Wi-Fi

[中文]

Introduction

The Wi-Fi libraries provide support for configuring and monitoring the ESP32-S2 Wi-Fi networking functionality. This includes configuration for:

• Station mode (aka STA mode or Wi-Fi client mode). ESP32-S2 connects to an access point.

• AP mode (aka Soft-AP mode or Access Point mode). Stations connect to the ESP32-S2.

• Station/AP-coexistence mode (ESP32-S2 is concurrently an access point and a station connected to another access point).

• Various security modes for the above (WPA, WPA2, WPA3, etc.)

• Scanning for access points (active & passive scanning).

• Promiscuous mode for monitoring of IEEE802.11 Wi-Fi packets.

Application Examples

The wifi directory of ESP-IDF examples contains the following applications:

• Code examples for Wi-Fi.

• A simple esp-idf-template application to demonstrate a minimal IDF project structure.

API Reference

Header File

• components/esp_wifi/include/esp_wifi.h

Functions

esp_err_t esp_wifi_init(const wifi_init_config_t *config)

Initialize WiFi Allocate resource for WiFi driver, such as WiFi control structure, RX/TX buffer, WiFi NVS structure etc. This WiFi also starts WiFi task.

Attention

1. This API must be called before all other WiFi API can be called

Attention

2. Always use WIFI_INIT_CONFIG_DEFAULT macro to initialize the configuration to default values, this can guarantee all the fields get correct value when more fields are added into wifi_init_config_t in future release. If you want to set your own initial values, overwrite the default values which are set by WIFI_INIT_CONFIG_DEFAULT. Please be notified that the field ‘magic’ of wifi_init_config_t should always be WIFI_INIT_CONFIG_MAGIC!

Parameters

config – pointer to WiFi initialized configuration structure; can point to a temporary variable.

Returns

• ESP_OK: succeed

• ESP_ERR_NO_MEM: out of memory

• others: refer to error code esp_err.h

esp_err_t esp_wifi_deinit(void)

Deinit WiFi Free all resource allocated in esp_wifi_init and stop WiFi task.

Attention

1. This API should be called if you want to remove WiFi driver from the system

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_set_mode(wifi_mode_t mode)

Set the WiFi operating mode.

       Set the WiFi operating mode as station, soft-AP or station+soft-AP,
       The default mode is station mode.

Parameters

mode – WiFi operating mode

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

• others: refer to error code in esp_err.h

esp_err_t esp_wifi_get_mode(wifi_mode_t *mode)

Get current operating mode of WiFi.

Parameters

mode – [out] store current WiFi mode

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_start(void)

Start WiFi according to current configuration If mode is WIFI_MODE_STA, it create station control block and start station If mode is WIFI_MODE_AP, it create soft-AP control block and start soft-AP If mode is WIFI_MODE_APSTA, it create soft-AP and station control block and start soft-AP and station.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_NO_MEM: out of memory

• ESP_ERR_WIFI_CONN: WiFi internal error, station or soft-AP control block wrong

• ESP_FAIL: other WiFi internal errors

esp_err_t esp_wifi_stop(void)

Stop WiFi If mode is WIFI_MODE_STA, it stop station and free station control block If mode is WIFI_MODE_AP, it stop soft-AP and free soft-AP control block If mode is WIFI_MODE_APSTA, it stop station/soft-AP and free station/soft-AP control block.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_restore(void)

Restore WiFi stack persistent settings to default values.

This function will reset settings made using the following APIs:

• esp_wifi_set_bandwidth,

• esp_wifi_set_protocol,

• esp_wifi_set_config related

• esp_wifi_set_mode

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_connect(void)

Connect the ESP32 WiFi station to the AP.

Attention

1. This API only impact WIFI_MODE_STA or WIFI_MODE_APSTA mode

Attention

2. If the ESP32 is connected to an AP, call esp_wifi_disconnect to disconnect.

Attention

3. The scanning triggered by esp_wifi_scan_start() will not be effective until connection between ESP32 and the AP is established. If ESP32 is scanning and connecting at the same time, ESP32 will abort scanning and return a warning message and error number ESP_ERR_WIFI_STATE.

Attention

4. This API attempts to connect to an Access Point (AP) only once. To enable reconnection in case of a connection failure, please use the ‘failure_retry_cnt’ feature in the ‘wifi_sta_config_t’. Users are suggested to implement reconnection logic in their application for scenarios where the specified AP does not exist, or reconnection is desired after the device has received a disconnect event.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_WIFI_MODE: WiFi mode error

• ESP_ERR_WIFI_CONN: WiFi internal error, station or soft-AP control block wrong

• ESP_ERR_WIFI_SSID: SSID of AP which station connects is invalid

esp_err_t esp_wifi_disconnect(void)

Disconnect the ESP32 WiFi station from the AP.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi was not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi was not started by esp_wifi_start

• ESP_FAIL: other WiFi internal errors

esp_err_t esp_wifi_clear_fast_connect(void)

Currently this API is just an stub API.

Returns

• ESP_OK: succeed

• others: fail

esp_err_t esp_wifi_deauth_sta(uint16_t aid)

deauthenticate all stations or associated id equals to aid

Parameters

aid – when aid is 0, deauthenticate all stations, otherwise deauthenticate station whose associated id is aid

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi was not started by esp_wifi_start

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_WIFI_MODE: WiFi mode is wrong

esp_err_t esp_wifi_scan_start(const wifi_scan_config_t *config, bool block)

Scan all available APs.

Attention

If this API is called, the found APs are stored in WiFi driver dynamic allocated memory. And then can be freed in esp_wifi_scan_get_ap_records(), esp_wifi_scan_get_ap_record() or esp_wifi_clear_ap_list(), so call any one to free the memory once the scan is done.

Attention

The values of maximum active scan time and passive scan time per channel are limited to 1500 milliseconds. Values above 1500ms may cause station to disconnect from AP and are not recommended.

Parameters

• config – configuration settings for scanning, if set to NULL default settings will be used of which default values are show_hidden:false, scan_type:active, scan_time.active.min:0, scan_time.active.max:120 miliseconds, scan_time.passive:360 miliseconds

• block – if block is true, this API will block the caller until the scan is done, otherwise it will return immediately

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi was not started by esp_wifi_start

• ESP_ERR_WIFI_TIMEOUT: blocking scan is timeout

• ESP_ERR_WIFI_STATE: wifi still connecting when invoke esp_wifi_scan_start

• others: refer to error code in esp_err.h

esp_err_t esp_wifi_scan_stop(void)

Stop the scan in process.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

esp_err_t esp_wifi_scan_get_ap_num(uint16_t *number)

Get number of APs found in last scan.

Attention

This API can only be called when the scan is completed, otherwise it may get wrong value.

Parameters

number – [out] store number of APs found in last scan

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_scan_get_ap_records(uint16_t *number, wifi_ap_record_t *ap_records)

Get AP list found in last scan.

Attention

This API will free all memory occupied by scanned AP list.

Parameters

• number – [inout] As input param, it stores max AP number ap_records can hold. As output param, it receives the actual AP number this API returns.

• ap_records – wifi_ap_record_t array to hold the found APs

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_NO_MEM: out of memory

esp_err_t esp_wifi_scan_get_ap_record(wifi_ap_record_t *ap_record)

Get one AP record from the scanned AP list.

Attention

Different from esp_wifi_scan_get_ap_records(), this API only gets one AP record from the scanned AP list each time. This API will free the memory of one AP record, if the user doesn’t get all records in the scannned AP list, then needs to call esp_wifi_clear_ap_list() to free the remaining memory.

Parameters

ap_record – [out] pointer to one AP record

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_FAIL: scan APs is NULL, means all AP records fetched or no AP found

esp_err_t esp_wifi_clear_ap_list(void)

Clear AP list found in last scan.

Attention

This API will free all memory occupied by scanned AP list. When the obtained AP list fails, AP records must be cleared,otherwise it may cause memory leakage.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_WIFI_MODE: WiFi mode is wrong

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_sta_get_ap_info(wifi_ap_record_t *ap_info)

Get information of AP which the ESP32 station is associated with.

Attention

When the obtained country information is empty, it means that the AP does not carry country information

Parameters

ap_info – the wifi_ap_record_t to hold AP information sta can get the connected ap’s phy mode info through the struct member phy_11b，phy_11g，phy_11n，phy_lr in the wifi_ap_record_t struct. For example, phy_11b = 1 imply that ap support 802.11b mode

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_CONN: The station interface don’t initialized

• ESP_ERR_WIFI_NOT_CONNECT: The station is in disconnect status

esp_err_t esp_wifi_set_ps(wifi_ps_type_t type)

Set current WiFi power save type.

Attention

Default power save type is WIFI_PS_MIN_MODEM.

Parameters

type – power save type

Returns

ESP_OK: succeed

esp_err_t esp_wifi_get_ps(wifi_ps_type_t *type)

Get current WiFi power save type.

Attention

Default power save type is WIFI_PS_MIN_MODEM.

Parameters

type – [out] store current power save type

Returns

ESP_OK: succeed

esp_err_t esp_wifi_set_protocol(wifi_interface_t ifx, uint8_t protocol_bitmap)

Set protocol type of specified interface The default protocol is (WIFI_PROTOCOL_11B|WIFI_PROTOCOL_11G|WIFI_PROTOCOL_11N)

Attention

Support 802.11b or 802.11bg or 802.11bgn or LR mode

Parameters

• ifx – interfaces

• protocol_bitmap – WiFi protocol bitmap

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_IF: invalid interface

• others: refer to error codes in esp_err.h

esp_err_t esp_wifi_get_protocol(wifi_interface_t ifx, uint8_t *protocol_bitmap)

Get the current protocol bitmap of the specified interface.

Parameters

• ifx – interface

• protocol_bitmap – [out] store current WiFi protocol bitmap of interface ifx

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_IF: invalid interface

• ESP_ERR_INVALID_ARG: invalid argument

• others: refer to error codes in esp_err.h

esp_err_t esp_wifi_set_bandwidth(wifi_interface_t ifx, wifi_bandwidth_t bw)

Set the bandwidth of ESP32 specified interface.

Attention

1. API return false if try to configure an interface that is not enabled

Attention

2. WIFI_BW_HT40 is supported only when the interface support 11N

Parameters

• ifx – interface to be configured

• bw – bandwidth

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_IF: invalid interface

• ESP_ERR_INVALID_ARG: invalid argument

• others: refer to error codes in esp_err.h

esp_err_t esp_wifi_get_bandwidth(wifi_interface_t ifx, wifi_bandwidth_t *bw)

Get the bandwidth of ESP32 specified interface.

Attention

1. API return false if try to get a interface that is not enable

Parameters

• ifx – interface to be configured

• bw – [out] store bandwidth of interface ifx

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_IF: invalid interface

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_set_channel(uint8_t primary, wifi_second_chan_t second)

Set primary/secondary channel of ESP32.

Attention

1. This API should be called after esp_wifi_start() and before esp_wifi_stop()

Attention

2. When ESP32 is in STA mode, this API should not be called when STA is scanning or connecting to an external AP

Attention

3. When ESP32 is in softAP mode, this API should not be called when softAP has connected to external STAs

Attention

4. When ESP32 is in STA+softAP mode, this API should not be called when in the scenarios described above

Attention

5. The channel info set by this API will not be stored in NVS. So If you want to remeber the channel used before wifi stop, you need to call this API again after wifi start, or you can call esp_wifi_set_config() to store the channel info in NVS.

Parameters

• primary – for HT20, primary is the channel number, for HT40, primary is the primary channel

• second – for HT20, second is ignored, for HT40, second is the second channel

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_IF: invalid interface

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

esp_err_t esp_wifi_get_channel(uint8_t *primary, wifi_second_chan_t *second)

Get the primary/secondary channel of ESP32.

Attention

1. API return false if try to get a interface that is not enable

Parameters

• primary – store current primary channel

• second – [out] store current second channel

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_set_country(const wifi_country_t *country)

configure country info

Attention

1. It is discouraged to call this API since this doesn’t validate the per-country rules, it’s up to the user to fill in all fields according to local regulations. Please use esp_wifi_set_country_code instead.

Attention

2. The default country is “01” (world safe mode) {.cc=”01”, .schan=1, .nchan=11, .policy=WIFI_COUNTRY_POLICY_AUTO}.

Attention

3. The third octet of country code string is one of the following: ‘ ‘, ‘O’, ‘I’, ‘X’, otherwise it is considered as ‘ ‘.

