:orphan:

.. title:: CONFIG_BT_L2CAP_TX_MTU

.. kconfig:: CONFIG_BT_L2CAP_TX_MTU

CONFIG_BT_L2CAP_TX_MTU
######################

*Maximum supported L2CAP MTU for L2CAP TX buffers*

Type: ``int``

Help
====

.. code-block:: none

    Maximum L2CAP MTU for L2CAP TX buffers.

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

\ :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.)*

Defaults
========

- 253 if \ :kconfig:`BT_BREDR <CONFIG_BT_BREDR>`
- 69 if \ :kconfig:`BT_MESH_GATT <CONFIG_BT_MESH_GATT>`
- 65 if \ :kconfig:`BT_SMP <CONFIG_BT_SMP>`
- 23

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



At ``<Zephyr Subsystem>/bluetooth/host/Kconfig.l2cap:29``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:9`` → ``<Zephyr Subsystem>/bluetooth/Kconfig:174`` → ``<Zephyr Subsystem>/bluetooth/host/Kconfig:453``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → L2CAP Options

.. code-block:: kconfig

    config BT_L2CAP_TX_MTU
    	int "Maximum supported L2CAP MTU for L2CAP TX buffers"
    	range 65 2000 if BT_SMP
    	range 23 2000
    	default 253 if BT_BREDR
    	default 69 if BT_MESH_GATT
    	default 65 if BT_SMP
    	default 23
    	depends on BT_CONN && BT_HCI_HOST && BT_HCI && BT
    	help
    	  Maximum L2CAP MTU for L2CAP TX buffers.

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