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fix(wifi): fix max connection number issue

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muhaidong
2026-04-29 16:56:18 +08:00
parent f7a5ef7ad5
commit 47e680d2cd
7 changed files with 55 additions and 111 deletions
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2
components/esp_wifi/include/esp_wifi_types_generic.h
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@@ -529,7 +529,7 @@ typedef struct {
uint8_t channel; /**< Channel of soft-AP. Set to 0 for auto selection (min channel: typically 1 for 2.4G, 36 for 5G). Other invalid values return ESP_ERR_INVALID_ARG. */
wifi_auth_mode_t authmode; /**< Auth mode of soft-AP. Do not support AUTH_WEP, AUTH_WAPI_PSK and AUTH_OWE in soft-AP mode. When the auth mode is set to WPA2_PSK, WPA2_WPA3_PSK or WPA3_PSK, the pairwise cipher will be overwritten with WIFI_CIPHER_TYPE_CCMP by default, unless explicitly set. */
uint8_t ssid_hidden; /**< Broadcast SSID or not, default 0, broadcast the SSID */
uint8_t max_connection; /**< Max number of stations allowed to connect in */
uint8_t max_connection; /**< Max number of stations allowed to connect in. Please note that soft-AP and ESP-NOW share the same encryption hardware keys, so the max_connection parameter will be affected by CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM. */
uint16_t beacon_interval; /**< Beacon interval which should be multiples of 100. Unit: TU(time unit, 1 TU = 1024 us). Range: 100 ~ 60000. Default value: 100 */
uint8_t csa_count; /**< Channel Switch Announcement Count. Notify the station that the channel will switch after the csa_count beacon intervals. Default value: 3 */
uint8_t dtim_period; /**< Dtim period of soft-AP. Range: 1 ~ 10. Default value: 1 */

4
components/esp_wifi/include/local/esp_wifi_types_native.h
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@@ -18,10 +18,8 @@ extern "C" {
#if CONFIG_IDF_TARGET_ESP32C2
#define ESP_WIFI_MAX_CONN_NUM (4) /**< max number of stations which can connect to ESP32C2 soft-AP */
#elif CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32C6 || CONFIG_IDF_TARGET_ESP32C5 || CONFIG_IDF_TARGET_ESP32C61 || CONFIG_IDF_TARGET_ESP32S31
#define ESP_WIFI_MAX_CONN_NUM (10) /**< max number of stations which can connect to ESP32C3/ESP32C6/ESP32C5/ESP32C61/ESP32S31 soft-AP */
#else
#define ESP_WIFI_MAX_CONN_NUM (15) /**< max number of stations which can connect to ESP32/ESP32S3/ESP32S2 soft-AP */
#define ESP_WIFI_MAX_CONN_NUM (15)
#endif
/** @brief List of stations associated with the Soft-AP */

2
components/esp_wifi/lib

Submodule components/esp_wifi/lib updated: 694f70f614...baa228bd4d

2
components/esp_wifi/remote/include/injected/esp_wifi_types_generic.h
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@@ -529,7 +529,7 @@ typedef struct {
uint8_t channel; /**< Channel of soft-AP. Set to 0 for auto selection (min channel: typically 1 for 2.4G, 36 for 5G). Other invalid values return ESP_ERR_INVALID_ARG. */
wifi_auth_mode_t authmode; /**< Auth mode of soft-AP. Do not support AUTH_WEP, AUTH_WAPI_PSK and AUTH_OWE in soft-AP mode. When the auth mode is set to WPA2_PSK, WPA2_WPA3_PSK or WPA3_PSK, the pairwise cipher will be overwritten with WIFI_CIPHER_TYPE_CCMP by default, unless explicitly set. */
uint8_t ssid_hidden; /**< Broadcast SSID or not, default 0, broadcast the SSID */
uint8_t max_connection; /**< Max number of stations allowed to connect in */