Attention

4. When the country policy is WIFI_COUNTRY_POLICY_AUTO, the country info of the AP to which the station is connected is used. E.g. if the configured country info is {.cc=”US”, .schan=1, .nchan=11} and the country info of the AP to which the station is connected is {.cc=”JP”, .schan=1, .nchan=14} then the country info that will be used is {.cc=”JP”, .schan=1, .nchan=14}. If the station disconnected from the AP the country info is set back to the country info of the station automatically, {.cc=”US”, .schan=1, .nchan=11} in the example.

Attention

5. When the country policy is WIFI_COUNTRY_POLICY_MANUAL, then the configured country info is used always.

Attention

6. When the country info is changed because of configuration or because the station connects to a different external AP, the country IE in probe response/beacon of the soft-AP is also changed.

Attention

7. The country configuration is stored into flash.

Attention

8. When this API is called, the PHY init data will switch to the PHY init data type corresponding to the country info.

Parameters

country – the configured country info

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_get_country(wifi_country_t *country)

get the current country info

Parameters

country – country info

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_set_mac(wifi_interface_t ifx, const uint8_t mac[6])

Set MAC address of the ESP32 WiFi station or the soft-AP interface.

Attention

1. This API can only be called when the interface is disabled

Attention

2. ESP32 soft-AP and station have different MAC addresses, do not set them to be the same.

Attention

3. The bit 0 of the first byte of ESP32 MAC address can not be 1. For example, the MAC address can set to be “1a:XX:XX:XX:XX:XX”, but can not be “15:XX:XX:XX:XX:XX”.

Parameters

• ifx – interface

• mac – the MAC address

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_WIFI_IF: invalid interface

• ESP_ERR_WIFI_MAC: invalid mac address

• ESP_ERR_WIFI_MODE: WiFi mode is wrong

• others: refer to error codes in esp_err.h

esp_err_t esp_wifi_get_mac(wifi_interface_t ifx, uint8_t mac[6])

Get mac of specified interface.

Parameters

• ifx – interface

• mac – [out] store mac of the interface ifx

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_WIFI_IF: invalid interface

esp_err_t esp_wifi_set_promiscuous_rx_cb(wifi_promiscuous_cb_t cb)

Register the RX callback function in the promiscuous mode.

Each time a packet is received, the registered callback function will be called.

Parameters

cb – callback

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_set_promiscuous(bool en)

Enable the promiscuous mode.

Parameters

en – false - disable, true - enable

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_get_promiscuous(bool *en)

Get the promiscuous mode.

Parameters

en – [out] store the current status of promiscuous mode

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_set_promiscuous_filter(const wifi_promiscuous_filter_t *filter)

Enable the promiscuous mode packet type filter.

Note

The default filter is to filter all packets except WIFI_PKT_MISC

Parameters

filter – the packet type filtered in promiscuous mode.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_get_promiscuous_filter(wifi_promiscuous_filter_t *filter)

Get the promiscuous filter.

Parameters

filter – [out] store the current status of promiscuous filter

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_set_promiscuous_ctrl_filter(const wifi_promiscuous_filter_t *filter)

Enable subtype filter of the control packet in promiscuous mode.

Note

The default filter is to filter none control packet.

Parameters

filter – the subtype of the control packet filtered in promiscuous mode.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_get_promiscuous_ctrl_filter(wifi_promiscuous_filter_t *filter)

Get the subtype filter of the control packet in promiscuous mode.

Parameters

filter – [out] store the current status of subtype filter of the control packet in promiscuous mode

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_set_config(wifi_interface_t interface, wifi_config_t *conf)

Set the configuration of the ESP32 STA or AP.

Attention

1. This API can be called only when specified interface is enabled, otherwise, API fail

Attention

2. For station configuration, bssid_set needs to be 0; and it needs to be 1 only when users need to check the MAC address of the AP.

Attention

3. ESP32 is limited to only one channel, so when in the soft-AP+station mode, the soft-AP will adjust its channel automatically to be the same as the channel of the ESP32 station.

Attention

4. The configuration will be stored in NVS

Parameters

• interface – interface

• conf – station or soft-AP configuration

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_WIFI_IF: invalid interface

• ESP_ERR_WIFI_MODE: invalid mode

• ESP_ERR_WIFI_PASSWORD: invalid password

• ESP_ERR_WIFI_NVS: WiFi internal NVS error

• others: refer to the error code in esp_err.h

esp_err_t esp_wifi_get_config(wifi_interface_t interface, wifi_config_t *conf)

Get configuration of specified interface.

Parameters

• interface – interface

• conf – [out] station or soft-AP configuration

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_WIFI_IF: invalid interface

esp_err_t esp_wifi_ap_get_sta_list(wifi_sta_list_t *sta)

Get STAs associated with soft-AP.

Attention

SSC only API

Parameters

sta – [out] station list ap can get the connected sta’s phy mode info through the struct member phy_11b，phy_11g，phy_11n，phy_lr in the wifi_sta_info_t struct. For example, phy_11b = 1 imply that sta support 802.11b mode

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_WIFI_MODE: WiFi mode is wrong

• ESP_ERR_WIFI_CONN: WiFi internal error, the station/soft-AP control block is invalid

esp_err_t esp_wifi_ap_get_sta_aid(const uint8_t mac[6], uint16_t *aid)

Get AID of STA connected with soft-AP.

Parameters

• mac – STA’s mac address

• aid – [out] Store the AID corresponding to STA mac

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_ERR_NOT_FOUND: Requested resource not found

• ESP_ERR_WIFI_MODE: WiFi mode is wrong

• ESP_ERR_WIFI_CONN: WiFi internal error, the station/soft-AP control block is invalid

esp_err_t esp_wifi_set_storage(wifi_storage_t storage)

Set the WiFi API configuration storage type.

Attention

1. The default value is WIFI_STORAGE_FLASH

Parameters

storage – : storage type

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_set_vendor_ie(bool enable, wifi_vendor_ie_type_t type, wifi_vendor_ie_id_t idx, const void *vnd_ie)

Set 802.11 Vendor-Specific Information Element.

Parameters

• enable – If true, specified IE is enabled. If false, specified IE is removed.

• type – Information Element type. Determines the frame type to associate with the IE.

• idx – Index to set or clear. Each IE type can be associated with up to two elements (indices 0 & 1).

• vnd_ie – Pointer to vendor specific element data. First 6 bytes should be a header with fields matching vendor_ie_data_t. If enable is false, this argument is ignored and can be NULL. Data does not need to remain valid after the function returns.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init()

• ESP_ERR_INVALID_ARG: Invalid argument, including if first byte of vnd_ie is not WIFI_VENDOR_IE_ELEMENT_ID (0xDD) or second byte is an invalid length.

• ESP_ERR_NO_MEM: Out of memory

esp_err_t esp_wifi_set_vendor_ie_cb(esp_vendor_ie_cb_t cb, void *ctx)

Register Vendor-Specific Information Element monitoring callback.

Parameters

• cb – Callback function

• ctx – Context argument, passed to callback function.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_set_max_tx_power(int8_t power)

Set maximum transmitting power after WiFi start.

Attention

1. Maximum power before wifi startup is limited by PHY init data bin.

Attention

2. The value set by this API will be mapped to the max_tx_power of the structure wifi_country_t variable.

Attention

3. Mapping Table {Power, max_tx_power} = {{8, 2}, {20, 5}, {28, 7}, {34, 8}, {44, 11}, {52, 13}, {56, 14}, {60, 15}, {66, 16}, {72, 18}, {80, 20}}.

Attention

4. Param power unit is 0.25dBm, range is [8, 84] corresponding to 2dBm - 20dBm.

Attention

5. Relationship between set value and actual value. As follows: {set value range, actual value} = {{[8, 19],8}, {[20, 27],20}, {[28, 33],28}, {[34, 43],34}, {[44, 51],44}, {[52, 55],52}, {[56, 59],56}, {[60, 65],60}, {[66, 71],66}, {[72, 79],72}, {[80, 84],80}}.

Parameters

power – Maximum WiFi transmitting power.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_INVALID_ARG: invalid argument, e.g. parameter is out of range

esp_err_t esp_wifi_get_max_tx_power(int8_t *power)

Get maximum transmiting power after WiFi start.

Parameters

power – Maximum WiFi transmitting power, unit is 0.25dBm.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_set_event_mask(uint32_t mask)

Set mask to enable or disable some WiFi events.

Attention

1. Mask can be created by logical OR of various WIFI_EVENT_MASK_ constants. Events which have corresponding bit set in the mask will not be delivered to the system event handler.

Attention

2. Default WiFi event mask is WIFI_EVENT_MASK_AP_PROBEREQRECVED.

Attention

3. There may be lots of stations sending probe request data around. Don’t unmask this event unless you need to receive probe request data.

Parameters

mask – WiFi event mask.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_get_event_mask(uint32_t *mask)

Get mask of WiFi events.

Parameters

mask – WiFi event mask.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_80211_tx(wifi_interface_t ifx, const void *buffer, int len, bool en_sys_seq)

Send raw ieee80211 data.

Attention

Currently only support for sending beacon/probe request/probe response/action and non-QoS data frame

Parameters

• ifx – interface if the Wi-Fi mode is Station, the ifx should be WIFI_IF_STA. If the Wi-Fi mode is SoftAP, the ifx should be WIFI_IF_AP. If the Wi-Fi mode is Station+SoftAP, the ifx should be WIFI_IF_STA or WIFI_IF_AP. If the ifx is wrong, the API returns ESP_ERR_WIFI_IF.

• buffer – raw ieee80211 buffer

• len – the length of raw buffer, the len must be <= 1500 Bytes and >= 24 Bytes

• en_sys_seq – indicate whether use the internal sequence number. If en_sys_seq is false, the sequence in raw buffer is unchanged, otherwise it will be overwritten by WiFi driver with the system sequence number. Generally, if esp_wifi_80211_tx is called before the Wi-Fi connection has been set up, both en_sys_seq==true and en_sys_seq==false are fine. However, if the API is called after the Wi-Fi connection has been set up, en_sys_seq must be true, otherwise ESP_ERR_INVALID_ARG is returned.

Returns

• ESP_OK: success

• ESP_ERR_WIFI_IF: Invalid interface

• ESP_ERR_INVALID_ARG: Invalid parameter

• ESP_ERR_WIFI_NO_MEM: out of memory

esp_err_t esp_wifi_set_csi_rx_cb(wifi_csi_cb_t cb, void *ctx)

Register the RX callback function of CSI data.

   Each time a CSI data is received, the callback function will be called.

Parameters

• cb – callback

• ctx – context argument, passed to callback function

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

esp_err_t esp_wifi_set_csi_config(const wifi_csi_config_t *config)

Set CSI data configuration.

return

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start or promiscuous mode is not enabled

• ESP_ERR_INVALID_ARG: invalid argument

Parameters

config – configuration

esp_err_t esp_wifi_set_csi(bool en)

Enable or disable CSI.

return

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start or promiscuous mode is not enabled

• ESP_ERR_INVALID_ARG: invalid argument

Parameters

en – true - enable, false - disable

esp_err_t esp_wifi_set_ant_gpio(const wifi_ant_gpio_config_t *config)

Set antenna GPIO configuration.

Parameters

config – Antenna GPIO configuration.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: Invalid argument, e.g. parameter is NULL, invalid GPIO number etc

esp_err_t esp_wifi_get_ant_gpio(wifi_ant_gpio_config_t *config)

Get current antenna GPIO configuration.

Parameters

config – Antenna GPIO configuration.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument, e.g. parameter is NULL

esp_err_t esp_wifi_set_ant(const wifi_ant_config_t *config)

Set antenna configuration.

Parameters

config – Antenna configuration.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: Invalid argument, e.g. parameter is NULL, invalid antenna mode or invalid GPIO number

esp_err_t esp_wifi_get_ant(wifi_ant_config_t *config)

Get current antenna configuration.

Parameters

config – Antenna configuration.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument, e.g. parameter is NULL

int64_t esp_wifi_get_tsf_time(wifi_interface_t interface)

Get the TSF time In Station mode or SoftAP+Station mode if station is not connected or station doesn’t receive at least one beacon after connected, will return 0.

Attention

Enabling power save may cause the return value inaccurate, except WiFi modem sleep

Parameters

interface – The interface whose tsf_time is to be retrieved.

Returns

0 or the TSF time

esp_err_t esp_wifi_set_inactive_time(wifi_interface_t ifx, uint16_t sec)

Set the inactive time of the ESP32 STA or AP.

Attention

1. For Station, If the station does not receive a beacon frame from the connected SoftAP during the inactive time, disconnect from SoftAP. Default 6s.

Attention

2. For SoftAP, If the softAP doesn’t receive any data from the connected STA during inactive time, the softAP will force deauth the STA. Default is 300s.

