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This document is not updated for ESP32C6 yet, so some of the content may not be correct.

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GATT DEFINES

API Reference

Header File

components/bt/host/bluedroid/api/include/api/esp_gatt_defs.h

Unions

union esp_gatt_rsp_t

#include <esp_gatt_defs.h>

GATT remote read request response type.

Public Members

esp_gatt_value_t attr_value: Gatt attribute structure

uint16_t handle: Gatt attribute handle

Structures

struct esp_gatt_id_t

Gatt id, include uuid and instance id.

Public Members

esp_bt_uuid_t uuid: UUID

uint8_t inst_id: Instance id

struct esp_gatt_srvc_id_t

Gatt service id, include id (uuid and instance id) and primary flag.

Public Members

esp_gatt_id_t id: Gatt id, include uuid and instance

bool is_primary: This service is primary or not

struct esp_attr_desc_t

Attribute description (used to create database)

Public Members

uint16_t uuid_length: UUID length

uint8_t *uuid_p: UUID value

uint16_t perm: Attribute permission

uint16_t max_length: Maximum length of the element

uint16_t length: Current length of the element

uint8_t *value: Element value array

struct esp_attr_control_t

attribute auto response flag

Public Members

uint8_t auto_rsp: if auto_rsp set to ESP_GATT_RSP_BY_APP, means the response of Write/Read operation will by replied by application. if auto_rsp set to ESP_GATT_AUTO_RSP, means the response of Write/Read operation will be replied by GATT stack automatically.

struct esp_gatts_attr_db_t

attribute type added to the gatt server database

Public Members

esp_attr_control_t attr_control: The attribute control type

esp_attr_desc_t att_desc: The attribute type

struct esp_attr_value_t

set the attribute value type

Public Members

uint16_t attr_max_len: attribute max value length

uint16_t attr_len: attribute current value length

uint8_t *attr_value: the pointer to attribute value

struct esp_gatts_incl_svc_desc_t

Gatt include service entry element.

Public Members

uint16_t start_hdl: Gatt start handle value of included service

uint16_t end_hdl: Gatt end handle value of included service

uint16_t uuid: Gatt attribute value UUID of included service

struct esp_gatts_incl128_svc_desc_t

Gatt include 128 bit service entry element.

Public Members

uint16_t start_hdl: Gatt start handle value of included 128 bit service

uint16_t end_hdl: Gatt end handle value of included 128 bit service

struct esp_gatt_value_t

Gatt attribute value.

Public Members

uint8_t value[ESP_GATT_MAX_ATTR_LEN]: Gatt attribute value

uint16_t handle: Gatt attribute handle

uint16_t offset: Gatt attribute value offset

uint16_t len: Gatt attribute value length

uint8_t auth_req: Gatt authentication request

struct esp_gatt_conn_params_t

Connection parameters information.

Public Members

uint16_t interval: connection interval

uint16_t latency: Slave latency for the connection in number of connection events. Range: 0x0000 to 0x01F3

uint16_t timeout: Supervision timeout for the LE Link. Range: 0x000A to 0x0C80. Mandatory Range: 0x000A to 0x0C80 Time = N * 10 msec Time Range: 100 msec to 32 seconds

struct esp_gattc_multi_t

read multiple attribute

Public Members

uint8_t num_attr: The number of the attribute

uint16_t handles[ESP_GATT_MAX_READ_MULTI_HANDLES]: The handles list

struct esp_gattc_db_elem_t

data base attribute element

Public Members

esp_gatt_db_attr_type_t type: The attribute type

uint16_t attribute_handle: The attribute handle, it’s valid for all of the type

uint16_t start_handle: The service start handle, it’s valid only when the type = ESP_GATT_DB_PRIMARY_SERVICE or ESP_GATT_DB_SECONDARY_SERVICE

uint16_t end_handle: The service end handle, it’s valid only when the type = ESP_GATT_DB_PRIMARY_SERVICE or ESP_GATT_DB_SECONDARY_SERVICE

esp_gatt_char_prop_t properties: The characteristic properties, it’s valid only when the type = ESP_GATT_DB_CHARACTERISTIC

esp_bt_uuid_t uuid: The attribute uuid, it’s valid for all of the type

struct esp_gattc_service_elem_t

service element

Public Members

bool is_primary: The service flag, true if the service is primary service, else is secondary service

uint16_t start_handle: The start handle of the service

uint16_t end_handle: The end handle of the service

esp_bt_uuid_t uuid: The uuid of the service

struct esp_gattc_char_elem_t

characteristic element

Public Members

uint16_t char_handle: The characteristic handle

esp_gatt_char_prop_t properties: The characteristic properties

esp_bt_uuid_t uuid: The characteristic uuid

struct esp_gattc_descr_elem_t

descriptor element

Public Members

uint16_t handle: The characteristic descriptor handle

esp_bt_uuid_t uuid: The characteristic descriptor uuid

struct esp_gattc_incl_svc_elem_t

include service element

Public Members

uint16_t handle: The include service current attribute handle

uint16_t incl_srvc_s_handle: The start handle of the service which has been included