uint8_t max_connection; /**< Max number of stations allowed to connect in. Please note that soft-AP and ESP-NOW share the same encryption hardware keys, so the max_connection parameter will be affected by CONFIG_WIFI_RMT_ESPNOW_MAX_ENCRYPT_NUM. */
uint16_t beacon_interval; /**< Beacon interval which should be multiples of 100. Unit: TU(time unit, 1 TU = 1024 us). Range: 100 ~ 60000. Default value: 100 */
uint8_t csa_count; /**< Channel Switch Announcement Count. Notify the station that the channel will switch after the csa_count beacon intervals. Default value: 3 */
uint8_t dtim_period; /**< Dtim period of soft-AP. Range: 1 ~ 10. Default value: 1 */

4
components/esp_wifi/remote/include/injected/esp_wifi_types_native.h
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@@ -18,10 +18,8 @@ extern "C" {
#if CONFIG_SLAVE_IDF_TARGET_ESP32C2
#define ESP_WIFI_MAX_CONN_NUM (4) /**< max number of stations which can connect to ESP32C2 soft-AP */
#elif CONFIG_SLAVE_IDF_TARGET_ESP32C3 || CONFIG_SLAVE_IDF_TARGET_ESP32C6 || CONFIG_SLAVE_IDF_TARGET_ESP32C5 || CONFIG_SLAVE_IDF_TARGET_ESP32C61 || CONFIG_SLAVE_IDF_TARGET_ESP32S31
#define ESP_WIFI_MAX_CONN_NUM (10) /**< max number of stations which can connect to ESP32C3/ESP32C6/ESP32C5/ESP32C61/ESP32S31 soft-AP */
#else
#define ESP_WIFI_MAX_CONN_NUM (15) /**< max number of stations which can connect to ESP32/ESP32S3/ESP32S2 soft-AP */
#define ESP_WIFI_MAX_CONN_NUM (15)
#endif
/** @brief List of stations associated with the Soft-AP */

76
docs/en/api-guides/wifi-driver/overview.rst
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@@ -387,9 +387,11 @@ The :ref:`wifi-event-connectionless-module-wake-interval-start` will arise at th
{IDF_TARGET_MAX_CONN_STA_NUM:default="15", esp32c2="4", esp32c3="10", esp32c6="10"}
{IDF_TARGET_MAX_CONN_STA_NUM:default="15", esp32c2="4"}
{IDF_TARGET_SUB_MAX_NUM_FROM_KEYS:default="2", esp32c3="7", esp32c6="7"}
{IDF_TARGET_SUB_MAX_NUM_FROM_KEYS:default="2", esp32c2="0"}
{IDF_TARGET_SUPPORT_ENCRYPT_NUM:default="17", esp32c2="4"}
.. _wifi-configuration:
@@ -525,56 +527,28 @@ AP Basic Configuration
API :cpp:func:`esp_wifi_set_config()` can be used to configure the AP. And the configuration will be stored in NVS. The table below describes the fields in detail.
.. only:: esp32 or esp32s2 or esp32s3 or esp32c3 or esp32c5 or esp32c6
.. list-table::
:header-rows: 1
:widths: 15 55
.. list-table::
:header-rows: 1
:widths: 15 55
* - Field
- Description
* - ssid
- SSID of AP; if the ssid[0] is 0xFF and ssid[1] is 0xFF, the AP defaults the SSID to ``ESP_aabbcc``, where “aabbcc” is the last three bytes of the AP MAC.
* - password
- Password of AP; if the auth mode is ``WIFI_AUTH_OPEN``, this field will be ignored.
* - ssid_len
- Length of SSID; if ssid_len is 0, check the SSID until there is a termination character. If ssid_len > 32, change it to 32; otherwise, set the SSID length according to ssid_len.
* - channel
- Channel of AP; if the channel is out of range, the Wi-Fi driver will return error. So, please make sure the channel is within the required range. For more details, refer to `Wi-Fi Country Code`_.
* - authmode
- Auth mode of ESP AP; currently, ESP AP does not support AUTH_WEP. If the authmode is an invalid value, AP defaults the value to ``WIFI_AUTH_OPEN``.
* - ssid_hidden
- If ssid_hidden is 1, AP does not broadcast the SSID; otherwise, it does broadcast the SSID.
