:orphan:

.. title:: MCUMGR_BUF_SIZE

.. option:: CONFIG_MCUMGR_BUF_SIZE

*Size of each mcumgr buffer*

Type: ``int``

Help
====

.. code-block:: none

    The size, in bytes, of each mcumgr buffer.  This value must satisfy
    the following relation:
    MCUMGR_BUF_SIZE >= transport-specific-MTU + transport-overhead
    In case when MCUMGR_SMP_SHELL is enabled this value should be set to
    at least SHELL_BACKEND_DUMMY_BUF_SIZE + 32.

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

\ :option:`MCUMGR <CONFIG_MCUMGR>`

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

Defaults
========

- 2048 if \ :option:`MCUMGR_SMP_UDP <CONFIG_MCUMGR_SMP_UDP>`
- 384

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



At ``<Zephyr Subsystem>/mgmt/mcumgr/Kconfig:355``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:34`` → ``<Zephyr Subsystem>/Kconfig:35`` → ``<Zephyr Subsystem>/mgmt/Kconfig:9``

Menu path: (Top) → Sub Systems and OS Services → Device Management → mcumgr Support

.. code-block:: kconfig

    config MCUMGR_BUF_SIZE
    	int "Size of each mcumgr buffer"
    	default 2048 if MCUMGR_SMP_UDP
    	default 384
    	depends on MCUMGR
    	help
    	  The size, in bytes, of each mcumgr buffer.  This value must satisfy
    	  the following relation:
    	  MCUMGR_BUF_SIZE >= transport-specific-MTU + transport-overhead
    	  In case when MCUMGR_SMP_SHELL is enabled this value should be set to
    	  at least SHELL_BACKEND_DUMMY_BUF_SIZE + 32.

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