Attention

3. The inactive time configuration is not stored into flash

Parameters

• ifx – interface to be configured.

• sec – Inactive time. Unit seconds.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_INVALID_ARG: invalid argument, For Station, if sec is less than 3. For SoftAP, if sec is less than 10.

esp_err_t esp_wifi_get_inactive_time(wifi_interface_t ifx, uint16_t *sec)

Get inactive time of specified interface.

Parameters

• ifx – Interface to be configured.

• sec – Inactive time. Unit seconds.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_statis_dump(uint32_t modules)

Dump WiFi statistics.

Parameters

modules – statistic modules to be dumped

Returns

• ESP_OK: succeed

• others: failed

esp_err_t esp_wifi_set_rssi_threshold(int32_t rssi)

Set RSSI threshold, if average rssi gets lower than threshold, WiFi task will post event WIFI_EVENT_STA_BSS_RSSI_LOW.

Attention

If the user wants to receive another WIFI_EVENT_STA_BSS_RSSI_LOW event after receiving one, this API needs to be called again with an updated/same RSSI threshold.

Parameters

rssi – threshold value in dbm between -100 to 10 Note that in some rare cases where signal strength is very strong, rssi values can be slightly positive.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_ftm_initiate_session(wifi_ftm_initiator_cfg_t *cfg)

Start an FTM Initiator session by sending FTM request If successful, event WIFI_EVENT_FTM_REPORT is generated with the result of the FTM procedure.

Attention

1. Use this API only in Station mode.

Attention

2. If FTM is initiated on a different channel than Station is connected in or internal SoftAP is started in, FTM defaults to a single burst in ASAP mode.

Parameters

cfg – FTM Initiator session configuration

Returns

• ESP_OK: succeed

• others: failed

esp_err_t esp_wifi_ftm_end_session(void)

End the ongoing FTM Initiator session.

Attention

This API works only on FTM Initiator

Returns

• ESP_OK: succeed

• others: failed

esp_err_t esp_wifi_ftm_resp_set_offset(int16_t offset_cm)

Set offset in cm for FTM Responder. An equivalent offset is calculated in picoseconds and added in TOD of FTM Measurement frame (T1).

Attention

Use this API only in AP mode before performing FTM as responder

Parameters

offset_cm – T1 Offset to be added in centimeters

Returns

• ESP_OK: succeed

• others: failed

esp_err_t esp_wifi_ftm_get_report(wifi_ftm_report_entry_t *report, uint8_t num_entries)

Get FTM measurements report copied into a user provided buffer.

Attention

1. To get the FTM report, user first needs to allocate a buffer of size (sizeof(wifi_ftm_report_entry_t) * num_entries) where the API will fill up to num_entries valid FTM measurements in the buffer. Total number of entries can be found in the event WIFI_EVENT_FTM_REPORT as ftm_report_num_entries

Attention

2. The internal FTM report is freed upon use of this API which means the API can only be used once afer every FTM session initiated

Attention

3. Passing the buffer as NULL merely frees the FTM report

Parameters

• report – Pointer to the buffer for receiving the FTM report

• num_entries – Number of FTM report entries to be filled in the report

Returns

• ESP_OK: succeed

• others: failed

esp_err_t esp_wifi_config_11b_rate(wifi_interface_t ifx, bool disable)

Enable or disable 11b rate of specified interface.

Attention

1. This API should be called after esp_wifi_init() and before esp_wifi_start().

Attention

2. Only when really need to disable 11b rate call this API otherwise don’t call this.

Parameters

• ifx – Interface to be configured.

• disable – true means disable 11b rate while false means enable 11b rate.

Returns

• ESP_OK: succeed

• others: failed

esp_err_t esp_wifi_connectionless_module_set_wake_interval(uint16_t wake_interval)

Set wake interval for connectionless modules to wake up periodically.

Attention

1. Only one wake interval for all connectionless modules.

Attention

2. This configuration could work at connected status. When ESP_WIFI_STA_DISCONNECTED_PM_ENABLE is enabled, this configuration could work at disconnected status.

Attention

3. Event WIFI_EVENT_CONNECTIONLESS_MODULE_WAKE_INTERVAL_START would be posted each time wake interval starts.

Attention

4. Recommend to configure interval in multiples of hundred. (e.g. 100ms)

Attention

5. Recommend to configure interval to ESP_WIFI_CONNECTIONLESS_INTERVAL_DEFAULT_MODE to get stable performance at coexistence mode.

Parameters

wake_interval – Milliseconds after would the chip wake up, from 1 to 65535.

esp_err_t esp_wifi_force_wakeup_acquire(void)

Request extra reference of Wi-Fi radio. Wi-Fi keep active state(RF opened) to be able to receive packets.

Attention

Please pair the use of esp_wifi_force_wakeup_acquire with esp_wifi_force_wakeup_release.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

esp_err_t esp_wifi_force_wakeup_release(void)

Release extra reference of Wi-Fi radio. Wi-Fi go to sleep state(RF closed) if no more use of radio.

Attention

Please pair the use of esp_wifi_force_wakeup_acquire with esp_wifi_force_wakeup_release.

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start

esp_err_t esp_wifi_set_country_code(const char *country, bool ieee80211d_enabled)

configure country

Attention

1. When ieee80211d_enabled, the country info of the AP to which the station is connected is used. E.g. if the configured country is US and the country info of the AP to which the station is connected is JP then the country info that will be used is JP. If the station disconnected from the AP the country info is set back to the country info of the station automatically, US in the example.

Attention

2. When ieee80211d_enabled is disabled, then the configured country info is used always.

Attention

3. When the country info is changed because of configuration or because the station connects to a different external AP, the country IE in probe response/beacon of the soft-AP is also changed.

Attention

4. The country configuration is stored into flash.

Attention

5. When this API is called, the PHY init data will switch to the PHY init data type corresponding to the country info.

Attention

6. Supported country codes are “01”(world safe mode) “AT”,”AU”,”BE”,”BG”,”BR”, “CA”,”CH”,”CN”,”CY”,”CZ”,”DE”,”DK”,”EE”,”ES”,”FI”,”FR”,”GB”,”GR”,”HK”,”HR”,”HU”, “IE”,”IN”,”IS”,”IT”,”JP”,”KR”,”LI”,”LT”,”LU”,”LV”,”MT”,”MX”,”NL”,”NO”,”NZ”,”PL”,”PT”, “RO”,”SE”,”SI”,”SK”,”TW”,”US”

Attention

7. When country code “01” (world safe mode) is set, SoftAP mode won’t contain country IE.

Attention

8. The default country is “01” (world safe mode) and ieee80211d_enabled is TRUE.

Attention

9. The third octet of country code string is one of the following: ‘ ‘, ‘O’, ‘I’, ‘X’, otherwise it is considered as ‘ ‘.

Parameters

• country – the configured country ISO code

• ieee80211d_enabled – 802.11d is enabled or not

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_get_country_code(char *country)

get the current country code

Parameters

country – country code

Returns

• ESP_OK: succeed

• ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

• ESP_ERR_INVALID_ARG: invalid argument

esp_err_t esp_wifi_config_80211_tx_rate(wifi_interface_t ifx, wifi_phy_rate_t rate)

Config 80211 tx rate of specified interface.

Attention

1. This API should be called after esp_wifi_init() and before esp_wifi_start().

Parameters

• ifx – Interface to be configured.

• rate – Phy rate to be configured.

Returns

• ESP_OK: succeed

• others: failed

esp_err_t esp_wifi_disable_pmf_config(wifi_interface_t ifx)

Disable PMF configuration for specified interface.

Attention

This API should be called after esp_wifi_set_config() and before esp_wifi_start().

Parameters

ifx – Interface to be configured.

Returns

• ESP_OK: succeed

• others: failed

esp_err_t esp_wifi_sta_get_aid(uint16_t *aid)

Get the Association id assigned to STA by AP.

Attention

aid = 0 if station is not connected to AP.

Parameters

aid – [out] store the aid

Returns

• ESP_OK: succeed

esp_err_t esp_wifi_sta_get_negotiated_phymode(wifi_phy_mode_t *phymode)

Get the negotiated phymode after connection.

Parameters

phymode – [out] store the negotiated phymode.

Returns

• ESP_OK: succeed

esp_err_t esp_wifi_sta_get_rssi(int *rssi)

Get the rssi information of AP to which the device is associated with.

Attention

1. This API should be called after station connected to AP.

Attention

2. Use this API only in WIFI_MODE_STA or WIFI_MODE_APSTA mode.

Parameters

rssi – store the rssi info received from last beacon.

Returns

• ESP_OK: succeed

• ESP_ERR_INVALID_ARG: invalid argument

• ESP_FAIL: failed

Structures

struct wifi_init_config_t

WiFi stack configuration parameters passed to esp_wifi_init call.

Public Members

wifi_osi_funcs_t *osi_funcs

WiFi OS functions

wpa_crypto_funcs_t wpa_crypto_funcs

WiFi station crypto functions when connect

int static_rx_buf_num

WiFi static RX buffer number

int dynamic_rx_buf_num

WiFi dynamic RX buffer number

int tx_buf_type

WiFi TX buffer type

int static_tx_buf_num

WiFi static TX buffer number

int dynamic_tx_buf_num

WiFi dynamic TX buffer number

int rx_mgmt_buf_type

WiFi RX MGMT buffer type

int rx_mgmt_buf_num

WiFi RX MGMT buffer number

int cache_tx_buf_num

WiFi TX cache buffer number

int csi_enable

WiFi channel state information enable flag

int ampdu_rx_enable

WiFi AMPDU RX feature enable flag

int ampdu_tx_enable

WiFi AMPDU TX feature enable flag

int amsdu_tx_enable

WiFi AMSDU TX feature enable flag

int nvs_enable

WiFi NVS flash enable flag

int nano_enable

Nano option for printf/scan family enable flag

int rx_ba_win

WiFi Block Ack RX window size

int wifi_task_core_id

WiFi Task Core ID

int beacon_max_len

WiFi softAP maximum length of the beacon

int mgmt_sbuf_num

WiFi management short buffer number, the minimum value is 6, the maximum value is 32

uint64_t feature_caps

Enables additional WiFi features and capabilities

bool sta_disconnected_pm

WiFi Power Management for station at disconnected status

int espnow_max_encrypt_num

Maximum encrypt number of peers supported by espnow

int magic

WiFi init magic number, it should be the last field

Macros

ESP_ERR_WIFI_NOT_INIT

WiFi driver was not installed by esp_wifi_init

ESP_ERR_WIFI_NOT_STARTED

WiFi driver was not started by esp_wifi_start

ESP_ERR_WIFI_NOT_STOPPED

WiFi driver was not stopped by esp_wifi_stop

ESP_ERR_WIFI_IF

WiFi interface error

ESP_ERR_WIFI_MODE

WiFi mode error

ESP_ERR_WIFI_STATE

WiFi internal state error

ESP_ERR_WIFI_CONN

WiFi internal control block of station or soft-AP error

ESP_ERR_WIFI_NVS

WiFi internal NVS module error

ESP_ERR_WIFI_MAC

MAC address is invalid

ESP_ERR_WIFI_SSID

SSID is invalid

ESP_ERR_WIFI_PASSWORD

Password is invalid

ESP_ERR_WIFI_TIMEOUT

Timeout error

ESP_ERR_WIFI_WAKE_FAIL

WiFi is in sleep state(RF closed) and wakeup fail

ESP_ERR_WIFI_WOULD_BLOCK

The caller would block

ESP_ERR_WIFI_NOT_CONNECT

Station still in disconnect status

ESP_ERR_WIFI_POST

Failed to post the event to WiFi task

ESP_ERR_WIFI_INIT_STATE

Invalid WiFi state when init/deinit is called

ESP_ERR_WIFI_STOP_STATE

Returned when WiFi is stopping

ESP_ERR_WIFI_NOT_ASSOC

The WiFi connection is not associated

ESP_ERR_WIFI_TX_DISALLOW

The WiFi TX is disallowed

ESP_ERR_WIFI_DISCARD

Discard frame

ESP_ERR_WIFI_ROC_IN_PROGRESS

ROC op is in progress

WIFI_STATIC_TX_BUFFER_NUM

WIFI_CACHE_TX_BUFFER_NUM

WIFI_DYNAMIC_TX_BUFFER_NUM

WIFI_RX_MGMT_BUF_NUM_DEF

WIFI_CSI_ENABLED

WIFI_AMPDU_RX_ENABLED

WIFI_AMPDU_TX_ENABLED

WIFI_AMSDU_TX_ENABLED

WIFI_NVS_ENABLED

WIFI_NANO_FORMAT_ENABLED

WIFI_INIT_CONFIG_MAGIC

WIFI_DEFAULT_RX_BA_WIN

WIFI_TASK_CORE_ID

WIFI_SOFTAP_BEACON_MAX_LEN

WIFI_MGMT_SBUF_NUM

WIFI_STA_DISCONNECTED_PM_ENABLED

WIFI_ENABLE_WPA3_SAE

WIFI_ENABLE_SPIRAM

WIFI_FTM_INITIATOR

WIFI_FTM_RESPONDER

WIFI_ENABLE_GCMP

WIFI_ENABLE_GMAC

WIFI_ENABLE_11R

WIFI_ENABLE_ENTERPRISE

CONFIG_FEATURE_WPA3_SAE_BIT

CONFIG_FEATURE_CACHE_TX_BUF_BIT

CONFIG_FEATURE_FTM_INITIATOR_BIT

CONFIG_FEATURE_FTM_RESPONDER_BIT

CONFIG_FEATURE_GCMP_BIT

CONFIG_FEATURE_GMAC_BIT

CONFIG_FEATURE_11R_BIT

CONFIG_FEATURE_WIFI_ENT_BIT

WIFI_FEATURE_CAPS

WIFI_INIT_CONFIG_DEFAULT()

ESP_WIFI_CONNECTIONLESS_INTERVAL_DEFAULT_MODE

Type Definitions

typedef void (*wifi_promiscuous_cb_t)(void *buf, wifi_promiscuous_pkt_type_t type)

The RX callback function in the promiscuous mode. Each time a packet is received, the callback function will be called.

