// 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.
#ifndef __ESP_GATTC_API_H__
#define __ESP_GATTC_API_H__
#include "esp_bt_defs.h"
#include "esp_gatt_defs.h"
#include "esp_err.h"
#ifdef __cplusplus
extern "C" {
#endif
/// GATT Client callback function events
typedef enum {
ESP_GATTC_REG_EVT = 0, /*!< When GATT client is registered, the event comes */
ESP_GATTC_UNREG_EVT = 1, /*!< When GATT client is unregistered, the event comes */
ESP_GATTC_OPEN_EVT = 2, /*!< When GATT virtual connection is set up, the event comes */
ESP_GATTC_READ_CHAR_EVT = 3, /*!< When GATT characteristic is read, the event comes */
ESP_GATTC_WRITE_CHAR_EVT = 4, /*!< When GATT characteristic write operation completes, the event comes */
ESP_GATTC_CLOSE_EVT = 5, /*!< When GATT virtual connection is closed, the event comes */
ESP_GATTC_SEARCH_CMPL_EVT = 6, /*!< When GATT service discovery is completed, the event comes */
ESP_GATTC_SEARCH_RES_EVT = 7, /*!< When GATT service discovery result is got, the event comes */
ESP_GATTC_READ_DESCR_EVT = 8, /*!< When GATT characteristic descriptor read completes, the event comes */
ESP_GATTC_WRITE_DESCR_EVT = 9, /*!< When GATT characteristic descriptor write completes, the event comes */
ESP_GATTC_NOTIFY_EVT = 10, /*!< When GATT notification or indication arrives, the event comes */
ESP_GATTC_PREP_WRITE_EVT = 11, /*!< When GATT prepare-write operation completes, the event comes */
ESP_GATTC_EXEC_EVT = 12, /*!< When write execution completes, the event comes */
ESP_GATTC_ACL_EVT = 13, /*!< When ACL connection is up, the event comes */
ESP_GATTC_CANCEL_OPEN_EVT = 14, /*!< When GATT client ongoing connection is cancelled, the event comes */
ESP_GATTC_SRVC_CHG_EVT = 15, /*!< When "service changed" occurs, the event comes */
ESP_GATTC_ENC_CMPL_CB_EVT = 17, /*!< When encryption procedure completes, the event comes */
ESP_GATTC_CFG_MTU_EVT = 18, /*!< When configuration of MTU completes, the event comes */
ESP_GATTC_ADV_DATA_EVT = 19, /*!< When advertising of data, the event comes */
ESP_GATTC_MULT_ADV_ENB_EVT = 20, /*!< When multi-advertising is enabled, the event comes */
ESP_GATTC_MULT_ADV_UPD_EVT = 21, /*!< When multi-advertising parameters are updated, the event comes */
ESP_GATTC_MULT_ADV_DATA_EVT = 22, /*!< When multi-advertising data arrives, the event comes */
ESP_GATTC_MULT_ADV_DIS_EVT = 23, /*!< When multi-advertising is disabled, the event comes */
ESP_GATTC_CONGEST_EVT = 24, /*!< When GATT connection congestion comes, the event comes */
ESP_GATTC_BTH_SCAN_ENB_EVT = 25, /*!< When batch scan is enabled, the event comes */
ESP_GATTC_BTH_SCAN_CFG_EVT = 26, /*!< When batch scan storage is configured, the event comes */
ESP_GATTC_BTH_SCAN_RD_EVT = 27, /*!< When Batch scan read event is reported, the event comes */
ESP_GATTC_BTH_SCAN_THR_EVT = 28, /*!< When Batch scan threshold is set, the event comes */
ESP_GATTC_BTH_SCAN_PARAM_EVT = 29, /*!< When Batch scan parameters are set, the event comes */
ESP_GATTC_BTH_SCAN_DIS_EVT = 30, /*!< When Batch scan is disabled, the event comes */
ESP_GATTC_SCAN_FLT_CFG_EVT = 31, /*!< When Scan filter configuration completes, the event comes */
ESP_GATTC_SCAN_FLT_PARAM_EVT = 32, /*!< When Scan filter parameters are set, the event comes */
