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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® Generic Defines

## API Reference

### Header File

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

- This header file can be included with:

  >     #include "esp_bt_defs.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

### Structures

struct esp_ble_conn_params_t

  create connection parameters

  Public Members

  uint16_t scan_interval

    Initial scan interval, in units of 0.625ms, the range is 0x0004(2.5ms) to 0xFFFF(10.24s).

  uint16_t scan_window

    Initial scan window, in units of 0.625ms, the range is 0x0004(2.5ms) to 0xFFFF(10.24s).

  uint16_t interval_min

    Minimum connection interval, in units of 1.25 ms, the range is 0x0006(7.5ms) to 0x0C80(4s). Sub-spec values are accepted only if the controller supports them.

  uint16_t interval_max

    Maximum connection interval, in units of 1.25 ms, the range is 0x0006(7.5ms) to 0x0C80(4s). Same bounds as interval_min.

  uint16_t latency

    Connection latency, the range is 0x0000(0) to 0x01F3(499).

  uint16_t supervision_timeout

    Connection supervision timeout, in units of 10ms, the range is from 0x000A(100ms) to 0x0C80(32s).

  uint16_t min_ce_len

    Minimum connection event length, in units of 0.625ms, setting to 0 for no preferred parameters.

  uint16_t max_ce_len

    Maximum connection event length, in units of 0.625ms, setting to 0 for no preferred parameters.

struct esp_bt_uuid_t

  UUID type.

  Public Members

  uint16_t len

    UUID length, 16bit, 32bit or 128bit

  uint16_t uuid16

    16bit UUID

  uint32_t uuid32

    32bit UUID

  uint8_t uuid128[ESP_UUID_LEN_128]

    128bit UUID

  union esp_bt_uuid_t uuid

    UUID

### Macros

ESP_BLUEDROID_STATUS_CHECK(status)

