CONFIG_BT_BUF_ACL_TX_COUNT

Number of outgoing ACL data buffers

Type: int

Help

Number of outgoing ACL data buffers sent from the Host to the
Controller. This determines the maximum amount of data packets the
Host can have queued in the Controller before waiting for the
to notify the Host that more packets can be queued with the Number of
Completed Packets event.
The buffers are shared between all of the connections and the Host
determines how to divide the buffers between the connections.
The Controller will return this value in the HCI LE Read Buffer Size
command response.

Direct dependencies

BT_HCI && BT

(Includes any dependencies from ifs and menus.)

Defaults

• 7 if BT_HCI_RAW

• 3

Kconfig definition

At <Zephyr>/subsys/bluetooth/common/Kconfig:32

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:42 → <Zephyr>/subsys/Kconfig:9 → <Zephyr>/subsys/bluetooth/Kconfig:322

Menu path: (Top) → Sub Systems and OS Services → Bluetooth

config BT_BUF_ACL_TX_COUNT
    int "Number of outgoing ACL data buffers"
    range 1 255
    default 7 if BT_HCI_RAW
    default 3
    depends on BT_HCI && BT
    help
      Number of outgoing ACL data buffers sent from the Host to the
      Controller. This determines the maximum amount of data packets the
      Host can have queued in the Controller before waiting for the
      to notify the Host that more packets can be queued with the Number of
      Completed Packets event.
      The buffers are shared between all of the connections and the Host
      determines how to divide the buffers between the connections.
      The Controller will return this value in the HCI LE Read Buffer Size
      command response.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)