CONFIG_BT_L2CAP_TX_MTU

Maximum supported L2CAP MTU for L2CAP TX buffers

Type: int

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Maximum L2CAP MTU for L2CAP TX buffers.

Direct dependencies

BT_CONN && BT_HCI_HOST && BT_HCI && BT

(Includes any dependencies from ifs and menus.)

Defaults

• 253 if BT_BREDR

• 69 if BT_MESH_GATT

• 65 if 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

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.)