Param buf

Data received. Type of data in buffer (wifi_promiscuous_pkt_t or wifi_pkt_rx_ctrl_t) indicated by ‘type’ parameter.

Param type

promiscuous packet type.

typedef void (*esp_vendor_ie_cb_t)(void *ctx, wifi_vendor_ie_type_t type, const uint8_t sa[6], const vendor_ie_data_t *vnd_ie, int rssi)

Function signature for received Vendor-Specific Information Element callback.

Param ctx

Context argument, as passed to esp_wifi_set_vendor_ie_cb() when registering callback.

Param type

Information element type, based on frame type received.

Param sa

Source 802.11 address.

Param vnd_ie

Pointer to the vendor specific element data received.

Param rssi

Received signal strength indication.

typedef void (*wifi_csi_cb_t)(void *ctx, wifi_csi_info_t *data)

The RX callback function of Channel State Information(CSI) data.

   Each time a CSI data is received, the callback function will be called.

Param ctx

context argument, passed to esp_wifi_set_csi_rx_cb() when registering callback function.

Param data

CSI data received. The memory that it points to will be deallocated after callback function returns.

Header File

• components/esp_wifi/include/esp_wifi_types.h

Unions

union wifi_config_t

#include <esp_wifi_types.h>

Configuration data for ESP32 AP or STA.

The usage of this union (for ap or sta configuration) is determined by the accompanying interface argument passed to esp_wifi_set_config() or esp_wifi_get_config()

Public Members

wifi_ap_config_t ap

configuration of AP

wifi_sta_config_t sta

configuration of STA

Structures

struct wifi_country_t

Structure describing WiFi country-based regional restrictions.

Public Members

char cc[3]

country code string

uint8_t schan

start channel

uint8_t nchan

total channel number

int8_t max_tx_power

This field is used for getting WiFi maximum transmitting power, call esp_wifi_set_max_tx_power to set the maximum transmitting power.

wifi_country_policy_t policy

country policy

struct wifi_active_scan_time_t

Range of active scan times per channel.

Public Members

uint32_t min

minimum active scan time per channel, units: millisecond

uint32_t max

maximum active scan time per channel, units: millisecond, values above 1500ms may cause station to disconnect from AP and are not recommended.

struct wifi_scan_time_t

Aggregate of active & passive scan time per channel.

Public Members

wifi_active_scan_time_t active

active scan time per channel, units: millisecond.

uint32_t passive

passive scan time per channel, units: millisecond, values above 1500ms may cause station to disconnect from AP and are not recommended.

struct wifi_scan_config_t

Parameters for an SSID scan.

Public Members

uint8_t *ssid

SSID of AP

uint8_t *bssid

MAC address of AP

uint8_t channel

channel, scan the specific channel

bool show_hidden

enable to scan AP whose SSID is hidden

wifi_scan_type_t scan_type

scan type, active or passive

wifi_scan_time_t scan_time

scan time per channel

uint8_t home_chan_dwell_time

time spent at home channel between scanning consecutive channels.

struct wifi_ap_record_t

Description of a WiFi AP.

Public Members

uint8_t bssid[6]

MAC address of AP

uint8_t ssid[33]

SSID of AP

uint8_t primary

channel of AP

wifi_second_chan_t second

secondary channel of AP

int8_t rssi

signal strength of AP. Note that in some rare cases where signal strength is very strong, rssi values can be slightly positive

wifi_auth_mode_t authmode

authmode of AP

wifi_cipher_type_t pairwise_cipher

pairwise cipher of AP

wifi_cipher_type_t group_cipher

group cipher of AP

wifi_ant_t ant

antenna used to receive beacon from AP

uint32_t phy_11b

bit: 0 flag to identify if 11b mode is enabled or not

uint32_t phy_11g

bit: 1 flag to identify if 11g mode is enabled or not

uint32_t phy_11n

bit: 2 flag to identify if 11n mode is enabled or not

uint32_t phy_lr

bit: 3 flag to identify if low rate is enabled or not

uint32_t wps

bit: 4 flag to identify if WPS is supported or not

uint32_t ftm_responder

bit: 5 flag to identify if FTM is supported in responder mode

uint32_t ftm_initiator

bit: 6 flag to identify if FTM is supported in initiator mode

uint32_t reserved

bit: 7..31 reserved

wifi_country_t country

country information of AP

struct wifi_scan_threshold_t

Structure describing parameters for a WiFi fast scan.

Public Members

int8_t rssi

The minimum rssi to accept in the fast scan mode

wifi_auth_mode_t authmode

The weakest authmode to accept in the fast scan mode Note: Incase this value is not set and password is set as per WPA2 standards(password len >= 8), it will be defaulted to WPA2 and device won’t connect to deprecated WEP/WPA networks. Please set authmode threshold as WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK to connect to WEP/WPA networks

struct wifi_pmf_config_t

Configuration structure for Protected Management Frame

Public Members

bool capable

Deprecated variable. Device will always connect in PMF mode if other device also advertizes PMF capability.

bool required

Advertizes that Protected Management Frame is required. Device will not associate to non-PMF capable devices.

struct wifi_ap_config_t

Soft-AP configuration settings for the ESP32.

Public Members

uint8_t ssid[32]

SSID of ESP32 soft-AP. If ssid_len field is 0, this must be a Null terminated string. Otherwise, length is set according to ssid_len.

uint8_t password[64]

Password of ESP32 soft-AP.

uint8_t ssid_len

Optional length of SSID field.

uint8_t channel

Channel of soft-AP

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.

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

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

wifi_cipher_type_t pairwise_cipher

Pairwise cipher of SoftAP, group cipher will be derived using this. Cipher values are valid starting from WIFI_CIPHER_TYPE_TKIP, enum values before that will be considered as invalid and default cipher suites(TKIP+CCMP) will be used. Valid cipher suites in softAP mode are WIFI_CIPHER_TYPE_TKIP, WIFI_CIPHER_TYPE_CCMP and WIFI_CIPHER_TYPE_TKIP_CCMP.

bool ftm_responder

Enable FTM Responder mode

wifi_pmf_config_t pmf_cfg

Configuration for Protected Management Frame

struct wifi_sta_config_t

STA configuration settings for the ESP32.

Public Members

uint8_t ssid[32]

SSID of target AP.

uint8_t password[64]

Password of target AP.

wifi_scan_method_t scan_method

do all channel scan or fast scan

bool bssid_set

whether set MAC address of target AP or not. Generally, station_config.bssid_set needs to be 0; and it needs to be 1 only when users need to check the MAC address of the AP.

uint8_t bssid[6]

MAC address of target AP

uint8_t channel

channel of target AP. Set to 1~13 to scan starting from the specified channel before connecting to AP. If the channel of AP is unknown, set it to 0.

uint16_t listen_interval

Listen interval for ESP32 station to receive beacon when WIFI_PS_MAX_MODEM is set. Units: AP beacon intervals. Defaults to 3 if set to 0.

wifi_sort_method_t sort_method

sort the connect AP in the list by rssi or security mode

wifi_scan_threshold_t threshold

When scan_threshold is set, only APs which have an auth mode that is more secure than the selected auth mode and a signal stronger than the minimum RSSI will be used.

wifi_pmf_config_t pmf_cfg

Configuration for Protected Management Frame. Will be advertised in RSN Capabilities in RSN IE.

uint32_t rm_enabled

Whether Radio Measurements are enabled for the connection

uint32_t btm_enabled

Whether BSS Transition Management is enabled for the connection

uint32_t mbo_enabled

Whether MBO is enabled for the connection

uint32_t ft_enabled

Whether FT is enabled for the connection

uint32_t owe_enabled

Whether OWE is enabled for the connection

uint32_t transition_disable

Whether to enable transition disable feature

uint32_t reserved

Reserved for future feature set

wifi_sae_pwe_method_t sae_pwe_h2e

Configuration for SAE PWE derivation method

uint8_t failure_retry_cnt

Number of connection retries station will do before moving to next AP. scan_method should be set as WIFI_ALL_CHANNEL_SCAN to use this config. Note: Enabling this may cause connection time to increase incase best AP doesn’t behave properly.

struct wifi_sta_info_t

Description of STA associated with AP.

Public Members

uint8_t mac[6]

mac address

int8_t rssi

current average rssi of sta connected

uint32_t phy_11b

bit: 0 flag to identify if 11b mode is enabled or not

uint32_t phy_11g

bit: 1 flag to identify if 11g mode is enabled or not

uint32_t phy_11n

bit: 2 flag to identify if 11n mode is enabled or not

uint32_t phy_lr

bit: 3 flag to identify if low rate is enabled or not

uint32_t is_mesh_child

bit: 4 flag to identify mesh child

uint32_t reserved

bit: 5..31 reserved

struct wifi_sta_list_t

List of stations associated with the ESP32 Soft-AP.

Public Members

wifi_sta_info_t sta[ESP_WIFI_MAX_CONN_NUM]

station list

int num

number of stations in the list (other entries are invalid)

struct vendor_ie_data_t

Vendor Information Element header.

The first bytes of the Information Element will match this header. Payload follows.

Public Members

uint8_t element_id

Should be set to WIFI_VENDOR_IE_ELEMENT_ID (0xDD)

uint8_t length

Length of all bytes in the element data following this field. Minimum 4.

uint8_t vendor_oui[3]

Vendor identifier (OUI).

uint8_t vendor_oui_type

Vendor-specific OUI type.

uint8_t payload[0]

Payload. Length is equal to value in ‘length’ field, minus 4.

struct wifi_pkt_rx_ctrl_t

Received packet radio metadata header, this is the common header at the beginning of all promiscuous mode RX callback buffers.

Public Members

signed rssi

Received Signal Strength Indicator(RSSI) of packet. unit: dBm

unsigned rate

PHY rate encoding of the packet. Only valid for non HT(11bg) packet

unsigned __pad0__

reserved

unsigned sig_mode

0: non HT(11bg) packet; 1: HT(11n) packet; 3: VHT(11ac) packet

unsigned __pad1__

reserved

unsigned mcs

Modulation Coding Scheme. If is HT(11n) packet, shows the modulation, range from 0 to 76(MSC0 ~ MCS76)

unsigned cwb

Channel Bandwidth of the packet. 0: 20MHz; 1: 40MHz

unsigned __pad2__

reserved

unsigned smoothing

reserved

unsigned not_sounding

reserved

unsigned __pad3__

reserved

unsigned aggregation

Aggregation. 0: MPDU packet; 1: AMPDU packet

unsigned stbc

Space Time Block Code(STBC). 0: non STBC packet; 1: STBC packet

unsigned fec_coding

Flag is set for 11n packets which are LDPC

unsigned sgi

Short Guide Interval(SGI). 0: Long GI; 1: Short GI

unsigned __pad4__

reserved

unsigned ampdu_cnt

ampdu cnt

unsigned channel

primary channel on which this packet is received

unsigned secondary_channel

secondary channel on which this packet is received. 0: none; 1: above; 2: below

unsigned __pad5__

reserved

unsigned timestamp

timestamp. The local time when this packet is received. It is precise only if modem sleep or light sleep is not enabled. unit: microsecond

unsigned __pad6__

reserved

unsigned __pad7__

reserved

unsigned __pad8__

reserved

unsigned ant

antenna number from which this packet is received. 0: WiFi antenna 0; 1: WiFi antenna 1

signed noise_floor

noise floor of Radio Frequency Module(RF). unit: dBm

unsigned __pad9__

reserved

unsigned sig_len

length of packet including Frame Check Sequence(FCS)

unsigned __pad10__

reserved

unsigned rx_state

state of the packet. 0: no error; others: error numbers which are not public

struct wifi_promiscuous_pkt_t

Payload passed to ‘buf’ parameter of promiscuous mode RX callback.

