:orphan:

.. title:: MCUMGR_SMP_UART_MTU

.. option:: CONFIG_MCUMGR_SMP_UART_MTU

*UART SMP MTU*

Type: ``int``

Help
====

.. code-block:: none

    Maximum size of SMP frames sent and received over UART, in bytes.
    This value must satisfy the following relation:
    MCUMGR_SMP_UART_MTU <= MCUMGR_BUF_SIZE + 2

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

\ :option:`MCUMGR_SMP_UART <CONFIG_MCUMGR_SMP_UART>` && \ :option:`MCUMGR <CONFIG_MCUMGR>`

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

Default
=======

- 256

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



At ``<Zephyr Subsystem>/mgmt/mcumgr/Kconfig:282``

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 → UART mcumgr SMP transport

.. code-block:: kconfig

    config MCUMGR_SMP_UART_MTU
    	int "UART SMP MTU"
    	default 256
    	depends on MCUMGR_SMP_UART && MCUMGR
    	help
    	  Maximum size of SMP frames sent and received over UART, in bytes.
    	  This value must satisfy the following relation:
    	  MCUMGR_SMP_UART_MTU <= MCUMGR_BUF_SIZE + 2

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