:orphan:

.. title:: BT_EATT_RX_MTU

.. option:: CONFIG_BT_EATT_RX_MTU

*Maximum supported Enhanced ATT MTU for incoming data*

Type: ``int``

Help
====

Maximum size incoming PDUs on EATT bearers, value shall include L2CAP
headers and SDU length, maximum is limited to 512 bytes payload, which
is the maximum size for a GATT attribute, plus 1 byte for ATT opcode.
This option influences the stack buffer size and by that may also
limit the outgoing MTU.

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

\ :option:`BT_EATT <CONFIG_BT_EATT>` && \ :option:`BT_EATT <CONFIG_BT_EATT>` && \ :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
=======

- 70

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

.. highlight:: kconfig

At ``subsys/bluetooth/host/Kconfig.gatt:45``

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 → Enhanced ATT Bearers support [EXPERIMENTAL]

.. parsed-literal::

    config BT_EATT_RX_MTU
    	int "Maximum supported Enhanced ATT MTU for incoming data"
    	range 70 519
    	default 70
    	depends on \ :option:`BT_EATT <CONFIG_BT_EATT>` && \ :option:`BT_EATT <CONFIG_BT_EATT>` && \ :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
    	  Maximum size incoming PDUs on EATT bearers, value shall include L2CAP
    	  headers and SDU length, maximum is limited to 512 bytes payload, which
    	  is the maximum size for a GATT attribute, plus 1 byte for ATT opcode.
    	  This option influences the stack buffer size and by that may also
    	  limit the outgoing MTU.

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