* - max_connection
- The max number of stations allowed to connect in, the default value is 10. ESP Wi-Fi supports up to {IDF_TARGET_MAX_CONN_STA_NUM} (``ESP_WIFI_MAX_CONN_NUM``) Wi-Fi connections. Please note that ESP AP and ESP-NOW share the same encryption hardware keys, so the max_connection parameter will be affected by the :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`. The total number of encryption hardware keys is 17, if :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM` <= {IDF_TARGET_SUB_MAX_NUM_FROM_KEYS}, the max_connection can be set up to {IDF_TARGET_MAX_CONN_STA_NUM}, otherwise the max_connection can be set up to (17 - :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`).
* - beacon_interval
- Beacon interval; the value is 100 ~ 60000 ms, with default value being 100 ms. If the value is out of range, AP defaults it to 100 ms.
.. only:: esp32c2
.. list-table::
:header-rows: 1
:widths: 15 55
* - Field
- Description
* - ssid
- SSID of AP; if the ssid[0] is 0xFF and ssid[1] is 0xFF, the AP defaults the SSID to ``ESP_aabbcc``, where “aabbcc” is the last three bytes of the AP MAC.
* - password
- Password of AP; if the auth mode is ``WIFI_AUTH_OPEN``, this field will be ignored.
* - ssid_len
- Length of SSID; if ssid_len is 0, check the SSID until there is a termination character. If ssid_len > 32, change it to 32; otherwise, set the SSID length according to ssid_len.
* - channel
- Channel of AP; if the channel is out of range, the Wi-Fi driver defaults to channel 1. So, please make sure the channel is within the required range. For more details, refer to `Wi-Fi Country Code`_.
* - authmode
- Auth mode of ESP AP; currently, ESP AP does not support AUTH_WEP. If the authmode is an invalid value, AP defaults the value to ``WIFI_AUTH_OPEN``.
* - ssid_hidden
- If ssid_hidden is 1, AP does not broadcast the SSID; otherwise, it does broadcast the SSID.
* - max_connection
- The max number of stations allowed to connect in, the default value is 2. ESP Wi-Fi supports up to {IDF_TARGET_MAX_CONN_STA_NUM} (``ESP_WIFI_MAX_CONN_NUM``) Wi-Fi connections. Please note that ESP AP and ESP-NOW share the same encryption hardware keys, so the max_connection parameter will be affected by the :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`. The total number of encryption hardware keys is {IDF_TARGET_MAX_CONN_STA_NUM}, the max_connection can be set up to ({IDF_TARGET_MAX_CONN_STA_NUM} - :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`).
* - beacon_interval
- Beacon interval; the value is 100 ~ 60000 ms, with default value being 100 ms. If the value is out of range, AP defaults it to 100 ms.
* - Field
- Description
* - ssid
- SSID of AP; if the ssid[0] is 0xFF and ssid[1] is 0xFF, the AP defaults the SSID to ``ESP_aabbcc``, where “aabbcc” is the last three bytes of the AP MAC.
* - password
- Password of AP; if the auth mode is ``WIFI_AUTH_OPEN``, this field will be ignored.
* - ssid_len
- Length of SSID; if ssid_len is 0, check the SSID until there is a termination character. If ssid_len > 32, change it to 32; otherwise, set the SSID length according to ssid_len.
* - channel
- Channel of AP; set to 0 for auto selection (min channel: typically 1 for 2.4G, 36 for 5G). Other invalid values return ``ESP_ERR_INVALID_ARG``. So, please make sure the channel is within the required range. For more details, refer to `Wi-Fi Country Code`_.
* - authmode
- Auth mode of ESP AP; currently, ESP AP does not support AUTH_WEP. If the authmode is an invalid value, AP defaults the value to ``WIFI_AUTH_OPEN``.
* - ssid_hidden
- If ssid_hidden is 1, AP does not broadcast the SSID; otherwise, it does broadcast the SSID.
* - max_connection
- The max number of stations allowed to connect in. {IDF_TARGET_NAME} supports up to {IDF_TARGET_MAX_CONN_STA_NUM} (``ESP_WIFI_MAX_CONN_NUM``) Wi-Fi connections. Please note that soft-AP and ESP-NOW share the same encryption hardware keys, so the max_connection parameter will be affected by the :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`. The total number of encryption hardware keys is {IDF_TARGET_SUPPORT_ENCRYPT_NUM}, if :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM` <= {IDF_TARGET_SUB_MAX_NUM_FROM_KEYS}, the max_connection can be set up to {IDF_TARGET_MAX_CONN_STA_NUM}, otherwise the max_connection can be set up to ({IDF_TARGET_SUPPORT_ENCRYPT_NUM} - :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`).