Public Members

wifi_pkt_rx_ctrl_t rx_ctrl

metadata header

uint8_t payload[0]

Data or management payload. Length of payload is described by rx_ctrl.sig_len. Type of content determined by packet type argument of callback.

struct wifi_promiscuous_filter_t

Mask for filtering different packet types in promiscuous mode.

Public Members

uint32_t filter_mask

OR of one or more filter values WIFI_PROMIS_FILTER_*

struct wifi_csi_config_t

Channel state information(CSI) configuration type.

Public Members

bool lltf_en

enable to receive legacy long training field(lltf) data. Default enabled

bool htltf_en

enable to receive HT long training field(htltf) data. Default enabled

bool stbc_htltf2_en

enable to receive space time block code HT long training field(stbc-htltf2) data. Default enabled

bool ltf_merge_en

enable to generate htlft data by averaging lltf and ht_ltf data when receiving HT packet. Otherwise, use ht_ltf data directly. Default enabled

bool channel_filter_en

enable to turn on channel filter to smooth adjacent sub-carrier. Disable it to keep independence of adjacent sub-carrier. Default enabled

bool manu_scale

manually scale the CSI data by left shifting or automatically scale the CSI data. If set true, please set the shift bits. false: automatically. true: manually. Default false

uint8_t shift

manually left shift bits of the scale of the CSI data. The range of the left shift bits is 0~15

bool dump_ack_en

enable to dump 802.11 ACK frame, default disabled

struct wifi_csi_info_t

CSI data type.

Public Members

wifi_pkt_rx_ctrl_t rx_ctrl

received packet radio metadata header of the CSI data

uint8_t mac[6]

source MAC address of the CSI data

uint8_t dmac[6]

destination MAC address of the CSI data

bool first_word_invalid

first four bytes of the CSI data is invalid or not

int8_t *buf

buffer of CSI data

uint16_t len

length of CSI data

struct wifi_ant_gpio_t

WiFi GPIO configuration for antenna selection.

Public Members

uint8_t gpio_select

Whether this GPIO is connected to external antenna switch

uint8_t gpio_num

The GPIO number that connects to external antenna switch

struct wifi_ant_gpio_config_t

WiFi GPIOs configuration for antenna selection.

Public Members

wifi_ant_gpio_t gpio_cfg[4]

The configurations of GPIOs that connect to external antenna switch

struct wifi_ant_config_t

WiFi antenna configuration.

Public Members

wifi_ant_mode_t rx_ant_mode

WiFi antenna mode for receiving

wifi_ant_t rx_ant_default

Default antenna mode for receiving, it’s ignored if rx_ant_mode is not WIFI_ANT_MODE_AUTO

wifi_ant_mode_t tx_ant_mode

WiFi antenna mode for transmission, it can be set to WIFI_ANT_MODE_AUTO only if rx_ant_mode is set to WIFI_ANT_MODE_AUTO

uint8_t enabled_ant0

Index (in antenna GPIO configuration) of enabled WIFI_ANT_MODE_ANT0

uint8_t enabled_ant1

Index (in antenna GPIO configuration) of enabled WIFI_ANT_MODE_ANT1

struct wifi_action_tx_req_t

Action Frame Tx Request.

Public Members

wifi_interface_t ifx

WiFi interface to send request to

uint8_t dest_mac[6]

Destination MAC address

bool no_ack

Indicates no ack required

wifi_action_rx_cb_t rx_cb

Rx Callback to receive any response

uint32_t data_len

Length of the appended Data

uint8_t data[0]

Appended Data payload

struct wifi_ftm_initiator_cfg_t

FTM Initiator configuration.

Public Members

uint8_t resp_mac[6]

MAC address of the FTM Responder

uint8_t channel

Primary channel of the FTM Responder

uint8_t frm_count

No. of FTM frames requested in terms of 4 or 8 bursts (allowed values - 0(No pref), 16, 24, 32, 64)

uint16_t burst_period

Requested period between FTM bursts in 100’s of milliseconds (allowed values 0(No pref) - 100)

bool use_get_report_api

True - Using esp_wifi_ftm_get_report to get FTM report, False - Using ftm_report_data from WIFI_EVENT_FTM_REPORT to get FTM report

struct wifi_event_sta_scan_done_t

Argument structure for WIFI_EVENT_SCAN_DONE event

Public Members

uint32_t status

status of scanning APs: 0 — success, 1 - failure

uint8_t number

number of scan results

uint8_t scan_id

scan sequence number, used for block scan

struct wifi_event_sta_connected_t

Argument structure for WIFI_EVENT_STA_CONNECTED event

Public Members

uint8_t ssid[32]

SSID of connected AP

uint8_t ssid_len

SSID length of connected AP

uint8_t bssid[6]

BSSID of connected AP

uint8_t channel

channel of connected AP

wifi_auth_mode_t authmode

authentication mode used by AP

struct wifi_event_sta_disconnected_t

Argument structure for WIFI_EVENT_STA_DISCONNECTED event

Public Members

uint8_t ssid[32]

SSID of disconnected AP

uint8_t ssid_len

SSID length of disconnected AP

uint8_t bssid[6]

BSSID of disconnected AP

uint8_t reason

reason of disconnection

int8_t rssi

rssi of disconnection

struct wifi_event_sta_authmode_change_t

Argument structure for WIFI_EVENT_STA_AUTHMODE_CHANGE event

Public Members

wifi_auth_mode_t old_mode

the old auth mode of AP

wifi_auth_mode_t new_mode

the new auth mode of AP

struct wifi_event_sta_wps_er_pin_t

Argument structure for WIFI_EVENT_STA_WPS_ER_PIN event

Public Members

uint8_t pin_code[8]

PIN code of station in enrollee mode

struct wifi_event_sta_wps_er_success_t

Argument structure for WIFI_EVENT_STA_WPS_ER_SUCCESS event

Public Members

uint8_t ap_cred_cnt

Number of AP credentials received

uint8_t ssid[MAX_SSID_LEN]

SSID of AP

uint8_t passphrase[MAX_PASSPHRASE_LEN]

Passphrase for the AP

struct wifi_event_sta_wps_er_success_t::[anonymous] ap_cred[MAX_WPS_AP_CRED]

All AP credentials received from WPS handshake

struct wifi_event_ap_staconnected_t

Argument structure for WIFI_EVENT_AP_STACONNECTED event

Public Members

uint8_t mac[6]

MAC address of the station connected to ESP32 soft-AP

uint8_t aid

the aid that ESP32 soft-AP gives to the station connected to

bool is_mesh_child

flag to identify mesh child

struct wifi_event_ap_stadisconnected_t

Argument structure for WIFI_EVENT_AP_STADISCONNECTED event

Public Members

uint8_t mac[6]

MAC address of the station disconnects to ESP32 soft-AP

uint8_t aid

the aid that ESP32 soft-AP gave to the station disconnects to

bool is_mesh_child

flag to identify mesh child

struct wifi_event_ap_probe_req_rx_t

Argument structure for WIFI_EVENT_AP_PROBEREQRECVED event

Public Members

int rssi

Received probe request signal strength

uint8_t mac[6]

MAC address of the station which send probe request

struct wifi_event_bss_rssi_low_t

Argument structure for WIFI_EVENT_STA_BSS_RSSI_LOW event

Public Members

int32_t rssi

RSSI value of bss

struct wifi_ftm_report_entry_t

Argument structure for

Public Members

uint8_t dlog_token

Dialog Token of the FTM frame

int8_t rssi

RSSI of the FTM frame received

uint32_t rtt

Round Trip Time in pSec with a peer

uint64_t t1

Time of departure of FTM frame from FTM Responder in pSec

uint64_t t2

Time of arrival of FTM frame at FTM Initiator in pSec

uint64_t t3

Time of departure of ACK from FTM Initiator in pSec

uint64_t t4

Time of arrival of ACK at FTM Responder in pSec

struct wifi_event_ftm_report_t

Argument structure for WIFI_EVENT_FTM_REPORT event

Public Members

uint8_t peer_mac[6]

MAC address of the FTM Peer

wifi_ftm_status_t status

Status of the FTM operation

uint32_t rtt_raw

Raw average Round-Trip-Time with peer in Nano-Seconds

uint32_t rtt_est

Estimated Round-Trip-Time with peer in Nano-Seconds

uint32_t dist_est

Estimated one-way distance in Centi-Meters

wifi_ftm_report_entry_t *ftm_report_data

Pointer to FTM Report, should be freed after use. Note: Highly recommended to use API esp_wifi_ftm_get_report to get the report instead of using this

uint8_t ftm_report_num_entries

Number of entries in the FTM Report data

struct wifi_event_action_tx_status_t

Argument structure for WIFI_EVENT_ACTION_TX_STATUS event

Public Members

wifi_interface_t ifx

WiFi interface to send request to

uint32_t context

Context to identify the request

uint8_t da[6]

Destination MAC address

uint8_t status

Status of the operation

struct wifi_event_roc_done_t

Argument structure for WIFI_EVENT_ROC_DONE event

Public Members

uint32_t context

Context to identify the request

struct wifi_event_ap_wps_rg_pin_t

Argument structure for WIFI_EVENT_AP_WPS_RG_PIN event

Public Members

uint8_t pin_code[8]

PIN code of station in enrollee mode

struct wifi_event_ap_wps_rg_fail_reason_t

Argument structure for WIFI_EVENT_AP_WPS_RG_FAILED event

Public Members

wps_fail_reason_t reason

WPS failure reason wps_fail_reason_t

uint8_t peer_macaddr[6]

Enrollee mac address

struct wifi_event_ap_wps_rg_success_t

Argument structure for WIFI_EVENT_AP_WPS_RG_SUCCESS event

Public Members

uint8_t peer_macaddr[6]

Enrollee mac address

Macros

WIFI_OFFCHAN_TX_REQ

WIFI_OFFCHAN_TX_CANCEL

WIFI_ROC_REQ

WIFI_ROC_CANCEL

WIFI_PROTOCOL_11B

WIFI_PROTOCOL_11G

WIFI_PROTOCOL_11N

WIFI_PROTOCOL_LR

ESP_WIFI_MAX_CONN_NUM

max number of stations which can connect to ESP32/ESP32S3/ESP32S2 soft-AP

WIFI_VENDOR_IE_ELEMENT_ID

WIFI_PROMIS_FILTER_MASK_ALL

filter all packets

WIFI_PROMIS_FILTER_MASK_MGMT

filter the packets with type of WIFI_PKT_MGMT

WIFI_PROMIS_FILTER_MASK_CTRL

filter the packets with type of WIFI_PKT_CTRL

WIFI_PROMIS_FILTER_MASK_DATA

filter the packets with type of WIFI_PKT_DATA

WIFI_PROMIS_FILTER_MASK_MISC

filter the packets with type of WIFI_PKT_MISC

WIFI_PROMIS_FILTER_MASK_DATA_MPDU

filter the MPDU which is a kind of WIFI_PKT_DATA

WIFI_PROMIS_FILTER_MASK_DATA_AMPDU

filter the AMPDU which is a kind of WIFI_PKT_DATA

WIFI_PROMIS_FILTER_MASK_FCSFAIL

filter the FCS failed packets, do not open it in general

WIFI_PROMIS_CTRL_FILTER_MASK_ALL

filter all control packets

WIFI_PROMIS_CTRL_FILTER_MASK_WRAPPER

filter the control packets with subtype of Control Wrapper

WIFI_PROMIS_CTRL_FILTER_MASK_BAR

filter the control packets with subtype of Block Ack Request

WIFI_PROMIS_CTRL_FILTER_MASK_BA

filter the control packets with subtype of Block Ack

WIFI_PROMIS_CTRL_FILTER_MASK_PSPOLL

filter the control packets with subtype of PS-Poll

WIFI_PROMIS_CTRL_FILTER_MASK_RTS

filter the control packets with subtype of RTS

WIFI_PROMIS_CTRL_FILTER_MASK_CTS

filter the control packets with subtype of CTS

WIFI_PROMIS_CTRL_FILTER_MASK_ACK

filter the control packets with subtype of ACK

WIFI_PROMIS_CTRL_FILTER_MASK_CFEND

filter the control packets with subtype of CF-END

WIFI_PROMIS_CTRL_FILTER_MASK_CFENDACK

filter the control packets with subtype of CF-END+CF-ACK

WIFI_EVENT_MASK_ALL

mask all WiFi events

WIFI_EVENT_MASK_NONE

mask none of the WiFi events

WIFI_EVENT_MASK_AP_PROBEREQRECVED

mask SYSTEM_EVENT_AP_PROBEREQRECVED event

MAX_SSID_LEN

MAX_PASSPHRASE_LEN

MAX_WPS_AP_CRED

WIFI_STATIS_BUFFER

WIFI_STATIS_RXTX

WIFI_STATIS_HW

WIFI_STATIS_DIAG

WIFI_STATIS_PS

WIFI_STATIS_ALL

Type Definitions

typedef int (*wifi_action_rx_cb_t)(uint8_t *hdr, uint8_t *payload, size_t len, uint8_t channel)

The Rx callback function of Action Tx operations.