ESP_GATTC_SCAN_FLT_STATUS_EVT = 33, /*!< When Scan filter status is reported, the event comes */
ESP_GATTC_ADV_VSC_EVT = 34, /*!< When advertising vendor spec content event is reported, the event comes */
ESP_GATTC_GET_CHAR_EVT = 35, /*!< When characteristic is got from GATT server, the event comes */
ESP_GATTC_GET_DESCR_EVT = 36, /*!< When characteristic descriptor is got from GATT server, the event comes */
ESP_GATTC_GET_INCL_SRVC_EVT = 37, /*!< When included service is got from GATT server, the event comes */
ESP_GATTC_REG_FOR_NOTIFY_EVT = 38, /*!< When register for notification of a service completes, the event comes */
ESP_GATTC_UNREG_FOR_NOTIFY_EVT = 39, /*!< When unregister for notification of a service completes, the event comes */
ESP_GATTC_CONNECT_EVT = 40, /*!< When the ble physical connection is set up, the event comes */
ESP_GATTC_DISCONNECT_EVT = 41, /*!< When the ble physical connection disconnected, the event comes */
} esp_gattc_cb_event_t;
/// Maximum Transmission Unit used in GATT
#define ESP_GATT_DEF_BLE_MTU_SIZE 23
/// Maximum Transmission Unit allowed in GATT
#define ESP_GATT_MAX_MTU_SIZE 517
/**
* @brief Gatt client callback parameters union
*/
typedef union {
/**
* @brief ESP_GATTC_REG_EVT
*/
struct gattc_reg_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t app_id; /*!< Application id which input in register API */
} reg; /*!< Gatt client callback param of ESP_GATTC_REG_EVT */
/**
* @brief ESP_GATTC_OPEN_EVT
*/
struct gattc_open_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_bd_addr_t remote_bda; /*!< Remote bluetooth device address */
uint16_t mtu; /*!< MTU size */
} open; /*!< Gatt client callback param of ESP_GATTC_OPEN_EVT */
/**
* @brief ESP_GATTC_CLOSE_EVT
*/
struct gattc_close_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_bd_addr_t remote_bda; /*!< Remote bluetooth device address */
esp_gatt_conn_reason_t reason; /*!< The reason of gatt connection close */
} close; /*!< Gatt client callback param of ESP_GATTC_CLOSE_EVT */
/**
* @brief ESP_GATTC_CFG_MTU_EVT
*/
struct gattc_cfg_mtu_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
uint16_t mtu; /*!< MTU size */
} cfg_mtu; /*!< Gatt client callback param of ESP_GATTC_CFG_MTU_EVT */
/**
* @brief ESP_GATTC_SEARCH_CMPL_EVT
*/
struct gattc_search_cmpl_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
} search_cmpl; /*!< Gatt client callback param of ESP_GATTC_SEARCH_CMPL_EVT */
/**
* @brief ESP_GATTC_SEARCH_RES_EVT
*/
struct gattc_search_res_evt_param {
uint16_t conn_id; /*!< Connection id */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
} search_res; /*!< Gatt client callback param of ESP_GATTC_SEARCH_RES_EVT */
/**
* @brief ESP_GATTC_READ_CHAR_EVT, ESP_GATTC_READ_DESCR_EVT
*/
struct gattc_read_char_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
esp_gatt_id_t char_id; /*!< Characteristic id, include characteristic uuid and other information */
esp_gatt_id_t descr_id; /*!< Descriptor id, include descriptor uuid and other information */
uint8_t *value; /*!< Characteristic value */
uint16_t value_type; /*!< Characteristic value type, there is two value for this type:
ESP_GATTC_READ_VALUE_TYPE_VALUE(0x0000) and
ESP_GATTC_READ_VALUE_TYPE_AGG_FORMAT(0x2905).
