// 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_GATTS_API_H__
#define __ESP_GATTS_API_H__
#include "esp_bt_defs.h"
#include "esp_gatt_defs.h"
#include "esp_err.h"
#ifdef __cplusplus
extern "C" {
#endif
/// GATT Server callback function events
typedef enum {
ESP_GATTS_REG_EVT = 0, /*!< When register application id, the event comes */
ESP_GATTS_READ_EVT = 1, /*!< When gatt client request read operation, the event comes */
ESP_GATTS_WRITE_EVT = 2, /*!< When gatt client request write operation, the event comes */
ESP_GATTS_EXEC_WRITE_EVT = 3, /*!< When gatt client request execute write, the event comes */
ESP_GATTS_MTU_EVT = 4, /*!< When set mtu complete, the event comes */
ESP_GATTS_CONF_EVT = 5, /*!< When receive confirm, the event comes */
ESP_GATTS_UNREG_EVT = 6, /*!< When unregister application id, the event comes */
ESP_GATTS_CREATE_EVT = 7, /*!< When create service complete, the event comes */
ESP_GATTS_ADD_INCL_SRVC_EVT = 8, /*!< When add included service complete, the event comes */
ESP_GATTS_ADD_CHAR_EVT = 9, /*!< When add characteristic complete, the event comes */
ESP_GATTS_ADD_CHAR_DESCR_EVT = 10, /*!< When add descriptor complete, the event comes */
ESP_GATTS_DELETE_EVT = 11, /*!< When delete service complete, the event comes */
ESP_GATTS_START_EVT = 12, /*!< When start service complete, the event comes */
ESP_GATTS_STOP_EVT = 13, /*!< When stop service complete, the event comes */
ESP_GATTS_CONNECT_EVT = 14, /*!< When gatt client connect, the event comes */
ESP_GATTS_DISCONNECT_EVT = 15, /*!< When gatt client disconnect, the event comes */
ESP_GATTS_OPEN_EVT = 16, /*!< When connect to peer, the event comes */
ESP_GATTS_CANCEL_OPEN_EVT = 17, /*!< When disconnect from peer, the event comes */
ESP_GATTS_CLOSE_EVT = 18, /*!< When gatt server close, the event comes */
ESP_GATTS_LISTEN_EVT = 19, /*!< When gatt listen to be connected the event comes */
ESP_GATTS_CONGEST_EVT = 20, /*!< When congest happen, the event comes */
/* following is extra event */
ESP_GATTS_RESPONSE_EVT = 21, /*!< When gatt send response complete, the event comes */
ESP_GATTS_CREAT_ATTR_TAB_EVT = 22, /*!< When gatt create table complete, the event comes */
ESP_GATTS_SET_ATTR_VAL_EVT = 23, /*!< When gatt set attr value complete, the event comes */
ESP_GATTS_SEND_SERVICE_CHANGE_EVT = 24, /*!< When gatt send service change indication complete, the event comes */
} esp_gatts_cb_event_t;
/**
* @brief Gatt server callback parameters union
*/
typedef union {
/**
* @brief ESP_GATTS_REG_EVT
*/
struct gatts_reg_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t app_id; /*!< Application id which input in register API */
} reg; /*!< Gatt server callback param of ESP_GATTS_REG_EVT */
/**
* @brief ESP_GATTS_READ_EVT
*/
struct gatts_read_evt_param {
uint16_t conn_id; /*!< Connection id */
uint32_t trans_id; /*!< Transfer id */
esp_bd_addr_t bda; /*!< The bluetooth device address which been read */
uint16_t handle; /*!< The attribute handle */
uint16_t offset; /*!< Offset of the value, if the value is too long */
bool is_long; /*!< The value is too long or not */
bool need_rsp; /*!< The read operation need to do response */
} read; /*!< Gatt server callback param of ESP_GATTS_READ_EVT */
/**
* @brief ESP_GATTS_WRITE_EVT
*/
struct gatts_write_evt_param {
uint16_t conn_id; /*!< Connection id */
uint32_t trans_id; /*!< Transfer id */
esp_bd_addr_t bda; /*!< The bluetooth device address which been written */
uint16_t handle; /*!< The attribute handle */
uint16_t offset; /*!< Offset of the value, if the value is too long */
bool need_rsp; /*!< The write operation need to do response */
bool is_prep; /*!< This write operation is prepare write */
uint16_t len; /*!< The write attribute value length */
uint8_t *value; /*!< The write attribute value */
} write; /*!< Gatt server callback param of ESP_GATTS_WRITE_EVT */
/**
* @brief ESP_GATTS_EXEC_WRITE_EVT
*/
struct gatts_exec_write_evt_param {
uint16_t conn_id; /*!< Connection id */
uint32_t trans_id; /*!< Transfer id */
esp_bd_addr_t bda; /*!< The bluetooth device address which been written */
#define ESP_GATT_PREP_WRITE_CANCEL 0x00 /*!< Prepare write flag to indicate cancel prepare write */