ESP_BT_STATUS_BASE_FOR_HCI_ERR

ESP_HCI_ERR_SUCCESS

ESP_HCI_ERR_UNKNOWN_CMD

ESP_HCI_ERR_UNKNOWN_CONN_ID

ESP_HCI_ERR_HW_FAILURE

ESP_HCI_ERR_PAGE_TIMEOUT

ESP_HCI_ERR_AUTH_FAIL

ESP_HCI_ERR_PIN_OR_KEY_MISSING

ESP_HCI_ERR_MEM_CAPACITY_EXCEEDED

ESP_HCI_ERR_CONN_TIMEOUT

ESP_HCI_ERR_CONN_LIMIT_EXCEEDED

ESP_HCI_ERR_SYNC_CONN_LIMIT_EXCEEDED

ESP_HCI_ERR_CONN_ALREADY_EXISTS

ESP_HCI_ERR_CMD_DISALLOWED

ESP_HCI_ERR_INSUFFICIENT_RESOURCES

ESP_HCI_ERR_INSUFFICIENT_SECURITY

ESP_HCI_ERR_BD_ADDR_UNACCEPTABLE

ESP_HCI_ERR_CONN_ACCEPT_TIMEOUT

ESP_HCI_ERR_UNSUPP_FEATURE_PARAM_VAL

ESP_HCI_ERR_INVALID_PARAM

ESP_HCI_ERR_REMOTE_USER_TERM_CONN

ESP_HCI_ERR_REMOTE_LOW_RESOURCES

ESP_HCI_ERR_REMOTE_POWER_OFF

ESP_HCI_ERR_LOCALHOST_TERM_CONN

ESP_HCI_ERR_REPEATED_ATTEMPTS

ESP_HCI_ERR_PAIRING_NOT_ALLOWED

ESP_HCI_ERR_UNKNOWN_LMP_PDU

ESP_HCI_ERR_UNSUPP_REMOTE_FEATURE

ESP_HCI_ERR_SCO_OFFSET_REJECTED

ESP_HCI_ERR_SCO_INTERVAL_REJECTED

ESP_HCI_ERR_SCO_AIR_MODE_REJECTED

ESP_HCI_ERR_INVALID_LL_PARAM

ESP_HCI_ERR_UNSPECIFIED

ESP_HCI_ERR_UNSUPP_LL_PARAM_VAL

ESP_HCI_ERR_ROLE_CHANGE_NOT_ALLOWED

ESP_HCI_ERR_LL_RESP_TIMEOUT

ESP_HCI_ERR_LL_PROC_COLLISION

ESP_HCI_ERR_LMP_PDU_NOT_ALLOWED

ESP_HCI_ERR_ENC_MODE_NOT_ACCEPTABLE

ESP_HCI_ERR_LINK_KEY_CANNOT_BE_CHANGED

ESP_HCI_ERR_REQUESTED_QOS_NOT_SUPPORTED

ESP_HCI_ERR_INSTANT_PASSED

ESP_HCI_ERR_PAIRING_NOT_SUPPORTED

ESP_HCI_ERR_DIFF_TRANS_COLLISION

ESP_HCI_ERR_UNDEFINED_0x2B

ESP_HCI_ERR_QOS_UNACCEPTABLE_PARAM

ESP_HCI_ERR_QOS_REJECTED

ESP_HCI_ERR_CHAN_ASSESS_NOT_SUPPORTED

ESP_HCI_ERR_INSUFF_SECURITY

ESP_HCI_ERR_PARAM_OUT_OF_MANDATORY_RANGE

ESP_HCI_ERR_UNDEFINED_0x31

ESP_HCI_ERR_ROLE_SWITCH_PENDING

ESP_HCI_ERR_UNDEFINED_0x33

ESP_HCI_ERR_RESERVED_SLOT_VIOLATION

ESP_HCI_ERR_ROLE_SWITCH_FAILED

ESP_HCI_ERR_EXT_INQ_RESP_TOO_LARGE

ESP_HCI_ERR_SIMPLE_PAIR_NOT_SUPP_BY_HOST

ESP_HCI_ERR_HOST_BUSY_PAIRING

ESP_HCI_ERR_CONN_REJECTED_DUE_TO_NO_CHAN

ESP_HCI_ERR_CONTROLLER_BUSY

ESP_HCI_ERR_UNACCEPT_CONN_PARAM

ESP_HCI_ERR_ADV_TIMEOUT

ESP_HCI_ERR_TERM_DUE_TO_MIC_FAIL

ESP_HCI_ERR_CONN_FAIL_TO_ESTAB

ESP_HCI_ERR_MAC_CONN_FAILED

ESP_HCI_ERR_CLOCK_ADJUST_REJECTED

ESP_HCI_ERR_SUBMAP_NOT_DEFINED

ESP_HCI_ERR_UNKNOWN_ADV_IDENTIFIER

ESP_HCI_ERR_LIMIT_REACHED

ESP_HCI_ERR_OP_CANCELLED_BY_HOST

ESP_HCI_ERR_PACKET_TOO_LONG

ESP_HCI_ERR_TOO_LATE

ESP_HCI_ERR_TOO_EARLY

ESP_HCI_ERR_INSUFFICIENT_CHANNELS

ESP_BT_OCTET16_LEN

ESP_BT_OCTET8_LEN

ESP_DEFAULT_GATT_IF

  Default GATT interface id.

ESP_BLE_PRIM_ADV_INT_MIN

  Minimum advertising interval for undirected and low duty cycle directed advertising

ESP_BLE_PRIM_ADV_INT_MAX

  Maximum advertising interval for undirected and low duty cycle directed advertising

ESP_BLE_CONN_INT_MIN

  Minimum connection interval, 7.5 ms (BLE Core Spec minimum)