Param hdr

pointer to the IEEE 802.11 Header structure

Param payload

pointer to the Payload following 802.11 Header

Param len

length of the Payload

Param channel

channel number the frame is received on

Enumerations

enum wifi_mode_t

Values:

enumerator WIFI_MODE_NULL

null mode

enumerator WIFI_MODE_STA

WiFi station mode

enumerator WIFI_MODE_AP

WiFi soft-AP mode

enumerator WIFI_MODE_APSTA

WiFi station + soft-AP mode

enumerator WIFI_MODE_MAX

enum wifi_interface_t

Values:

enumerator WIFI_IF_STA

enumerator WIFI_IF_AP

enum wifi_country_policy_t

Values:

enumerator WIFI_COUNTRY_POLICY_AUTO

Country policy is auto, use the country info of AP to which the station is connected

enumerator WIFI_COUNTRY_POLICY_MANUAL

Country policy is manual, always use the configured country info

enum wifi_auth_mode_t

Values:

enumerator WIFI_AUTH_OPEN

authenticate mode : open

enumerator WIFI_AUTH_WEP

authenticate mode : WEP

enumerator WIFI_AUTH_WPA_PSK

authenticate mode : WPA_PSK

enumerator WIFI_AUTH_WPA2_PSK

authenticate mode : WPA2_PSK

enumerator WIFI_AUTH_WPA_WPA2_PSK

authenticate mode : WPA_WPA2_PSK

enumerator WIFI_AUTH_ENTERPRISE

authenticate mode : WiFi EAP security

enumerator WIFI_AUTH_WPA2_ENTERPRISE

authenticate mode : WiFi EAP security

enumerator WIFI_AUTH_WPA3_PSK

authenticate mode : WPA3_PSK

enumerator WIFI_AUTH_WPA2_WPA3_PSK

authenticate mode : WPA2_WPA3_PSK

enumerator WIFI_AUTH_WAPI_PSK

authenticate mode : WAPI_PSK

enumerator WIFI_AUTH_OWE

authenticate mode : OWE

enumerator WIFI_AUTH_WPA3_ENT_192

authenticate mode : WPA3_ENT_SUITE_B_192_BIT

enumerator WIFI_AUTH_MAX

enum wifi_err_reason_t

Values:

enumerator WIFI_REASON_UNSPECIFIED

enumerator WIFI_REASON_AUTH_EXPIRE

enumerator WIFI_REASON_AUTH_LEAVE

enumerator WIFI_REASON_ASSOC_EXPIRE

enumerator WIFI_REASON_ASSOC_TOOMANY

enumerator WIFI_REASON_NOT_AUTHED

enumerator WIFI_REASON_NOT_ASSOCED

enumerator WIFI_REASON_ASSOC_LEAVE

enumerator WIFI_REASON_ASSOC_NOT_AUTHED

enumerator WIFI_REASON_DISASSOC_PWRCAP_BAD

enumerator WIFI_REASON_DISASSOC_SUPCHAN_BAD

enumerator WIFI_REASON_BSS_TRANSITION_DISASSOC

enumerator WIFI_REASON_IE_INVALID

enumerator WIFI_REASON_MIC_FAILURE

enumerator WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT

enumerator WIFI_REASON_GROUP_KEY_UPDATE_TIMEOUT

enumerator WIFI_REASON_IE_IN_4WAY_DIFFERS

enumerator WIFI_REASON_GROUP_CIPHER_INVALID

enumerator WIFI_REASON_PAIRWISE_CIPHER_INVALID

enumerator WIFI_REASON_AKMP_INVALID

enumerator WIFI_REASON_UNSUPP_RSN_IE_VERSION

enumerator WIFI_REASON_INVALID_RSN_IE_CAP

enumerator WIFI_REASON_802_1X_AUTH_FAILED

enumerator WIFI_REASON_CIPHER_SUITE_REJECTED

enumerator WIFI_REASON_TDLS_PEER_UNREACHABLE

enumerator WIFI_REASON_TDLS_UNSPECIFIED

enumerator WIFI_REASON_SSP_REQUESTED_DISASSOC

enumerator WIFI_REASON_NO_SSP_ROAMING_AGREEMENT

enumerator WIFI_REASON_BAD_CIPHER_OR_AKM

enumerator WIFI_REASON_NOT_AUTHORIZED_THIS_LOCATION

enumerator WIFI_REASON_SERVICE_CHANGE_PERCLUDES_TS

enumerator WIFI_REASON_UNSPECIFIED_QOS

enumerator WIFI_REASON_NOT_ENOUGH_BANDWIDTH

enumerator WIFI_REASON_MISSING_ACKS

enumerator WIFI_REASON_EXCEEDED_TXOP

enumerator WIFI_REASON_STA_LEAVING

enumerator WIFI_REASON_END_BA

enumerator WIFI_REASON_UNKNOWN_BA

enumerator WIFI_REASON_TIMEOUT

enumerator WIFI_REASON_PEER_INITIATED

enumerator WIFI_REASON_AP_INITIATED

enumerator WIFI_REASON_INVALID_FT_ACTION_FRAME_COUNT

enumerator WIFI_REASON_INVALID_PMKID

enumerator WIFI_REASON_INVALID_MDE

enumerator WIFI_REASON_INVALID_FTE

enumerator WIFI_REASON_TRANSMISSION_LINK_ESTABLISH_FAILED

enumerator WIFI_REASON_ALTERATIVE_CHANNEL_OCCUPIED

enumerator WIFI_REASON_BEACON_TIMEOUT

enumerator WIFI_REASON_NO_AP_FOUND

enumerator WIFI_REASON_AUTH_FAIL

enumerator WIFI_REASON_ASSOC_FAIL

enumerator WIFI_REASON_HANDSHAKE_TIMEOUT

enumerator WIFI_REASON_CONNECTION_FAIL

enumerator WIFI_REASON_AP_TSF_RESET

enumerator WIFI_REASON_ROAMING

enumerator WIFI_REASON_ASSOC_COMEBACK_TIME_TOO_LONG

enumerator WIFI_REASON_SA_QUERY_TIMEOUT

enum wifi_second_chan_t

Values:

enumerator WIFI_SECOND_CHAN_NONE

the channel width is HT20

enumerator WIFI_SECOND_CHAN_ABOVE

the channel width is HT40 and the secondary channel is above the primary channel

enumerator WIFI_SECOND_CHAN_BELOW

the channel width is HT40 and the secondary channel is below the primary channel

enum wifi_scan_type_t

Values:

enumerator WIFI_SCAN_TYPE_ACTIVE

active scan

enumerator WIFI_SCAN_TYPE_PASSIVE

passive scan

enum wifi_cipher_type_t

Values:

enumerator WIFI_CIPHER_TYPE_NONE

the cipher type is none

enumerator WIFI_CIPHER_TYPE_WEP40

the cipher type is WEP40

enumerator WIFI_CIPHER_TYPE_WEP104

the cipher type is WEP104

enumerator WIFI_CIPHER_TYPE_TKIP

the cipher type is TKIP

enumerator WIFI_CIPHER_TYPE_CCMP

the cipher type is CCMP

enumerator WIFI_CIPHER_TYPE_TKIP_CCMP

the cipher type is TKIP and CCMP

enumerator WIFI_CIPHER_TYPE_AES_CMAC128

the cipher type is AES-CMAC-128

enumerator WIFI_CIPHER_TYPE_SMS4

the cipher type is SMS4

enumerator WIFI_CIPHER_TYPE_GCMP

the cipher type is GCMP

enumerator WIFI_CIPHER_TYPE_GCMP256

the cipher type is GCMP-256

enumerator WIFI_CIPHER_TYPE_AES_GMAC128

the cipher type is AES-GMAC-128

enumerator WIFI_CIPHER_TYPE_AES_GMAC256

the cipher type is AES-GMAC-256

enumerator WIFI_CIPHER_TYPE_UNKNOWN

the cipher type is unknown

enum wifi_ant_t

WiFi antenna.

Values:

enumerator WIFI_ANT_ANT0

WiFi antenna 0

enumerator WIFI_ANT_ANT1

WiFi antenna 1

enumerator WIFI_ANT_MAX

Invalid WiFi antenna

enum wifi_scan_method_t

Values:

enumerator WIFI_FAST_SCAN

Do fast scan, scan will end after find SSID match AP

enumerator WIFI_ALL_CHANNEL_SCAN

All channel scan, scan will end after scan all the channel

enum wifi_sort_method_t

Values:

enumerator WIFI_CONNECT_AP_BY_SIGNAL

Sort match AP in scan list by RSSI

enumerator WIFI_CONNECT_AP_BY_SECURITY

Sort match AP in scan list by security mode

enum wifi_ps_type_t

Values:

enumerator WIFI_PS_NONE

No power save

enumerator WIFI_PS_MIN_MODEM

Minimum modem power saving. In this mode, station wakes up to receive beacon every DTIM period

enumerator WIFI_PS_MAX_MODEM

Maximum modem power saving. In this mode, interval to receive beacons is determined by the listen_interval parameter in wifi_sta_config_t

enum wifi_bandwidth_t

Values:

enumerator WIFI_BW_HT20

enumerator WIFI_BW_HT40

enum wifi_sae_pwe_method_t

Configuration for SAE PWE derivation

Values:

enumerator WPA3_SAE_PWE_UNSPECIFIED

enumerator WPA3_SAE_PWE_HUNT_AND_PECK

enumerator WPA3_SAE_PWE_HASH_TO_ELEMENT

enumerator WPA3_SAE_PWE_BOTH

enum wifi_storage_t

Values:

enumerator WIFI_STORAGE_FLASH

all configuration will store in both memory and flash

enumerator WIFI_STORAGE_RAM

all configuration will only store in the memory

enum wifi_vendor_ie_type_t

Vendor Information Element type.

Determines the frame type that the IE will be associated with.

Values:

enumerator WIFI_VND_IE_TYPE_BEACON

enumerator WIFI_VND_IE_TYPE_PROBE_REQ

enumerator WIFI_VND_IE_TYPE_PROBE_RESP

enumerator WIFI_VND_IE_TYPE_ASSOC_REQ

enumerator WIFI_VND_IE_TYPE_ASSOC_RESP

enum wifi_vendor_ie_id_t

Vendor Information Element index.

Each IE type can have up to two associated vendor ID elements.

Values:

enumerator WIFI_VND_IE_ID_0

enumerator WIFI_VND_IE_ID_1

enum wifi_phy_mode_t

Operation Phymode.

Values:

enumerator WIFI_PHY_MODE_LR

PHY mode for Low Rate

enumerator WIFI_PHY_MODE_11B

PHY mode for 11b

enumerator WIFI_PHY_MODE_11G

PHY mode for 11g

enumerator WIFI_PHY_MODE_HT20

PHY mode for Bandwidth HT20

enumerator WIFI_PHY_MODE_HT40

PHY mode for Bandwidth HT40

enumerator WIFI_PHY_MODE_HE20

PHY mode for Bandwidth HE20

enum wifi_promiscuous_pkt_type_t

Promiscuous frame type.

Passed to promiscuous mode RX callback to indicate the type of parameter in the buffer.

Values:

enumerator WIFI_PKT_MGMT

Management frame, indicates ‘buf’ argument is wifi_promiscuous_pkt_t

enumerator WIFI_PKT_CTRL

Control frame, indicates ‘buf’ argument is wifi_promiscuous_pkt_t

enumerator WIFI_PKT_DATA

Data frame, indiciates ‘buf’ argument is wifi_promiscuous_pkt_t

enumerator WIFI_PKT_MISC

Other type, such as MIMO etc. ‘buf’ argument is wifi_promiscuous_pkt_t but the payload is zero length.

enum wifi_ant_mode_t

WiFi antenna mode.

