CONFIG_BT_CTLR_TX_BUFFERS

Number of Tx buffers

Type: int

Help

Set the number of Tx PDUs to be queued for transmission in the controller. In a 7.5ms connection interval and 2M PHY, maximum 19 packets can be enqueued, with 18 packets with L2CAP payload size of 1 byte can be acknowledged.

Direct dependencies

BT_CTLR && BT_HCI && BT

(Includes any dependencies from if’s and menus.)

Defaults

Kconfig definition

At subsys/bluetooth/controller/Kconfig:119

Included via Kconfig:10Kconfig.zephyr:39subsys/Kconfig:8subsys/bluetooth/Kconfig:145

Menu path: (top menu) → Bluetooth → Bluetooth support → Bluetooth Controller

config BT_CTLR_TX_BUFFERS
    int
    prompt "Number of Tx buffers" if BT_CTLR && BT_HCI && BT
    range 1 19 if BT_CTLR && BT_HCI && BT
    default 7 if BT_HCI_RAW && BT_CTLR && BT_HCI && BT
    default 3 if BT_CTLR && BT_HCI && BT
    depends on BT_CTLR && BT_HCI && BT
    help
      Set the number of Tx PDUs to be queued for transmission in the
      controller. In a 7.5ms connection interval and 2M PHY, maximum 19
      packets can be enqueued, with 18 packets with L2CAP payload size of 1
      byte can be acknowledged.

(Definitions include propagated dependencies, including from if’s and menus.)