If the value is ESP_GATTC_READ_VALUE_TYPE_VALUE means it is a generally
value type, and if is the type of ESP_GATTC_READ_VALUE_TYPE_AGG_FORMAT,
the unit of the value will indicate in the Characteristic
aggregate format descriptor */
uint16_t value_len; /*!< Characteristic value length */
} read; /*!< Gatt client callback param of ESP_GATTC_READ_CHAR_EVT */
/**
* @brief ESP_GATTC_WRITE_CHAR_EVT, ESP_GATTC_PREP_WRITE_EVT, ESP_GATTC_WRITE_DESCR_EVT
*/
struct gattc_write_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
esp_gatt_id_t char_id; /*!< Characteristic id, include characteristic uuid and other information */
esp_gatt_id_t descr_id; /*!< Descriptor id, include descriptor uuid and other information */
} write; /*!< Gatt client callback param of ESP_GATTC_WRITE_DESCR_EVT */
/**
* @brief ESP_GATTC_EXEC_EVT
*/
struct gattc_exec_cmpl_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
} exec_cmpl; /*!< Gatt client callback param of ESP_GATTC_EXEC_EVT */
/**
* @brief ESP_GATTC_NOTIFY_EVT
*/
struct gattc_notify_evt_param {
uint16_t conn_id; /*!< Connection id */
esp_bd_addr_t remote_bda; /*!< Remote bluetooth device address */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
esp_gatt_id_t char_id; /*!< Characteristic id, include characteristic uuid and other information */
esp_gatt_id_t descr_id; /*!< Descriptor id, include descriptor uuid and other information */
uint16_t value_len; /*!< Notify attribute value */
uint8_t *value; /*!< Notify attribute value */
bool is_notify; /*!< True means notify, false means indicate */
} notify; /*!< Gatt client callback param of ESP_GATTC_NOTIFY_EVT */
/**
* @brief ESP_GATTC_SRVC_CHG_EVT
*/
struct gattc_srvc_chg_evt_param {
esp_bd_addr_t remote_bda; /*!< Remote bluetooth device address */
} srvc_chg; /*!< Gatt client callback param of ESP_GATTC_SRVC_CHG_EVT */
/**
* @brief ESP_GATTC_CONGEST_EVT
*/
struct gattc_congest_evt_param {
uint16_t conn_id; /*!< Connection id */
bool congested; /*!< Congested or not */
} congest; /*!< Gatt client callback param of ESP_GATTC_CONGEST_EVT */
/**
* @brief ESP_GATTC_GET_CHAR_EVT
*/
struct gattc_get_char_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
esp_gatt_id_t char_id; /*!< Characteristic id, include characteristic uuid and other information */
esp_gatt_char_prop_t char_prop; /*!< Characteristic property */
} get_char; /*!< Gatt client callback param of ESP_GATTC_GET_CHAR_EVT */
/**
* @brief ESP_GATTC_GET_DESCR_EVT
*/
struct gattc_get_descr_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
esp_gatt_id_t char_id; /*!< Characteristic id, include characteristic uuid and other information */
esp_gatt_id_t descr_id; /*!< Descriptor id, include descriptor uuid and other information */
} get_descr; /*!< Gatt client callback param of ESP_GATTC_GET_DESCR_EVT */
/**
* @brief ESP_GATTC_GET_INCL_SRVC_EVT
*/
struct gattc_get_incl_srvc_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
esp_gatt_srvc_id_t incl_srvc_id;/*!< Included service id, include service uuid and other information */
} get_incl_srvc; /*!< Gatt client callback param of ESP_GATTC_GET_INCL_SRVC_EVT */
/**
* @brief ESP_GATTC_REG_FOR_NOTIFY_EVT
*/
struct gattc_reg_for_notify_evt_param {
esp_gatt_status_t status; /*!< Operation status */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
esp_gatt_id_t char_id; /*!< Characteristic id, include characteristic uuid and other information */
} reg_for_notify; /*!< Gatt client callback param of ESP_GATTC_REG_FOR_NOTIFY_EVT */
/**
* @brief ESP_GATTC_UNREG_FOR_NOTIFY_EVT
*/
struct gattc_unreg_for_notify_evt_param {
esp_gatt_status_t status; /*!< Operation status */
esp_gatt_srvc_id_t srvc_id; /*!< Service id, include service uuid and other information */
esp_gatt_id_t char_id; /*!< Characteristic id, include characteristic uuid and other information */
} unreg_for_notify; /*!< Gatt client callback param of ESP_GATTC_UNREG_FOR_NOTIFY_EVT */
/**
* @brief ESP_GATTC_CONNECT_EVT
*/
struct gattc_connect_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_bd_addr_t remote_bda; /*!< Remote bluetooth device address */
} connect; /*!< Gatt client callback param of ESP_GATTC_CONNECT_EVT */
/**
* @brief ESP_GATTC_DISCONNECT_EVT
*/
struct gattc_disconnect_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
esp_bd_addr_t remote_bda; /*!< Remote bluetooth device address */
} disconnect; /*!< Gatt client callback param of ESP_GATTC_DISCONNECT_EVT */
} esp_ble_gattc_cb_param_t; /*!< GATT client callback parameter union type */
/**
* @brief GATT Client callback function type
* @param event : Event type
* @param gatts_if : GATT client access interface, normally
* different gattc_if correspond to different profile
* @param param : Point to callback parameter, currently is union type
*/
typedef void (* esp_gattc_cb_t)(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param);
/**
* @brief This function is called to register application callbacks
* with GATTC module.