ESP_BLE_CONN_INT_MAX

  relate to BTM_BLE_CONN_INT_MAX in stack/btm_ble_api.h

ESP_BLE_CONN_LATENCY_MAX

  relate to ESP_BLE_CONN_LATENCY_MAX in stack/btm_ble_api.h

ESP_BLE_CONN_SUP_TOUT_MIN

  relate to BTM_BLE_CONN_SUP_TOUT_MIN in stack/btm_ble_api.h

ESP_BLE_CONN_SUP_TOUT_MAX

  relate to ESP_BLE_CONN_SUP_TOUT_MAX in stack/btm_ble_api.h

ESP_BLE_PHY_1M_PREF_MASK

  The Host prefers use the LE1M transmitter or receiver PHY

ESP_BLE_PHY_2M_PREF_MASK

  The Host prefers use the LE2M transmitter or receiver PHY

ESP_BLE_PHY_CODED_PREF_MASK

  The Host prefers use the LE CODED transmitter or receiver PHY

ESP_BLE_IS_VALID_PARAM(x, min, max)

  Check the param is valid or not.

ESP_UUID_LEN_16

ESP_UUID_LEN_32

ESP_UUID_LEN_128

ESP_BD_ADDR_LEN

  Bluetooth address length.

ESP_PEER_IRK_LEN

  Bluetooth peer irk.

ESP_BLE_ENC_KEY_MASK

  Used to exchange the encryption key in the init key & response key.

ESP_BLE_ID_KEY_MASK

  Used to exchange the IRK key in the init key & response key.

ESP_BLE_CSR_KEY_MASK

  Used to exchange the CSRK key in the init key & response key.

ESP_BLE_LINK_KEY_MASK

  Used to exchange the link key(this key just used in the BLE & BR/EDR coexist mode) in the init key & response key.

ESP_APP_ID_MIN

  Minimum of the application id.

ESP_APP_ID_MAX

  Maximum of the application id.

ESP_BD_ADDR_STR

ESP_BD_ADDR_HEX(addr)

ESP_BLE_ADV_NAME_LEN_MAX

ESP_INVALID_CONN_HANDLE

### Type Definitions

typedef uint8_t esp_bt_octet16_t[ESP_BT_OCTET16_LEN]

typedef uint8_t esp_bt_octet8_t[ESP_BT_OCTET8_LEN]

typedef uint8_t esp_link_key[ESP_BT_OCTET16_LEN]

typedef uint8_t esp_ble_phy_mask_t

typedef uint8_t esp_bd_addr_t[ESP_BD_ADDR_LEN]

  Bluetooth device address.

typedef uint8_t esp_ble_key_mask_t

### Enumerations

enum esp_bt_status_t

  Status Return Value.

  Values:

