:orphan:

.. title:: CONFIG_BT_MESH_TX_SEG_MAX

.. kconfig:: CONFIG_BT_MESH_TX_SEG_MAX

CONFIG_BT_MESH_TX_SEG_MAX
#########################

*Maximum number of segments in outgoing messages*

Type: ``int``

Help
====

.. code-block:: none

    Maximum number of segments supported for outgoing messages.
    This value should typically be fine-tuned based on what
    models the local node supports, i.e. what's the largest
    message payload that the node needs to be able to send.
    This value affects memory consumption, which is why the
    default is lower than the maximum that the specification
    would allow (32 segments).

    The maximum outgoing SDU size is 12 times this number (out of
    which 4 or 8 bytes is used for the Transport Layer MIC). For
    example, 5 segments means the maximum SDU size is 60 bytes,
    which leaves 56 bytes for application layer data using a
    4-byte MIC and 52 bytes using an 8-byte MIC.

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

\ :kconfig:`BT_MESH <CONFIG_BT_MESH>` && \ :kconfig:`BT <CONFIG_BT>`

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

Default
=======

- 3

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



At ``<Zephyr Subsystem>/bluetooth/mesh/Kconfig:396``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:9`` → ``<Zephyr Subsystem>/bluetooth/Kconfig:193``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → Bluetooth mesh support

.. code-block:: kconfig

    config BT_MESH_TX_SEG_MAX
    	int "Maximum number of segments in outgoing messages"
    	range 2 32
    	default 3
    	depends on BT_MESH && BT
    	help
    	  Maximum number of segments supported for outgoing messages.
    	  This value should typically be fine-tuned based on what
    	  models the local node supports, i.e. what's the largest
    	  message payload that the node needs to be able to send.
    	  This value affects memory consumption, which is why the
    	  default is lower than the maximum that the specification
    	  would allow (32 segments).
	  
    	  The maximum outgoing SDU size is 12 times this number (out of
    	  which 4 or 8 bytes is used for the Transport Layer MIC). For
    	  example, 5 segments means the maximum SDU size is 60 bytes,
    	  which leaves 56 bytes for application layer data using a
    	  4-byte MIC and 52 bytes using an 8-byte MIC.

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