Values:

enumerator WIFI_ANT_MODE_ANT0

Enable WiFi antenna 0 only

enumerator WIFI_ANT_MODE_ANT1

Enable WiFi antenna 1 only

enumerator WIFI_ANT_MODE_AUTO

Enable WiFi antenna 0 and 1, automatically select an antenna

enumerator WIFI_ANT_MODE_MAX

Invalid WiFi enabled antenna

enum wifi_phy_rate_t

WiFi PHY rate encodings.

Values:

enumerator WIFI_PHY_RATE_1M_L

1 Mbps with long preamble

enumerator WIFI_PHY_RATE_2M_L

2 Mbps with long preamble

enumerator WIFI_PHY_RATE_5M_L

5.5 Mbps with long preamble

enumerator WIFI_PHY_RATE_11M_L

11 Mbps with long preamble

enumerator WIFI_PHY_RATE_2M_S

2 Mbps with short preamble

enumerator WIFI_PHY_RATE_5M_S

5.5 Mbps with short preamble

enumerator WIFI_PHY_RATE_11M_S

11 Mbps with short preamble

enumerator WIFI_PHY_RATE_48M

48 Mbps

enumerator WIFI_PHY_RATE_24M

24 Mbps

enumerator WIFI_PHY_RATE_12M

12 Mbps

enumerator WIFI_PHY_RATE_6M

6 Mbps

enumerator WIFI_PHY_RATE_54M

54 Mbps

enumerator WIFI_PHY_RATE_36M

36 Mbps

enumerator WIFI_PHY_RATE_18M

18 Mbps

enumerator WIFI_PHY_RATE_9M

9 Mbps

enumerator WIFI_PHY_RATE_MCS0_LGI

MCS0 with long GI, 6.5 Mbps for 20MHz, 13.5 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS1_LGI

MCS1 with long GI, 13 Mbps for 20MHz, 27 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS2_LGI

MCS2 with long GI, 19.5 Mbps for 20MHz, 40.5 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS3_LGI

MCS3 with long GI, 26 Mbps for 20MHz, 54 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS4_LGI

MCS4 with long GI, 39 Mbps for 20MHz, 81 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS5_LGI

MCS5 with long GI, 52 Mbps for 20MHz, 108 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS6_LGI

MCS6 with long GI, 58.5 Mbps for 20MHz, 121.5 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS7_LGI

MCS7 with long GI, 65 Mbps for 20MHz, 135 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS0_SGI

MCS0 with short GI, 7.2 Mbps for 20MHz, 15 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS1_SGI

MCS1 with short GI, 14.4 Mbps for 20MHz, 30 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS2_SGI

MCS2 with short GI, 21.7 Mbps for 20MHz, 45 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS3_SGI

MCS3 with short GI, 28.9 Mbps for 20MHz, 60 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS4_SGI

MCS4 with short GI, 43.3 Mbps for 20MHz, 90 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS5_SGI

MCS5 with short GI, 57.8 Mbps for 20MHz, 120 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS6_SGI

MCS6 with short GI, 65 Mbps for 20MHz, 135 Mbps for 40MHz

enumerator WIFI_PHY_RATE_MCS7_SGI

MCS7 with short GI, 72.2 Mbps for 20MHz, 150 Mbps for 40MHz

enumerator WIFI_PHY_RATE_LORA_250K

250 Kbps

enumerator WIFI_PHY_RATE_LORA_500K

500 Kbps

enumerator WIFI_PHY_RATE_MAX

enum wifi_event_t

WiFi event declarations

Values:

enumerator WIFI_EVENT_WIFI_READY

ESP32 WiFi ready

enumerator WIFI_EVENT_SCAN_DONE

ESP32 finish scanning AP

enumerator WIFI_EVENT_STA_START

ESP32 station start

enumerator WIFI_EVENT_STA_STOP

ESP32 station stop

enumerator WIFI_EVENT_STA_CONNECTED

ESP32 station connected to AP

enumerator WIFI_EVENT_STA_DISCONNECTED

ESP32 station disconnected from AP

enumerator WIFI_EVENT_STA_AUTHMODE_CHANGE

the auth mode of AP connected by ESP32 station changed

enumerator WIFI_EVENT_STA_WPS_ER_SUCCESS

ESP32 station wps succeeds in enrollee mode

enumerator WIFI_EVENT_STA_WPS_ER_FAILED

ESP32 station wps fails in enrollee mode

enumerator WIFI_EVENT_STA_WPS_ER_TIMEOUT

ESP32 station wps timeout in enrollee mode

enumerator WIFI_EVENT_STA_WPS_ER_PIN

ESP32 station wps pin code in enrollee mode

enumerator WIFI_EVENT_STA_WPS_ER_PBC_OVERLAP

ESP32 station wps overlap in enrollee mode

enumerator WIFI_EVENT_AP_START

ESP32 soft-AP start

enumerator WIFI_EVENT_AP_STOP

ESP32 soft-AP stop

enumerator WIFI_EVENT_AP_STACONNECTED

a station connected to ESP32 soft-AP

enumerator WIFI_EVENT_AP_STADISCONNECTED

a station disconnected from ESP32 soft-AP

enumerator WIFI_EVENT_AP_PROBEREQRECVED

Receive probe request packet in soft-AP interface

enumerator WIFI_EVENT_FTM_REPORT

Receive report of FTM procedure

enumerator WIFI_EVENT_STA_BSS_RSSI_LOW

AP’s RSSI crossed configured threshold

enumerator WIFI_EVENT_ACTION_TX_STATUS

Status indication of Action Tx operation

enumerator WIFI_EVENT_ROC_DONE

Remain-on-Channel operation complete

enumerator WIFI_EVENT_STA_BEACON_TIMEOUT

ESP32 station beacon timeout

enumerator WIFI_EVENT_CONNECTIONLESS_MODULE_WAKE_INTERVAL_START

ESP32 connectionless module wake interval start

enumerator WIFI_EVENT_AP_WPS_RG_SUCCESS

Soft-AP wps succeeds in registrar mode

enumerator WIFI_EVENT_AP_WPS_RG_FAILED

Soft-AP wps fails in registrar mode

enumerator WIFI_EVENT_AP_WPS_RG_TIMEOUT

Soft-AP wps timeout in registrar mode

enumerator WIFI_EVENT_AP_WPS_RG_PIN

Soft-AP wps pin code in registrar mode

enumerator WIFI_EVENT_AP_WPS_RG_PBC_OVERLAP

Soft-AP wps overlap in registrar mode

enumerator WIFI_EVENT_MAX

Invalid WiFi event ID

enum wifi_event_sta_wps_fail_reason_t

Argument structure for WIFI_EVENT_STA_WPS_ER_FAILED event

Values:

enumerator WPS_FAIL_REASON_NORMAL

ESP32 WPS normal fail reason

enumerator WPS_FAIL_REASON_RECV_M2D

ESP32 WPS receive M2D frame

enumerator WPS_FAIL_REASON_RECV_DEAUTH

Recv deauth from AP while wps handshake

enumerator WPS_FAIL_REASON_MAX

enum wifi_ftm_status_t

FTM operation status types.

Values:

enumerator FTM_STATUS_SUCCESS

FTM exchange is successful

enumerator FTM_STATUS_UNSUPPORTED

Peer does not support FTM

enumerator FTM_STATUS_CONF_REJECTED

Peer rejected FTM configuration in FTM Request

enumerator FTM_STATUS_NO_RESPONSE

Peer did not respond to FTM Requests

enumerator FTM_STATUS_FAIL

Unknown error during FTM exchange

enumerator FTM_STATUS_NO_VALID_MSMT

FTM session did not result in any valid measurements

enumerator FTM_STATUS_USER_TERM

User triggered termination

enum wps_fail_reason_t

Values:

enumerator WPS_AP_FAIL_REASON_NORMAL

WPS normal fail reason

enumerator WPS_AP_FAIL_REASON_CONFIG

WPS failed due to incorrect config

enumerator WPS_AP_FAIL_REASON_AUTH

WPS failed during auth

enumerator WPS_AP_FAIL_REASON_MAX

Header File

• components/wpa_supplicant/esp_supplicant/include/esp_eap_client.h

Functions

esp_err_t esp_wifi_sta_enterprise_enable(void)

Enable EAP authentication(WiFi Enterprise) for the station mode.

This function enables Extensible Authentication Protocol (EAP) authentication for the Wi-Fi station mode. When EAP authentication is enabled, the ESP device will attempt to authenticate with the configured EAP credentials when connecting to a secure Wi-Fi network.

Note

Before calling this function, ensure that the Wi-Fi configuration and EAP credentials (such as username and password) have been properly set using the appropriate configuration APIs.

Returns

• ESP_OK: EAP authentication enabled successfully.

• ESP_ERR_NO_MEM: Failed to enable EAP authentication due to memory allocation failure.

esp_err_t esp_wifi_sta_enterprise_disable(void)

Disable EAP authentication(WiFi Enterprise) for the station mode.

This function disables Extensible Authentication Protocol (EAP) authentication for the Wi-Fi station mode. When EAP authentication is disabled, the ESP device will not attempt to authenticate using EAP credentials when connecting to a secure Wi-Fi network.

Note

Disabling EAP authentication may cause the device to connect to the Wi-Fi network using other available authentication methods, if configured using esp_wifi_set_config().

Returns

• ESP_OK: EAP authentication disabled successfully.

• ESP_ERR_INVALID_STATE: EAP client is in an invalid state for disabling.

esp_err_t esp_eap_client_set_identity(const unsigned char *identity, int len)

Set identity for PEAP/TTLS authentication method.

This function sets the identity to be used during PEAP/TTLS authentication.

Parameters

• identity – [in] Pointer to the identity data.

• len – [in] Length of the identity data (limited to 1~127 bytes).

Returns

• ESP_OK: The identity was set successfully.

• ESP_ERR_INVALID_ARG: Invalid argument (len <= 0 or len >= 128).

• ESP_ERR_NO_MEM: Memory allocation failure.

void esp_eap_client_clear_identity(void)

Clear the previously set identity for PEAP/TTLS authentication.

This function clears the identity that was previously set for the EAP client. After calling this function, the EAP client will no longer use the previously configured identity during the authentication process.

esp_err_t esp_eap_client_set_username(const unsigned char *username, int len)

Set username for PEAP/TTLS authentication method.

This function sets the username to be used during PEAP/TTLS authentication.

Parameters

• username – [in] Pointer to the username data.

• len – [in] Length of the username data (limited to 1~127 bytes).

Returns

• ESP_OK: The username was set successfully.

• ESP_ERR_INVALID_ARG: Failed due to an invalid argument (len <= 0 or len >= 128).

• ESP_ERR_NO_MEM: Failed due to memory allocation failure.

void esp_eap_client_clear_username(void)

Clear username for PEAP/TTLS method.

This function clears the previously set username for the EAP client.

esp_err_t esp_eap_client_set_password(const unsigned char *password, int len)

Set password for PEAP/TTLS authentication method.

This function sets the password to be used during PEAP/TTLS authentication.

Parameters

• password – [in] Pointer to the password data.

• len – [in] Length of the password data (len > 0).

Returns

• ESP_OK: The password was set successfully.

• ESP_ERR_INVALID_ARG: Failed due to an invalid argument (len <= 0).

• ESP_ERR_NO_MEM: Failed due to memory allocation failure.

void esp_eap_client_clear_password(void)

Clear password for PEAP/TTLS method.

This function clears the previously set password for the EAP client.

esp_err_t esp_eap_client_set_new_password(const unsigned char *new_password, int len)

Set a new password for MSCHAPv2 authentication method.

This function sets the new password to be used during MSCHAPv2 authentication. The new password is used to substitute the old password when an eap-mschapv2 failure request message with error code ERROR_PASSWD_EXPIRED is received.

Parameters

• new_password – [in] Pointer to the new password data.

• len – [in] Length of the new password data.

Returns

• ESP_OK: The new password was set successfully.

• ESP_ERR_INVALID_ARG: Failed due to an invalid argument (len <= 0).

• ESP_ERR_NO_MEM: Failed due to memory allocation failure.

void esp_eap_client_clear_new_password(void)

Clear new password for MSCHAPv2 method.

This function clears the previously set new password for the EAP client.

esp_err_t esp_eap_client_set_ca_cert(const unsigned char *ca_cert, int ca_cert_len)

Set CA certificate for EAP authentication.

This function sets the Certificate Authority (CA) certificate to be used during EAP authentication. The CA certificate is passed to the EAP client module through a global pointer.