*
* @param[in] callback : pointer to the application callback function.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_register_callback(esp_gattc_cb_t callback);
/**
* @brief This function is called to register application callbacks
* with GATTC module.
*
* @param[in] app_id : Application Identify (UUID), for different application
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_app_register(uint16_t app_id);
/**
* @brief This function is called to unregister an application
* from GATTC module.
*
* @param[in] gattc_if: Gatt client access interface.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_app_unregister(esp_gatt_if_t gattc_if);
/**
* @brief Open a direct connection or add a background auto connection
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] remote_bda: remote device bluetooth device address.
* @param[in] is_direct: direct connection or background auto connection
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_open(esp_gatt_if_t gattc_if, esp_bd_addr_t remote_bda, bool is_direct);
/**
* @brief Close a virtual connection to a GATT server. gattc maybe have multiple virtual GATT server connections when multiple app_id registed,
* this API only close one virtual GATT server connection. if there exist other virtual GATT server connections,
* it does not disconnect the physical connection.
* if you want to disconnect the physical connection directly, you can use esp_ble_gap_disconnect(esp_bd_addr_t remote_device).
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id: connection ID to be closed.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_close (esp_gatt_if_t gattc_if, uint16_t conn_id);
/**
* @brief Configure the MTU size in the GATT channel. This can be done
* only once per connection.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id: connection ID.
* @param[in] mtu: desired MTU size to use.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_config_mtu (esp_gatt_if_t gattc_if, uint16_t conn_id, uint16_t mtu);
/**
* @brief This function is called to request a GATT service discovery
* on a GATT server. This function report service search result
* by a callback event, and followed by a service search complete
* event.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id: connection ID.
* @param[in] filter_uuid: a UUID of the service application is interested in.
* If Null, discover for all services.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_search_service(esp_gatt_if_t gattc_if, uint16_t conn_id, esp_bt_uuid_t *filter_uuid);
/**
* @brief This function is called to find the first characteristic of the
* service on the given server.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id: connection ID which identify the server.
* @param[in] srvc_id: service ID
* @param[in] start_char_id: the start characteristic ID
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_get_characteristic(esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *start_char_id);
/**
* @brief This function is called to find the descriptor of the
* service on the given server.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id: connection ID which identify the server.
* @param[in] srvc_id: the service ID of which the characteristic is belonged to.
* @param[in] char_id: Characteristic ID, if NULL find the first available
* characteristic.
* @param[in] start_descr_id: the start descriptor id
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_get_descriptor(esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id,
esp_gatt_id_t *start_descr_id);
/**
* @brief This function is called to find the first characteristic of the
* service on the given server.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id: connection ID which identify the server.
* @param[in] srvc_id: the service ID of which the characteristic is belonged to.
* @param[in] start_incl_srvc_id: the start include service id
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_get_included_service(esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_srvc_id_t *start_incl_srvc_id);
/**
* @brief This function is called to read a service's characteristics of
* the given characteristic ID
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id : connection ID.
* @param[in] srvc_id : service ID.
* @param[in] char_id : characteristic ID to read.
* @param[in] auth_req : authenticate request type
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_read_char (esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id,
esp_gatt_auth_req_t auth_req);
/**
* @brief This function is called to read a characteristics descriptor.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id : connection ID.
* @param[in] srvc_id : service ID.
* @param[in] char_id : characteristic ID to read.
* @param[in] descr_id : characteristic descriptor ID to read.