#define ESP_GATT_PREP_WRITE_EXEC 0x01 /*!< Prepare write flag to indicate execute prepare write */
uint8_t exec_write_flag; /*!< Execute write flag */
} exec_write; /*!< Gatt server callback param of ESP_GATTS_EXEC_WRITE_EVT */
/**
* @brief ESP_GATTS_MTU_EVT
*/
struct gatts_mtu_evt_param {
uint16_t conn_id; /*!< Connection id */
uint16_t mtu; /*!< MTU size */
} mtu; /*!< Gatt server callback param of ESP_GATTS_MTU_EVT */
/**
* @brief ESP_GATTS_CONF_EVT
*/
struct gatts_conf_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
uint16_t handle; /*!< attribute handle */
uint16_t len; /*!< The indication or notification value length, len is valid when send notification or indication failed */
uint8_t *value; /*!< The indication or notification value , value is valid when send notification or indication failed */
} conf; /*!< Gatt server callback param of ESP_GATTS_CONF_EVT (confirm) */
/**
* @brief ESP_GATTS_UNREG_EVT
*/
/**
* @brief ESP_GATTS_CREATE_EVT
*/
struct gatts_create_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t service_handle; /*!< Service attribute handle */
esp_gatt_srvc_id_t service_id; /*!< Service id, include service uuid and other information */
} create; /*!< Gatt server callback param of ESP_GATTS_CREATE_EVT */
/**
* @brief ESP_GATTS_ADD_INCL_SRVC_EVT
*/
struct gatts_add_incl_srvc_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t attr_handle; /*!< Included service attribute handle */
uint16_t service_handle; /*!< Service attribute handle */
} add_incl_srvc; /*!< Gatt server callback param of ESP_GATTS_ADD_INCL_SRVC_EVT */
/**
* @brief ESP_GATTS_ADD_CHAR_EVT
*/
struct gatts_add_char_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t attr_handle; /*!< Characteristic attribute handle */
uint16_t service_handle; /*!< Service attribute handle */
esp_bt_uuid_t char_uuid; /*!< Characteristic uuid */
} add_char; /*!< Gatt server callback param of ESP_GATTS_ADD_CHAR_EVT */
/**
* @brief ESP_GATTS_ADD_CHAR_DESCR_EVT
*/
struct gatts_add_char_descr_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t attr_handle; /*!< Descriptor attribute handle */
uint16_t service_handle; /*!< Service attribute handle */
esp_bt_uuid_t descr_uuid; /*!< Characteristic descriptor uuid */
} add_char_descr; /*!< Gatt server callback param of ESP_GATTS_ADD_CHAR_DESCR_EVT */
/**
* @brief ESP_GATTS_DELETE_EVT
*/
struct gatts_delete_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t service_handle; /*!< Service attribute handle */
} del; /*!< Gatt server callback param of ESP_GATTS_DELETE_EVT */
/**
* @brief ESP_GATTS_START_EVT
*/
struct gatts_start_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t service_handle; /*!< Service attribute handle */
} start; /*!< Gatt server callback param of ESP_GATTS_START_EVT */
/**
* @brief ESP_GATTS_STOP_EVT
*/
struct gatts_stop_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t service_handle; /*!< Service attribute handle */
} stop; /*!< Gatt server callback param of ESP_GATTS_STOP_EVT */
/**
* @brief ESP_GATTS_CONNECT_EVT
*/
struct gatts_connect_evt_param {
uint16_t conn_id; /*!< Connection id */
esp_bd_addr_t remote_bda; /*!< Remote bluetooth device address */
} connect; /*!< Gatt server callback param of ESP_GATTS_CONNECT_EVT */
/**
* @brief ESP_GATTS_DISCONNECT_EVT
*/
struct gatts_disconnect_evt_param {
uint16_t conn_id; /*!< Connection id */
esp_bd_addr_t remote_bda; /*!< Remote bluetooth device address */
esp_gatt_conn_reason_t reason; /*!< Indicate the reason of disconnection */
} disconnect; /*!< Gatt server callback param of ESP_GATTS_DISCONNECT_EVT */
/**
* @brief ESP_GATTS_OPEN_EVT
*/
struct gatts_open_evt_param {
esp_gatt_status_t status; /*!< Operation status */
} open; /*!< Gatt server callback param of ESP_GATTS_OPEN_EVT */
/**
* @brief ESP_GATTS_CANCEL_OPEN_EVT
*/
struct gatts_cancel_open_evt_param {
esp_gatt_status_t status; /*!< Operation status */
} cancel_open; /*!< Gatt server callback param of ESP_GATTS_CANCEL_OPEN_EVT */
/**
* @brief ESP_GATTS_CLOSE_EVT
*/
struct gatts_close_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t conn_id; /*!< Connection id */
} close; /*!< Gatt server callback param of ESP_GATTS_CLOSE_EVT */
