:orphan:

.. title:: BT_GATT_CACHING

.. option:: CONFIG_BT_GATT_CACHING

*GATT Caching support*

Type: ``bool``

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.

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

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

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

Default
=======

- y

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

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

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

- \ :option:`BT_AUDIO_UNICAST <CONFIG_BT_AUDIO_UNICAST>`

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

.. highlight:: kconfig

At ``subsys/bluetooth/host/Kconfig.gatt:82``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:34`` → ``subsys/Kconfig:9`` → ``subsys/bluetooth/Kconfig:239`` → ``subsys/bluetooth/host/Kconfig:507``

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

.. parsed-literal::

    config BT_GATT_CACHING
    	bool "GATT Caching support"
    	default y
    	select \ :option:`TINYCRYPT <CONFIG_TINYCRYPT>`
    	select \ :option:`TINYCRYPT_AES <CONFIG_TINYCRYPT_AES>`
    	select \ :option:`TINYCRYPT_AES_CMAC <CONFIG_TINYCRYPT_AES_CMAC>`
    	depends on \ :option:`BT_GATT_SERVICE_CHANGED <CONFIG_BT_GATT_SERVICE_CHANGED>` && \ :option:`BT_CONN <CONFIG_BT_CONN>` && \ :option:`BT_HCI_HOST <CONFIG_BT_HCI_HOST>` && \ :option:`BT_HCI <CONFIG_BT_HCI>` && \ :option:`BT <CONFIG_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.)*