEV_COEX_TYPE_BT
enum esp_bt_dev_cb_event_t

BT device callback events.

Values:

enumerator ESP_BT_DEV_NAME_RES_EVT

Device name result event

enumerator ESP_BT_DEV_EVT_MAX

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