/**
* @brief ESP_GATTS_LISTEN_EVT
*/
/**
* @brief ESP_GATTS_CONGEST_EVT
*/
struct gatts_congest_evt_param {
uint16_t conn_id; /*!< Connection id */
bool congested; /*!< Congested or not */
} congest; /*!< Gatt server callback param of ESP_GATTS_CONGEST_EVT */
/**
* @brief ESP_GATTS_RESPONSE_EVT
*/
struct gatts_rsp_evt_param {
esp_gatt_status_t status; /*!< Operation status */
uint16_t handle; /*!< Attribute handle which send response */
} rsp; /*!< Gatt server callback param of ESP_GATTS_RESPONSE_EVT */
/**
* @brief ESP_GATTS_CREAT_ATTR_TAB_EVT
*/
struct gatts_add_attr_tab_evt_param{
esp_gatt_status_t status; /*!< Operation status */
esp_bt_uuid_t svc_uuid; /*!< Service uuid type */
uint16_t num_handle; /*!< The number of the attribute handle to be added to the gatts database */
uint16_t *handles; /*!< The number to the handles */
} add_attr_tab; /*!< Gatt server callback param of ESP_GATTS_CREAT_ATTR_TAB_EVT */
/**
* @brief ESP_GATTS_SET_ATTR_VAL_EVT
*/
struct gatts_set_attr_val_evt_param{
uint16_t srvc_handle; /*!< The service handle */
uint16_t attr_handle; /*!< The attribute handle */
esp_gatt_status_t status; /*!< Operation status*/
} set_attr_val; /*!< Gatt server callback param of ESP_GATTS_SET_ATTR_VAL_EVT */
/**
* @brief ESP_GATTS_SEND_SERVICE_CHANGE_EVT
*/
struct gatts_send_service_change_evt_param{
esp_gatt_status_t status; /*!< Operation status*/
} service_change; /*!< Gatt server callback param of ESP_GATTS_SEND_SERVICE_CHANGE_EVT */
} esp_ble_gatts_cb_param_t;
/**
* @brief GATT Server callback function type
* @param event : Event type
* @param gatts_if : GATT server access interface, normally
* different gatts_if correspond to different profile
* @param param : Point to callback parameter, currently is union type
*/
typedef void (* esp_gatts_cb_t)(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param);
/**
* @brief This function is called to register application callbacks
* with BTA GATTS module.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_register_callback(esp_gatts_cb_t callback);
/**
* @brief This function is called to register application identifier
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_app_register(uint16_t app_id);
/**
* @brief unregister with GATT Server.
*
* @param[in] gatts_if: GATT server access interface
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_app_unregister(esp_gatt_if_t gatts_if);
/**
* @brief Create a service. When service creation is done, a callback
* event BTA_GATTS_CREATE_SRVC_EVT is called to report status
* and service ID to the profile. The service ID obtained in
* the callback function needs to be used when adding included
* service and characteristics/descriptors into the service.
*
* @param[in] gatts_if: GATT server access interface
* @param[in] service_id: service ID.
* @param[in] num_handle: number of handle requested for this service.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_create_service(esp_gatt_if_t gatts_if,
esp_gatt_srvc_id_t *service_id, uint16_t num_handle);
/**
* @brief Create a service attribute tab.
* @param[in] gatts_attr_db: the pointer to the service attr tab
* @param[in] gatts_if: GATT server access interface
* @param[in] max_nb_attr: the number of attribute to be added to the service database.
* @param[in] srvc_inst_id: the instance id of the service
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_create_attr_tab(const esp_gatts_attr_db_t *gatts_attr_db,
esp_gatt_if_t gatts_if,
uint8_t max_nb_attr,
uint8_t srvc_inst_id);
/**
* @brief This function is called to add an included service. This function have to be called between
* 'esp_ble_gatts_create_service' and 'esp_ble_gatts_add_char'. After included
* service is included, a callback event BTA_GATTS_ADD_INCL_SRVC_EVT
* is reported the included service ID.
*
* @param[in] service_handle: service handle to which this included service is to
* be added.
* @param[in] included_service_handle: the service ID to be included.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_add_included_service(uint16_t service_handle, uint16_t included_service_handle);
/**
* @brief This function is called to add a characteristic into a service.