  enumerator ESP_BT_STATUS_SUCCESS
  enumerator ESP_BT_STATUS_FAIL
  enumerator ESP_BT_STATUS_NOT_READY
  enumerator ESP_BT_STATUS_NOMEM
  enumerator ESP_BT_STATUS_BUSY
  enumerator ESP_BT_STATUS_DONE
  enumerator ESP_BT_STATUS_UNSUPPORTED
  enumerator ESP_BT_STATUS_PARM_INVALID
  enumerator ESP_BT_STATUS_UNHANDLED
  enumerator ESP_BT_STATUS_AUTH_FAILURE
  enumerator ESP_BT_STATUS_RMT_DEV_DOWN
  enumerator ESP_BT_STATUS_AUTH_REJECTED
  enumerator ESP_BT_STATUS_INVALID_STATIC_RAND_ADDR
  enumerator ESP_BT_STATUS_PENDING
  enumerator ESP_BT_STATUS_UNACCEPT_CONN_INTERVAL
  enumerator ESP_BT_STATUS_PARAM_OUT_OF_RANGE
  enumerator ESP_BT_STATUS_TIMEOUT
  enumerator ESP_BT_STATUS_PEER_LE_DATA_LEN_UNSUPPORTED
  enumerator ESP_BT_STATUS_CONTROL_LE_DATA_LEN_UNSUPPORTED
  enumerator ESP_BT_STATUS_ERR_ILLEGAL_PARAMETER_FMT
  enumerator ESP_BT_STATUS_MEMORY_FULL
  enumerator ESP_BT_STATUS_EIR_TOO_LARGE
  enumerator ESP_BT_STATUS_HCI_SUCCESS
  enumerator ESP_BT_STATUS_HCI_ILLEGAL_COMMAND
  enumerator ESP_BT_STATUS_HCI_NO_CONNECTION
  enumerator ESP_BT_STATUS_HCI_HW_FAILURE
  enumerator ESP_BT_STATUS_HCI_PAGE_TIMEOUT
  enumerator ESP_BT_STATUS_HCI_AUTH_FAILURE
  enumerator ESP_BT_STATUS_HCI_KEY_MISSING
  enumerator ESP_BT_STATUS_HCI_MEMORY_FULL
  enumerator ESP_BT_STATUS_HCI_CONNECTION_TOUT
  enumerator ESP_BT_STATUS_HCI_MAX_NUM_OF_CONNECTIONS
  enumerator ESP_BT_STATUS_HCI_MAX_NUM_OF_SCOS
  enumerator ESP_BT_STATUS_HCI_CONNECTION_EXISTS
  enumerator ESP_BT_STATUS_HCI_COMMAND_DISALLOWED
  enumerator ESP_BT_STATUS_HCI_HOST_REJECT_RESOURCES
  enumerator ESP_BT_STATUS_HCI_HOST_REJECT_SECURITY
  enumerator ESP_BT_STATUS_HCI_HOST_REJECT_DEVICE
  enumerator ESP_BT_STATUS_HCI_HOST_TIMEOUT
  enumerator ESP_BT_STATUS_HCI_UNSUPPORTED_VALUE
  enumerator ESP_BT_STATUS_HCI_ILLEGAL_PARAMETER_FMT
  enumerator ESP_BT_STATUS_HCI_PEER_USER
  enumerator ESP_BT_STATUS_HCI_PEER_LOW_RESOURCES
  enumerator ESP_BT_STATUS_HCI_PEER_POWER_OFF
  enumerator ESP_BT_STATUS_HCI_CONN_CAUSE_LOCAL_HOST
  enumerator ESP_BT_STATUS_HCI_REPEATED_ATTEMPTS
  enumerator ESP_BT_STATUS_HCI_PAIRING_NOT_ALLOWED
  enumerator ESP_BT_STATUS_HCI_UNKNOWN_LMP_PDU
  enumerator ESP_BT_STATUS_HCI_UNSUPPORTED_REM_FEATURE
  enumerator ESP_BT_STATUS_HCI_SCO_OFFSET_REJECTED
  enumerator ESP_BT_STATUS_HCI_SCO_INTERVAL_REJECTED
  enumerator ESP_BT_STATUS_HCI_SCO_AIR_MODE
  enumerator ESP_BT_STATUS_HCI_INVALID_LMP_PARAM
  enumerator ESP_BT_STATUS_HCI_UNSPECIFIED
  enumerator ESP_BT_STATUS_HCI_UNSUPPORTED_LMP_PARAMETERS
  enumerator ESP_BT_STATUS_HCI_ROLE_CHANGE_NOT_ALLOWED
  enumerator ESP_BT_STATUS_HCI_LMP_RESPONSE_TIMEOUT
  enumerator ESP_BT_STATUS_HCI_LMP_ERR_TRANS_COLLISION
  enumerator ESP_BT_STATUS_HCI_LMP_PDU_NOT_ALLOWED
  enumerator ESP_BT_STATUS_HCI_ENCRY_MODE_NOT_ACCEPTABLE