uint16_t incl_srvc_e_handle: The end handle of the service which has been included

esp_bt_uuid_t uuid: The include service uuid

Macros

ESP_GATT_UUID_IMMEDIATE_ALERT_SVC: All “ESP_GATT_UUID_xxx” is attribute types

ESP_GATT_UUID_LINK_LOSS_SVC

ESP_GATT_UUID_TX_POWER_SVC

ESP_GATT_UUID_CURRENT_TIME_SVC

ESP_GATT_UUID_REF_TIME_UPDATE_SVC

ESP_GATT_UUID_NEXT_DST_CHANGE_SVC

ESP_GATT_UUID_GLUCOSE_SVC

ESP_GATT_UUID_HEALTH_THERMOM_SVC

ESP_GATT_UUID_DEVICE_INFO_SVC

ESP_GATT_UUID_HEART_RATE_SVC

ESP_GATT_UUID_PHONE_ALERT_STATUS_SVC

ESP_GATT_UUID_BATTERY_SERVICE_SVC

ESP_GATT_UUID_BLOOD_PRESSURE_SVC

ESP_GATT_UUID_ALERT_NTF_SVC

ESP_GATT_UUID_HID_SVC

ESP_GATT_UUID_SCAN_PARAMETERS_SVC

ESP_GATT_UUID_RUNNING_SPEED_CADENCE_SVC

ESP_GATT_UUID_Automation_IO_SVC

ESP_GATT_UUID_CYCLING_SPEED_CADENCE_SVC

ESP_GATT_UUID_CYCLING_POWER_SVC

ESP_GATT_UUID_LOCATION_AND_NAVIGATION_SVC

ESP_GATT_UUID_ENVIRONMENTAL_SENSING_SVC

ESP_GATT_UUID_BODY_COMPOSITION

ESP_GATT_UUID_USER_DATA_SVC

ESP_GATT_UUID_WEIGHT_SCALE_SVC

ESP_GATT_UUID_BOND_MANAGEMENT_SVC

ESP_GATT_UUID_CONT_GLUCOSE_MONITOR_SVC

ESP_GATT_UUID_PRI_SERVICE

ESP_GATT_UUID_SEC_SERVICE

ESP_GATT_UUID_INCLUDE_SERVICE

ESP_GATT_UUID_CHAR_DECLARE

ESP_GATT_UUID_CHAR_EXT_PROP

ESP_GATT_UUID_CHAR_DESCRIPTION

ESP_GATT_UUID_CHAR_CLIENT_CONFIG

ESP_GATT_UUID_CHAR_SRVR_CONFIG

ESP_GATT_UUID_CHAR_PRESENT_FORMAT

ESP_GATT_UUID_CHAR_AGG_FORMAT

ESP_GATT_UUID_CHAR_VALID_RANGE

ESP_GATT_UUID_EXT_RPT_REF_DESCR

ESP_GATT_UUID_RPT_REF_DESCR

ESP_GATT_UUID_NUM_DIGITALS_DESCR

ESP_GATT_UUID_VALUE_TRIGGER_DESCR

ESP_GATT_UUID_ENV_SENSING_CONFIG_DESCR

ESP_GATT_UUID_ENV_SENSING_MEASUREMENT_DESCR

ESP_GATT_UUID_ENV_SENSING_TRIGGER_DESCR

ESP_GATT_UUID_TIME_TRIGGER_DESCR

ESP_GATT_UUID_GAP_DEVICE_NAME

ESP_GATT_UUID_GAP_ICON

ESP_GATT_UUID_GAP_PREF_CONN_PARAM

ESP_GATT_UUID_GAP_CENTRAL_ADDR_RESOL

ESP_GATT_UUID_GATT_SRV_CHGD

ESP_GATT_UUID_ALERT_LEVEL

ESP_GATT_UUID_TX_POWER_LEVEL

ESP_GATT_UUID_CURRENT_TIME

ESP_GATT_UUID_LOCAL_TIME_INFO

ESP_GATT_UUID_REF_TIME_INFO

ESP_GATT_UUID_NW_STATUS

ESP_GATT_UUID_NW_TRIGGER

ESP_GATT_UUID_ALERT_STATUS

ESP_GATT_UUID_RINGER_CP

ESP_GATT_UUID_RINGER_SETTING

ESP_GATT_UUID_GM_MEASUREMENT

ESP_GATT_UUID_GM_CONTEXT

ESP_GATT_UUID_GM_CONTROL_POINT

ESP_GATT_UUID_GM_FEATURE

ESP_GATT_UUID_SYSTEM_ID

ESP_GATT_UUID_MODEL_NUMBER_STR