* - beacon_interval
- Beacon interval; the value is 100 ~ 60000 ms, with default value being 100 ms. If the value is out of range, AP defaults it to 100 ms.
Wi-Fi Protocol Mode

76
docs/zh_CN/api-guides/wifi-driver/overview.rst
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@@ -387,9 +387,11 @@ WIFI_EVENT_CONNECTIONLESS_MODULE_WAKE_INTERVAL_START
{IDF_TARGET_MAX_CONN_STA_NUM:default="15", esp32c2="4", esp32c3="10", esp32c6="10"}
{IDF_TARGET_MAX_CONN_STA_NUM:default="15", esp32c2="4"}
{IDF_TARGET_SUB_MAX_NUM_FROM_KEYS:default="2", esp32c3="7", esp32c6="7"}
{IDF_TARGET_SUB_MAX_NUM_FROM_KEYS:default="2", esp32c2="0"}
{IDF_TARGET_SUPPORT_ENCRYPT_NUM:default="17", esp32c2="4"}
.. _wifi-configuration:
@@ -525,56 +527,28 @@ AP 基本配置
API :cpp:func:`esp_wifi_set_config()` 可用于配置 AP。配置的参数信息会保存到 NVS 中。下表详细介绍了各个字段。
.. only:: esp32 or esp32s2 or esp32s3 or esp32c3 or esp32c5 or esp32c6
.. list-table::
:header-rows: 1
:widths: 15 55
.. list-table::
:header-rows: 1
:widths: 15 55
* - 字段
- 描述
* - ssid
- 指 AP 的 SSID。如果 ssid[0] 和 ssid[1] 均为 0xFF，AP 默认 SSID 为 ``ESP_aabbcc``，”aabbcc” 是 AP MAC 的最后三个字节。
* - password
- AP 的密码。如果身份验证模式为 ``WIFI_AUTH_OPEN``，此字段将被忽略。
* - ssid_len
- SSID 的长度。如果 ssid_len 为 0，则检查 SSID 直至出现终止字符。如果 ssid_len 大于 32，请更改为 32，或者根据 ssid_len 设置 SSID 长度。
* - channel
- AP 的信道。如果信道超出范围，Wi-Fi 驱动程序将返回 error。所以，请确保信道在要求的范围内。有关详细信息，请参阅 `Wi-Fi 国家/地区代码`_。
* - authmode
- ESP AP 的身份验证模式。目前，ESP AP 不支持 AUTH_WEP。如果 authmode 是一个无效值，AP 默认该值为 ``WIFI_AUTH_OPEN``。
* - ssid_hidden
- 如果 ssid_hidden 为 1，AP 不广播 SSID。若为其他值，则广播。
* - max_connection
- 允许连接 station 的最大数目，默认值是 10。ESP Wi-Fi 支持 {IDF_TARGET_MAX_CONN_STA_NUM} (``ESP_WIFI_MAX_CONN_NUM``) 个 Wi-Fi 连接。请注意， ESP AP 和 ESP-NOW 共享同一块加密硬件 keys，因此 max_connection 参数将受到 :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM` 的影响。加密硬件 keys 的总数是 17，如果 :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM` 小于等于 {IDF_TARGET_SUB_MAX_NUM_FROM_KEYS}，那么 max_connection 最大可以设置为 {IDF_TARGET_MAX_CONN_STA_NUM}，否则 max_connection 最大可以设置为 (17 - :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`)。
* - beacon_interval
- beacon 间隔。值为 100 ~ 60000 ms，默认值为 100 ms。如果该值不在上述范围，AP 默认取 100 ms。
.. only:: esp32c2
.. list-table::
:header-rows: 1
:widths: 15 55
* - 字段
- 描述
* - ssid