  enumerator ESP_BT_STATUS_HCI_UNIT_KEY_USED
  enumerator ESP_BT_STATUS_HCI_QOS_NOT_SUPPORTED
  enumerator ESP_BT_STATUS_HCI_INSTANT_PASSED
  enumerator ESP_BT_STATUS_HCI_PAIRING_WITH_UNIT_KEY_NOT_SUPPORTED
  enumerator ESP_BT_STATUS_HCI_DIFF_TRANSACTION_COLLISION
  enumerator ESP_BT_STATUS_HCI_UNDEFINED_0x2B
  enumerator ESP_BT_STATUS_HCI_QOS_UNACCEPTABLE_PARAM
  enumerator ESP_BT_STATUS_HCI_QOS_REJECTED
  enumerator ESP_BT_STATUS_HCI_CHAN_CLASSIF_NOT_SUPPORTED
  enumerator ESP_BT_STATUS_HCI_INSUFFCIENT_SECURITY
  enumerator ESP_BT_STATUS_HCI_PARAM_OUT_OF_RANGE
  enumerator ESP_BT_STATUS_HCI_UNDEFINED_0x31
  enumerator ESP_BT_STATUS_HCI_ROLE_SWITCH_PENDING
  enumerator ESP_BT_STATUS_HCI_UNDEFINED_0x33
  enumerator ESP_BT_STATUS_HCI_RESERVED_SLOT_VIOLATION
  enumerator ESP_BT_STATUS_HCI_ROLE_SWITCH_FAILED
  enumerator ESP_BT_STATUS_HCI_INQ_RSP_DATA_TOO_LARGE
  enumerator ESP_BT_STATUS_HCI_SIMPLE_PAIRING_NOT_SUPPORTED
  enumerator ESP_BT_STATUS_HCI_HOST_BUSY_PAIRING
  enumerator ESP_BT_STATUS_HCI_REJ_NO_SUITABLE_CHANNEL
  enumerator ESP_BT_STATUS_HCI_CONTROLLER_BUSY
  enumerator ESP_BT_STATUS_HCI_UNACCEPT_CONN_INTERVAL
  enumerator ESP_BT_STATUS_HCI_DIRECTED_ADVERTISING_TIMEOUT
  enumerator ESP_BT_STATUS_HCI_CONN_TOUT_DUE_TO_MIC_FAILURE
  enumerator ESP_BT_STATUS_HCI_CONN_FAILED_ESTABLISHMENT
  enumerator ESP_BT_STATUS_HCI_MAC_CONNECTION_FAILED
  enumerator ESP_BT_STATUS_HCI_CCA_REJECTED
  enumerator ESP_BT_STATUS_HCI_TYPE0_SUBMAP_NOT_DEFINED
  enumerator ESP_BT_STATUS_HCI_UNKNOWN_ADV_ID
  enumerator ESP_BT_STATUS_HCI_LIMIT_REACHED
  enumerator ESP_BT_STATUS_HCI_OPT_CANCEL_BY_HOST
  enumerator ESP_BT_STATUS_HCI_PKT_TOO_LONG
  enumerator ESP_BT_STATUS_HCI_TOO_LATE
  enumerator ESP_BT_STATUS_HCI_TOO_EARLY

enum esp_bt_dev_type_t

  Bluetooth device type.

  Values:

  enumerator ESP_BT_DEVICE_TYPE_BREDR
  enumerator ESP_BT_DEVICE_TYPE_BLE
  enumerator ESP_BT_DEVICE_TYPE_DUMO

enum esp_ble_addr_type_t

  BLE device address type.

  Values:

  enumerator BLE_ADDR_TYPE_PUBLIC

    Public Device Address

  enumerator BLE_ADDR_TYPE_RANDOM

    Random Device Address. To set this address, use the function esp_ble_gap_set_rand_addr(esp_bd_addr_t rand_addr)

  enumerator BLE_ADDR_TYPE_RPA_PUBLIC

    Resolvable Private Address (RPA) with public identity address

  enumerator BLE_ADDR_TYPE_RPA_RANDOM

    Resolvable Private Address (RPA) with random identity address. To set this address, use the function esp_ble_gap_set_rand_addr(esp_bd_addr_t rand_addr)

enum esp_ble_wl_addr_type_t

  white list address type

  Values:

  enumerator BLE_WL_ADDR_TYPE_PUBLIC

    Public Device Address

  enumerator BLE_WL_ADDR_TYPE_RANDOM

    Random Device Address

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