CONFIG_MCUMGR_BUF_SIZE

Size of each mcumgr buffer

Type: int

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.

Direct dependencies

MCUMGR

(Includes any dependencies from ifs and menus.)

Defaults

Kconfig definition

At <Zephyr Subsystem>/mgmt/mcumgr/Kconfig:413

Included via Kconfig:8 → Kconfig.zephyr:44 → <Zephyr Subsystem>/Kconfig:35 → <Zephyr Subsystem>/mgmt/Kconfig:9

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

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.)