* @param[in] auth_req : authenticate request type
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_read_char_descr (esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id,
esp_gatt_id_t *descr_id,
esp_gatt_auth_req_t auth_req);
/**
* @brief This function is called to write characteristic value.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id : connection ID.
* @param[in] srvc_id : service ID.
* @param[in] char_id : characteristic ID to write.
* @param[in] value_len: length of the value to be written.
* @param[in] value : the value to be written.
* @param[in] write_type : the type of attribute write operation.
* @param[in] auth_req : authentication request.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_write_char( esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id,
uint16_t value_len,
uint8_t *value,
esp_gatt_write_type_t write_type,
esp_gatt_auth_req_t auth_req);
/**
* @brief This function is called to write characteristic descriptor value.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id : connection ID
* @param[in] srvc_id : service ID.
* @param[in] char_id : characteristic ID.
* @param[in] descr_id : characteristic descriptor ID to write.
* @param[in] value_len: length of the value to be written.
* @param[in] value : the value to be written.
* @param[in] write_type : the type of attribute write operation.
* @param[in] auth_req : authentication request.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_write_char_descr (esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id,
esp_gatt_id_t *descr_id,
uint16_t value_len,
uint8_t *value,
esp_gatt_write_type_t write_type,
esp_gatt_auth_req_t auth_req);
/**
* @brief This function is called to prepare write a characteristic value.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id : connection ID.
* @param[in] srvc_id : service ID.
* @param[in] char_id : GATT characteristic ID of the service.
* @param[in] offset : offset of the write value.
* @param[in] value_len: length of the value to be written.
* @param[in] value : the value to be written.
* @param[in] auth_req : authentication request.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_prepare_write(esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id,
uint16_t offset,
uint16_t value_len,
uint8_t *value,
esp_gatt_auth_req_t auth_req);
/**
* @brief This function is called to prepare write a characteristic descriptor value.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id : connection ID.
* @param[in] srvc_id : service ID.
* @param[in] char_id : GATT characteristic ID of the service.
* @param[in] descr_id : characteristic descriptor ID to write.
* @param[in] offset : offset of the write value.
* @param[in] value_len: length of the value to be written.
* @param[in] value : the value to be written.
* @param[in] auth_req : authentication request.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_prepare_write_char_descr(esp_gatt_if_t gattc_if,
uint16_t conn_id,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id,
esp_gatt_id_t *descr_id,
uint16_t offset,
uint16_t value_len,
uint8_t *value,
esp_gatt_auth_req_t auth_req);
/**
* @brief This function is called to execute write a prepare write sequence.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] conn_id : connection ID.
* @param[in] is_execute : execute or cancel.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_execute_write (esp_gatt_if_t gattc_if, uint16_t conn_id, bool is_execute);
/**
* @brief This function is called to register for notification of a service.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] server_bda : target GATT server.
* @param[in] srvc_id : pointer to GATT service ID.
* @param[in] char_id : pointer to GATT characteristic ID.
*
* @return
* - ESP_OK: registration succeeds
* - other: failed
*
*/
esp_err_t esp_ble_gattc_register_for_notify (esp_gatt_if_t gattc_if,
esp_bd_addr_t server_bda,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id);
/**
* @brief This function is called to de-register for notification of a service.
*
* @param[in] gattc_if: Gatt client access interface.
* @param[in] server_bda : target GATT server.
* @param[in] srvc_id : pointer to GATT service ID.
* @param[in] char_id : pointer to GATT characteristic ID.
*
* @return
* - ESP_OK: unregister succeeds
* - other: failed
*
*/
esp_err_t esp_ble_gattc_unregister_for_notify (esp_gatt_if_t gattc_if,
esp_bd_addr_t server_bda,
esp_gatt_srvc_id_t *srvc_id,
esp_gatt_id_t *char_id);
/**
* @brief Refresh the server cache store in the gattc stack of the remote device
*
* @param[in] remote_bda: remote device BD address.
*
* @return
* - ESP_OK: success
* - other: failed
*
*/
esp_err_t esp_ble_gattc_cache_refresh(esp_bd_addr_t remote_bda);
#ifdef __cplusplus
}
#endif
#endif /* __ESP_GATTC_API_H__ */