ESP_GATT_UUID_SERIAL_NUMBER_STR

ESP_GATT_UUID_FW_VERSION_STR

ESP_GATT_UUID_HW_VERSION_STR

ESP_GATT_UUID_SW_VERSION_STR

ESP_GATT_UUID_MANU_NAME

ESP_GATT_UUID_IEEE_DATA

ESP_GATT_UUID_PNP_ID

ESP_GATT_UUID_HID_INFORMATION

ESP_GATT_UUID_HID_REPORT_MAP

ESP_GATT_UUID_HID_CONTROL_POINT

ESP_GATT_UUID_HID_REPORT

ESP_GATT_UUID_HID_PROTO_MODE

ESP_GATT_UUID_HID_BT_KB_INPUT

ESP_GATT_UUID_HID_BT_KB_OUTPUT

ESP_GATT_UUID_HID_BT_MOUSE_INPUT

ESP_GATT_HEART_RATE_MEAS: Heart Rate Measurement.

ESP_GATT_BODY_SENSOR_LOCATION: Body Sensor Location.

ESP_GATT_HEART_RATE_CNTL_POINT: Heart Rate Control Point.

ESP_GATT_UUID_BATTERY_LEVEL

ESP_GATT_UUID_SC_CONTROL_POINT

ESP_GATT_UUID_SENSOR_LOCATION

ESP_GATT_UUID_RSC_MEASUREMENT

ESP_GATT_UUID_RSC_FEATURE

ESP_GATT_UUID_CSC_MEASUREMENT

ESP_GATT_UUID_CSC_FEATURE

ESP_GATT_UUID_SCAN_INT_WINDOW

ESP_GATT_UUID_SCAN_REFRESH

ESP_GATT_ILLEGAL_UUID: GATT INVALID UUID.

ESP_GATT_ILLEGAL_HANDLE: GATT INVALID HANDLE.

ESP_GATT_ATTR_HANDLE_MAX: GATT attribute max handle.

ESP_GATT_MAX_READ_MULTI_HANDLES

ESP_GATT_PERM_READ: Attribute permissions.

ESP_GATT_PERM_READ_ENCRYPTED

ESP_GATT_PERM_READ_ENC_MITM

ESP_GATT_PERM_WRITE

ESP_GATT_PERM_WRITE_ENCRYPTED

ESP_GATT_PERM_WRITE_ENC_MITM

ESP_GATT_PERM_WRITE_SIGNED

ESP_GATT_PERM_WRITE_SIGNED_MITM

ESP_GATT_PERM_READ_AUTHORIZATION

ESP_GATT_PERM_WRITE_AUTHORIZATION

ESP_GATT_PERM_ENCRYPT_KEY_SIZE(keysize)

ESP_GATT_CHAR_PROP_BIT_BROADCAST

ESP_GATT_CHAR_PROP_BIT_READ

ESP_GATT_CHAR_PROP_BIT_WRITE_NR

ESP_GATT_CHAR_PROP_BIT_WRITE

ESP_GATT_CHAR_PROP_BIT_NOTIFY

ESP_GATT_CHAR_PROP_BIT_INDICATE

ESP_GATT_CHAR_PROP_BIT_AUTH

ESP_GATT_CHAR_PROP_BIT_EXT_PROP

ESP_GATT_MAX_ATTR_LEN: GATT maximum attribute length.

ESP_GATT_RSP_BY_APP

ESP_GATT_AUTO_RSP

ESP_GATT_IF_NONE: If callback report gattc_if/gatts_if as this macro, means this event is not correspond to any app

Type Definitions

typedef uint16_t esp_gatt_perm_t

typedef uint8_t esp_gatt_char_prop_t

typedef uint8_t esp_gatt_if_t: Gatt interface type, different application on GATT client use different gatt_if

Enumerations

enum esp_gatt_prep_write_type

Attribute write data type from the client.

Values:

enumerator ESP_GATT_PREP_WRITE_CANCEL: Prepare write cancel

enumerator ESP_GATT_PREP_WRITE_EXEC: Prepare write execute

enum esp_gatt_status_t

GATT success code and error codes.