*
* @param[in] service_handle: service handle to which this included service is to
* be added.
* @param[in] char_uuid : Characteristic UUID.
* @param[in] perm : Characteristic value declaration attribute permission.
* @param[in] property : Characteristic Properties
* @param[in] char_val : Characteristic value
* @param[in] control : attribute response control byte
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_add_char(uint16_t service_handle, esp_bt_uuid_t *char_uuid,
esp_gatt_perm_t perm, esp_gatt_char_prop_t property, esp_attr_value_t *char_val,
esp_attr_control_t *control);
/**
* @brief This function is called to add characteristic descriptor. When
* it's done, a callback event BTA_GATTS_ADD_DESCR_EVT is called
* to report the status and an ID number for this descriptor.
*
* @param[in] service_handle: service handle to which this characteristic descriptor is to
* be added.
* @param[in] perm: descriptor access permission.
* @param[in] descr_uuid: descriptor UUID.
* @param[in] char_descr_val : Characteristic descriptor value
* @param[in] control : attribute response control byte
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_add_char_descr (uint16_t service_handle,
esp_bt_uuid_t *descr_uuid,
esp_gatt_perm_t perm, esp_attr_value_t *char_descr_val,
esp_attr_control_t *control);
/**
* @brief This function is called to delete a service. When this is done,
* a callback event BTA_GATTS_DELETE_EVT is report with the status.
*
* @param[in] service_handle: service_handle to be deleted.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_delete_service(uint16_t service_handle);
/**
* @brief This function is called to start a service.
*
* @param[in] service_handle: the service handle to be started.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_start_service(uint16_t service_handle);
/**
* @brief This function is called to stop a service.
*
* @param[in] service_handle - service to be topped.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_stop_service(uint16_t service_handle);
/**
* @brief Send indicate or notify to GATT client.
* Set param need_confirm as false will send notification, otherwise indication.
*
* @param[in] gatts_if: GATT server access interface
* @param[in] conn_id - connection id to indicate.
* @param[in] attr_handle - attribute handle to indicate.
* @param[in] value_len - indicate value length.
* @param[in] value: value to indicate.
* @param[in] need_confirm - Whether a confirmation is required.
* false sends a GATT notification, true sends a GATT indication.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_send_indicate(esp_gatt_if_t gatts_if, uint16_t conn_id, uint16_t attr_handle,
uint16_t value_len, uint8_t *value, bool need_confirm);
/**
* @brief This function is called to send a response to a request.
*
* @param[in] gatts_if: GATT server access interface
* @param[in] conn_id - connection identifier.
* @param[in] trans_id - transfer id
* @param[in] status - response status
* @param[in] rsp - response data.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_send_response(esp_gatt_if_t gatts_if, uint16_t conn_id, uint32_t trans_id,
esp_gatt_status_t status, esp_gatt_rsp_t *rsp);
/**
* @brief This function is called to set the attribute value by the application
*
* @param[in] attr_handle: the attribute handle which to be set
* @param[in] length: the value length
* @param[in] value: the pointer to the attribute value
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_set_attr_value(uint16_t attr_handle, uint16_t length, const uint8_t *value);
/**
* @brief Retrieve attribute value
*
* @param[in] attr_handle: Attribute handle.
* @param[out] length: pointer to the attribute value length
* @param[out] value: Pointer to attribute value payload, the value cannot be modified by user
*
* @return
* - ESP_GATT_OK : success
* - other : failed
*
*/
esp_gatt_status_t esp_ble_gatts_get_attr_value(uint16_t attr_handle, uint16_t *length, const uint8_t **value);
/**
* @brief Open a direct open connection or add a background auto connection
*
* @param[in] gatts_if: GATT server 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_gatts_open(esp_gatt_if_t gatts_if, esp_bd_addr_t remote_bda, bool is_direct);
/**
* @brief Close a connection a remote device.
*
* @param[in] gatts_if: GATT server access interface
* @param[in] conn_id: connection ID to be closed.
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_close(esp_gatt_if_t gatts_if, uint16_t conn_id);
/**
* @brief Send service change indication
*
* @param[in] gatts_if: GATT server access interface
* @param[in] remote_bda: remote device bluetooth device address.
* If remote_bda is NULL then it will send service change
* indication to all the connected devices and if not then
* to a specific device
*
* @return
* - ESP_OK : success
* - other : failed
*
*/
esp_err_t esp_ble_gatts_send_service_change_indication(esp_gatt_if_t gatts_if, esp_bd_addr_t remote_bda);
#ifdef __cplusplus
}
#endif
#endif /* __ESP_GATTS_API_H__ */