:orphan:

.. title:: CONFIG_BT_GATT_CACHING

.. kconfig:: CONFIG_BT_GATT_CACHING

CONFIG_BT_GATT_CACHING
######################

*GATT Caching support*

Type: ``bool``

Help
====

.. code-block:: none

    This option enables support for GATT Caching. When enabled the stack
    will register Client Supported Features and Database Hash
    characteristics which can be used by clients to detect if anything has
    changed on the GATT database.

Direct dependencies
===================

\ :kconfig:`BT_GATT_SERVICE_CHANGED <CONFIG_BT_GATT_SERVICE_CHANGED>` && \ :kconfig:`BT_CONN <CONFIG_BT_CONN>` && \ :kconfig:`BT_HCI_HOST <CONFIG_BT_HCI_HOST>` && \ :kconfig:`BT_HCI <CONFIG_BT_HCI>` && \ :kconfig:`BT <CONFIG_BT>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y

Symbols selected by this symbol
===============================

- \ :kconfig:`TINYCRYPT <CONFIG_TINYCRYPT>`
- \ :kconfig:`TINYCRYPT_AES <CONFIG_TINYCRYPT_AES>`
- \ :kconfig:`TINYCRYPT_AES_CMAC <CONFIG_TINYCRYPT_AES_CMAC>`

Symbols that select this symbol
===============================

- \ :kconfig:`BT_AUDIO_UNICAST <CONFIG_BT_AUDIO_UNICAST>`

Kconfig definition
==================



At ``<Zephyr Subsystem>/bluetooth/host/Kconfig.gatt:88``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:9`` → ``<Zephyr Subsystem>/bluetooth/Kconfig:174`` → ``<Zephyr Subsystem>/bluetooth/host/Kconfig:454``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → ATT and GATT Options → GATT Service Changed support

.. code-block:: kconfig

    config BT_GATT_CACHING
    	bool "GATT Caching support"
    	default y
    	select TINYCRYPT
    	select TINYCRYPT_AES
    	select TINYCRYPT_AES_CMAC
    	depends on BT_GATT_SERVICE_CHANGED && BT_CONN && BT_HCI_HOST && BT_HCI && BT
    	help
    	  This option enables support for GATT Caching. When enabled the stack
    	  will register Client Supported Features and Database Hash
    	  characteristics which can be used by clients to detect if anything has
    	  changed on the GATT database.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*