Values:

enumerator ESP_GATT_OK

enumerator ESP_GATT_INVALID_HANDLE

enumerator ESP_GATT_READ_NOT_PERMIT

enumerator ESP_GATT_WRITE_NOT_PERMIT

enumerator ESP_GATT_INVALID_PDU

enumerator ESP_GATT_INSUF_AUTHENTICATION

enumerator ESP_GATT_REQ_NOT_SUPPORTED

enumerator ESP_GATT_INVALID_OFFSET

enumerator ESP_GATT_INSUF_AUTHORIZATION

enumerator ESP_GATT_PREPARE_Q_FULL

enumerator ESP_GATT_NOT_FOUND

enumerator ESP_GATT_NOT_LONG

enumerator ESP_GATT_INSUF_KEY_SIZE

enumerator ESP_GATT_INVALID_ATTR_LEN

enumerator ESP_GATT_ERR_UNLIKELY

enumerator ESP_GATT_INSUF_ENCRYPTION

enumerator ESP_GATT_UNSUPPORT_GRP_TYPE

enumerator ESP_GATT_INSUF_RESOURCE

enumerator ESP_GATT_NO_RESOURCES

enumerator ESP_GATT_INTERNAL_ERROR

enumerator ESP_GATT_WRONG_STATE

enumerator ESP_GATT_DB_FULL

enumerator ESP_GATT_BUSY

enumerator ESP_GATT_ERROR

enumerator ESP_GATT_CMD_STARTED

enumerator ESP_GATT_ILLEGAL_PARAMETER

enumerator ESP_GATT_PENDING

enumerator ESP_GATT_AUTH_FAIL

enumerator ESP_GATT_MORE

enumerator ESP_GATT_INVALID_CFG

enumerator ESP_GATT_SERVICE_STARTED

enumerator ESP_GATT_ENCRYPTED_MITM

enumerator ESP_GATT_ENCRYPTED_NO_MITM

enumerator ESP_GATT_NOT_ENCRYPTED

enumerator ESP_GATT_CONGESTED

enumerator ESP_GATT_DUP_REG

enumerator ESP_GATT_ALREADY_OPEN

enumerator ESP_GATT_CANCEL

enumerator ESP_GATT_STACK_RSP

enumerator ESP_GATT_APP_RSP

enumerator ESP_GATT_UNKNOWN_ERROR

enumerator ESP_GATT_CCC_CFG_ERR

enumerator ESP_GATT_PRC_IN_PROGRESS

enumerator ESP_GATT_OUT_OF_RANGE

enum esp_gatt_conn_reason_t

Gatt Connection reason enum.

Values:

enumerator ESP_GATT_CONN_UNKNOWN: Gatt connection unknown

enumerator ESP_GATT_CONN_L2C_FAILURE: General L2cap failure

enumerator ESP_GATT_CONN_TIMEOUT: Connection timeout

enumerator ESP_GATT_CONN_TERMINATE_PEER_USER: Connection terminate by peer user

enumerator ESP_GATT_CONN_TERMINATE_LOCAL_HOST: Connection terminated by local host

enumerator ESP_GATT_CONN_FAIL_ESTABLISH: Connection fail to establish

enumerator ESP_GATT_CONN_LMP_TIMEOUT: Connection fail for LMP response tout

enumerator ESP_GATT_CONN_CONN_CANCEL: L2CAP connection cancelled

enumerator ESP_GATT_CONN_NONE: No connection to cancel

enum esp_gatt_auth_req_t

Gatt authentication request type.

Values:

enumerator ESP_GATT_AUTH_REQ_NONE

enumerator ESP_GATT_AUTH_REQ_NO_MITM

enumerator ESP_GATT_AUTH_REQ_MITM

enumerator ESP_GATT_AUTH_REQ_SIGNED_NO_MITM

enumerator ESP_GATT_AUTH_REQ_SIGNED_MITM

enum esp_service_source_t

Values:

enumerator ESP_GATT_SERVICE_FROM_REMOTE_DEVICE

enumerator ESP_GATT_SERVICE_FROM_NVS_FLASH

enumerator ESP_GATT_SERVICE_FROM_UNKNOWN

enum esp_gatt_write_type_t

Gatt write type.

Values:

enumerator ESP_GATT_WRITE_TYPE_NO_RSP: Gatt write attribute need no response

enumerator ESP_GATT_WRITE_TYPE_RSP: Gatt write attribute need remote response

enum esp_gatt_db_attr_type_t

the type of attribute element

Values:

enumerator ESP_GATT_DB_PRIMARY_SERVICE: Gattc primary service attribute type in the cache

enumerator ESP_GATT_DB_SECONDARY_SERVICE: Gattc secondary service attribute type in the cache

enumerator ESP_GATT_DB_CHARACTERISTIC: Gattc characteristic attribute type in the cache

enumerator ESP_GATT_DB_DESCRIPTOR: Gattc characteristic descriptor attribute type in the cache

enumerator ESP_GATT_DB_INCLUDED_SERVICE: Gattc include service attribute type in the cache

enumerator ESP_GATT_DB_ALL: Gattc all the attribute (primary service & secondary service & include service & char & descriptor) type in the cache

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