- 指 AP 的 SSID。如果 ssid[0] 和 ssid[1] 均为 0xFF，AP 默认 SSID 为 ``ESP_aabbcc``，”aabbcc” 是 AP MAC 的最后三个字节。
* - password
- AP 的密码。如果身份验证模式为 ``WIFI_AUTH_OPEN``，此字段将被忽略。
* - ssid_len
- SSID 的长度。如果 ssid_len 为 0，则检查 SSID 直至出现终止字符。如果 ssid_len 大于 32，请更改为 32，或者根据 ssid_len 设置 SSID 长度。
* - channel
- AP 的信道。如果信道超出范围，Wi-Fi 驱动程序将默认为信道 1。所以，请确保信道在要求的范围内。有关详细信息，请参阅 `Wi-Fi 国家/地区代码`_。
* - authmode
- ESP AP 的身份验证模式。目前，ESP AP 不支持 AUTH_WEP。如果 authmode 是一个无效值，AP 默认该值为 ``WIFI_AUTH_OPEN``。
* - ssid_hidden
- 如果 ssid_hidden 为 1，AP 不广播 SSID。若为其他值，则广播。
* - max_connection
- 允许连接 station 的最大数目，默认值是 2。ESP Wi-Fi 支持 {IDF_TARGET_MAX_CONN_STA_NUM} (``ESP_WIFI_MAX_CONN_NUM``) 个 Wi-Fi 连接。请注意， ESP AP 和 ESP-NOW 共享同一块加密硬件 keys，因此 max_connection 参数将受到 :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM` 的影响。加密硬件 keys 的总数是 {IDF_TARGET_MAX_CONN_STA_NUM}， max_connection 最大可以设置为 ({IDF_TARGET_MAX_CONN_STA_NUM} - :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`)。
* - beacon_interval
- beacon 间隔。值为 100 ~ 60000 ms，默认值为 100 ms。如果该值不在上述范围，AP 默认取 100 ms。
* - 字段
- 描述
* - ssid
- 指 AP 的 SSID。如果 ssid[0] 和 ssid[1] 均为 0xFF，AP 默认 SSID 为 ``ESP_aabbcc``，”aabbcc” 是 AP MAC 的最后三个字节。
* - password
- AP 的密码。如果身份验证模式为 ``WIFI_AUTH_OPEN``，此字段将被忽略。
* - ssid_len
- SSID 的长度。如果 ssid_len 为 0，则检查 SSID 直至出现终止字符。如果 ssid_len 大于 32，请更改为 32，或者根据 ssid_len 设置 SSID 长度。
* - channel
- AP 的信道。设为 0 表示自动选择（最小信道：2.4 GHz 通常为 1，5 GHz 通常为 36）。其它非法值将返回 ``ESP_ERR_INVALID_ARG``。请确保信道在允许范围内。更多说明请参阅 `Wi-Fi 国家/地区代码`_。
* - authmode
- ESP AP 的身份验证模式。目前，ESP AP 不支持 AUTH_WEP。如果 authmode 是一个无效值，AP 默认该值为 ``WIFI_AUTH_OPEN``。
* - ssid_hidden
- 如果 ssid_hidden 为 1，AP 不广播 SSID。若为其他值，则广播。
* - max_connection
- 允许接入的 station 最大数量。{IDF_TARGET_NAME} 最多支持 {IDF_TARGET_MAX_CONN_STA_NUM}（``ESP_WIFI_MAX_CONN_NUM``） 个 Wi-Fi 连接。请注意，soft-AP 与 ESP-NOW 共享同一套加密硬件 keys，因此 max_connection 会受到 :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM` 的影响。加密硬件 keys 总数为 {IDF_TARGET_SUPPORT_ENCRYPT_NUM}：若 :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM` <= {IDF_TARGET_SUB_MAX_NUM_FROM_KEYS}，则 max_connection 最大可设为 {IDF_TARGET_MAX_CONN_STA_NUM}；否则最大可设为 ({IDF_TARGET_SUPPORT_ENCRYPT_NUM} - :ref:`CONFIG_ESP_WIFI_ESPNOW_MAX_ENCRYPT_NUM`)。
* - beacon_interval
- beacon 间隔。值为 100 ~ 60000 ms，默认值为 100 ms。如果该值不在上述范围，AP 默认取 100 ms。
Wi-Fi 协议模式