:orphan:

.. title:: CONFIG_ESP32_WIFI_CACHE_TX_BUFFER_NUM

.. kconfig:: CONFIG_ESP32_WIFI_CACHE_TX_BUFFER_NUM

CONFIG_ESP32_WIFI_CACHE_TX_BUFFER_NUM
#####################################

*Max number of WiFi cache TX buffers*

Type: ``int``

Help
====

.. code-block:: none

    Set the number of WiFi cache TX buffer number.

    For each TX packet from uplayer, such as LWIP etc, WiFi driver needs to
    allocate a static TX buffer and makes a copy of uplayer packet. If WiFi
    driver fails to allocate the static TX buffer, it caches the uplayer
    packets to a dedicated buffer queue, this option is used to configure the
    size of the cached TX queue.

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

\ :kconfig:`WIFI_ESP32 <CONFIG_WIFI_ESP32>` && \ :kconfig:`WIFI <CONFIG_WIFI>`

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

Default
=======

- 32

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



At ``<Zephyr Driver>/wifi/esp32/Kconfig.esp32:120``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:42`` → ``<Zephyr Driver>/Kconfig:78`` → ``<Zephyr Driver>/wifi/Kconfig:36``

Menu path: (Top) → Device Drivers → Wi-Fi Drivers → ESP32 SoC WiFi support

.. code-block:: kconfig

    config ESP32_WIFI_CACHE_TX_BUFFER_NUM
    	int "Max number of WiFi cache TX buffers"
    	range 16 128
    	default 32
    	depends on WIFI_ESP32 && WIFI
    	help
    	  Set the number of WiFi cache TX buffer number.
	  
    	  For each TX packet from uplayer, such as LWIP etc, WiFi driver needs to
    	  allocate a static TX buffer and makes a copy of uplayer packet. If WiFi
    	  driver fails to allocate the static TX buffer, it caches the uplayer
    	  packets to a dedicated buffer queue, this option is used to configure the
    	  size of the cached TX queue.

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