Parameters

• ca_cert – [in] Pointer to the CA certificate data.

• ca_cert_len – [in] Length of the CA certificate data.

Returns

• ESP_OK: The CA certificate was set successfully.

void esp_eap_client_clear_ca_cert(void)

Clear the previously set Certificate Authority (CA) certificate for EAP authentication.

This function clears the CA certificate that was previously set for the EAP client. After calling this function, the EAP client will no longer use the previously configured CA certificate during the authentication process.

esp_err_t esp_eap_client_set_certificate_and_key(const unsigned char *client_cert, int client_cert_len, const unsigned char *private_key, int private_key_len, const unsigned char *private_key_password, int private_key_passwd_len)

Set client certificate and private key for EAP authentication.

This function sets the client certificate and private key to be used during authentication. Optionally, a private key password can be provided for encrypted private keys.

Attention

1. The client certificate, private key, and private key password are provided as pointers to the respective data arrays.

Attention

2. The client_cert, private_key, and private_key_password should be zero-terminated.

Parameters

• client_cert – [in] Pointer to the client certificate data.

• client_cert_len – [in] Length of the client certificate data.

• private_key – [in] Pointer to the private key data.

• private_key_len – [in] Length of the private key data (limited to 1~4096 bytes).

• private_key_password – [in] Pointer to the private key password data (optional).

• private_key_passwd_len – [in] Length of the private key password data (can be 0 for no password).

Returns

• ESP_OK: The certificate, private key, and password (if provided) were set successfully.

void esp_eap_client_clear_certificate_and_key(void)

Clear the previously set client certificate and private key for EAP authentication.

This function clears the client certificate and private key that were previously set for the EAP client. After calling this function, the EAP client will no longer use the previously configured certificate and private key during the authentication process.

esp_err_t esp_eap_client_set_disable_time_check(bool disable)

Set EAP client certificates time check (disable or not).

This function enables or disables the time check for EAP client certificates. When disabled, the certificates’ expiration time will not be checked during the authentication process.

Parameters

disable – [in] True to disable EAP client certificates time check, false to enable it.

Returns

• ESP_OK: The EAP client certificates time check setting was updated successfully.

esp_err_t esp_eap_client_get_disable_time_check(bool *disable)

Get EAP client certificates time check status.

This function retrieves the current status of the EAP client certificates time check.

Parameters

disable – [out] Pointer to a boolean variable to store the disable status.

Returns

• ESP_OK: The status of EAP client certificates time check was retrieved successfully.

esp_err_t esp_eap_client_set_ttls_phase2_method(esp_eap_ttls_phase2_types type)

Set EAP-TTLS phase 2 method.

This function sets the phase 2 method to be used during EAP-TTLS authentication.

Parameters

type – [in] The type of phase 2 method to be used (e.g., EAP, MSCHAPv2, MSCHAP, PAP, CHAP).

Returns

• ESP_OK: The EAP-TTLS phase 2 method was set successfully.

esp_err_t esp_eap_client_set_suiteb_192bit_certification(bool enable)

Enable or disable Suite-B 192-bit certification checks.

This function enables or disables the 192-bit Suite-B certification checks during EAP-TLS authentication. Suite-B is a set of cryptographic algorithms which generally are considered more secure.

Parameters

enable – [in] True to enable 192-bit Suite-B certification checks, false to disable it.

Returns

• ESP_OK: The 192-bit Suite-B certification checks were set successfully.

esp_err_t esp_eap_client_set_pac_file(const unsigned char *pac_file, int pac_file_len)

Set the PAC (Protected Access Credential) file for EAP-FAST authentication.

EAP-FAST requires a PAC file that contains the client’s credentials.

Attention

1. For files read from the file system, length has to be decremented by 1 byte.

Attention

2. Disabling the WPA_MBEDTLS_TLS_CLIENT config is required to use EAP-FAST.

Parameters

• pac_file – [in] Pointer to the PAC file buffer.

• pac_file_len – [in] Length of the PAC file buffer.

Returns

• ESP_OK: The PAC file for EAP-FAST authentication was set successfully.

esp_err_t esp_eap_client_set_fast_params(esp_eap_fast_config config)

Set the parameters for EAP-FAST Phase 1 authentication.

EAP-FAST supports Fast Provisioning, where clients can be authenticated faster using precomputed keys (PAC). This function allows configuring parameters for Fast Provisioning.

Attention

1. Disabling the WPA_MBEDTLS_TLS_CLIENT config is required to use EAP-FAST.

Parameters

config – [in] Configuration structure with Fast Provisioning parameters.

Returns

• ESP_OK: The parameters for EAP-FAST Phase 1 authentication were set successfully.

esp_err_t esp_eap_client_use_default_cert_bundle(bool use_default_bundle)

Use the default certificate bundle for EAP authentication.

By default, the EAP client uses a built-in certificate bundle for server verification. Enabling this option allows the use of the default certificate bundle.

Parameters

use_default_bundle – [in] True to use the default certificate bundle, false to use a custom bundle.

Returns

• ESP_OK: The option to use the default certificate bundle was set successfully.

Structures

struct esp_eap_fast_config

Configuration settings for EAP-FAST (Extensible Authentication Protocol - Flexible Authentication via Secure Tunneling).

This structure defines the configuration options that can be used to customize the behavior of the EAP-FAST authentication protocol, specifically for Fast Provisioning and PAC (Protected Access Credential) handling.

Public Members

int fast_provisioning

Enable or disable Fast Provisioning in EAP-FAST (0 = disabled, 1 = enabled)

int fast_max_pac_list_len

Maximum length of the PAC (Protected Access Credential) list

bool fast_pac_format_binary

Set to true for binary format PAC, false for ASCII format PAC

Enumerations

enum esp_eap_ttls_phase2_types

Enumeration of phase 2 authentication types for EAP-TTLS.

This enumeration defines the supported phase 2 authentication methods that can be used in the EAP-TTLS (Extensible Authentication Protocol - Tunneled Transport Layer Security) protocol for the second authentication phase.

Values:

enumerator ESP_EAP_TTLS_PHASE2_EAP

EAP (Extensible Authentication Protocol)

enumerator ESP_EAP_TTLS_PHASE2_MSCHAPV2

MS-CHAPv2 (Microsoft Challenge Handshake Authentication Protocol - Version 2)

enumerator ESP_EAP_TTLS_PHASE2_MSCHAP

MS-CHAP (Microsoft Challenge Handshake Authentication Protocol)

enumerator ESP_EAP_TTLS_PHASE2_PAP

PAP (Password Authentication Protocol)

enumerator ESP_EAP_TTLS_PHASE2_CHAP

CHAP (Challenge Handshake Authentication Protocol)

Header File

• components/wpa_supplicant/esp_supplicant/include/esp_wps.h

Functions

esp_err_t esp_wifi_wps_enable(const esp_wps_config_t *config)

Enable Wi-Fi WPS function.

Parameters

config – : WPS config to be used in connection

Returns

• ESP_OK : succeed

• ESP_ERR_WIFI_WPS_TYPE : wps type is invalid

• ESP_ERR_WIFI_WPS_MODE : wifi is not in station mode or sniffer mode is on

• ESP_FAIL : wps initialization fails

esp_err_t esp_wifi_wps_disable(void)

Disable Wi-Fi WPS function and release resource it taken.

Returns

• ESP_OK : succeed

• ESP_ERR_WIFI_WPS_MODE : wifi is not in station mode or sniffer mode is on

esp_err_t esp_wifi_wps_start(int timeout_ms)

Start WPS session.

Attention

WPS can only be used when station is enabled. WPS needs to be enabled first for using this API.

Parameters

timeout_ms – : deprecated: This argument’s value will have not effect in functionality of API. The argument will be removed in future. The app should start WPS and register for WIFI events to get the status. WPS status is updated through WPS events. See wifi_event_t enum for more info.

Returns

• ESP_OK : succeed

• ESP_ERR_WIFI_WPS_TYPE : wps type is invalid

• ESP_ERR_WIFI_WPS_MODE : wifi is not in station mode or sniffer mode is on

• ESP_ERR_WIFI_WPS_SM : wps state machine is not initialized

• ESP_FAIL : wps initialization fails

esp_err_t esp_wifi_ap_wps_enable(const esp_wps_config_t *config)

Enable Wi-Fi AP WPS function.

Attention

WPS can only be used when softAP is enabled.

Parameters

config – wps configuration to be used.

Returns

• ESP_OK : succeed

• ESP_ERR_WIFI_WPS_TYPE : wps type is invalid

• ESP_ERR_WIFI_WPS_MODE : wifi is not in station mode or sniffer mode is on

• ESP_FAIL : wps initialization fails

esp_err_t esp_wifi_ap_wps_disable(void)

Disable Wi-Fi SoftAP WPS function and release resource it taken.

Returns

• ESP_OK : succeed

• ESP_ERR_WIFI_WPS_MODE : wifi is not in station mode or sniffer mode is on

esp_err_t esp_wifi_ap_wps_start(const unsigned char *pin)

WPS starts to work.

Attention

WPS can only be used when softAP is enabled.

Parameters

pin – : Pin to be used in case of WPS mode is pin. If Pin is not provided, device will use the pin generated/provided during esp_wifi_ap_wps_enable() and reported in WIFI_EVENT_AP_WPS_RG_PIN

Returns

• ESP_OK : succeed

• ESP_ERR_WIFI_WPS_TYPE : wps type is invalid

• ESP_ERR_WIFI_WPS_MODE : wifi is not in station mode or sniffer mode is on

• ESP_ERR_WIFI_WPS_SM : wps state machine is not initialized

• ESP_FAIL : wps initialization fails

Structures

struct wps_factory_information_t

Structure representing WPS factory information for ESP device.

This structure holds various strings representing factory information for a device, such as the manufacturer, model number, model name, and device name. Each string is a null-terminated character array. If any of the strings are empty, the default values are used.

Public Members

char manufacturer[WPS_MAX_MANUFACTURER_LEN]

Manufacturer of the device. If empty, the default manufacturer is used.

char model_number[WPS_MAX_MODEL_NUMBER_LEN]

Model number of the device. If empty, the default model number is used.

char model_name[WPS_MAX_MODEL_NAME_LEN]

Model name of the device. If empty, the default model name is used.

char device_name[WPS_MAX_DEVICE_NAME_LEN]

Device name. If empty, the default device name is used.

struct esp_wps_config_t

Structure representing configuration settings for WPS (Wi-Fi Protected Setup).

This structure encapsulates various configuration settings for WPS, including the WPS type (PBC or PIN), factory information that will be shown in the WPS Information Element (IE), and a PIN if the WPS type is set to PIN.

Public Members

wps_type_t wps_type

The type of WPS to be used (PBC or PIN).

wps_factory_information_t factory_info

Factory information to be shown in the WPS Information Element (IE). Vendor can choose to display their own information.

char pin[PIN_LEN]

WPS PIN (Personal Identification Number) used when wps_type is set to WPS_TYPE_PIN.

Macros

ESP_ERR_WIFI_REGISTRAR

WPS registrar is not supported

ESP_ERR_WIFI_WPS_TYPE

WPS type error

ESP_ERR_WIFI_WPS_SM

WPS state machine is not initialized

WPS_MAX_MANUFACTURER_LEN

Maximum length of the manufacturer name in WPS information

WPS_MAX_MODEL_NUMBER_LEN

Maximum length of the model number in WPS information

WPS_MAX_MODEL_NAME_LEN

Maximum length of the model name in WPS information

WPS_MAX_DEVICE_NAME_LEN

Maximum length of the device name in WPS information

PIN_LEN

The length of the WPS PIN (Personal Identification Number).

WPS_CONFIG_INIT_DEFAULT(type)

Initialize a default WPS configuration structure with specified WPS type.

This macro initializes a esp_wps_config_t structure with default values for the specified WPS type. It sets the WPS type, factory information (including default manufacturer, model number, model name, and device name), and a default PIN value if applicable.

Parameters

• type – The WPS type to be used (PBC or PIN).

Returns

An initialized esp_wps_config_t structure with the specified WPS type and default values.

Type Definitions

typedef enum wps_type wps_type_t

Enumeration of WPS (Wi-Fi Protected Setup) types.

Enumerations

enum wps_type

Enumeration of WPS (Wi-Fi Protected Setup) types.

Values:

enumerator WPS_TYPE_DISABLE

WPS is disabled

enumerator WPS_TYPE_PBC

WPS Push Button Configuration method

enumerator WPS_TYPE_PIN

WPS PIN (Personal Identification Number) method

enumerator WPS_TYPE_MAX

Maximum value for WPS type enumeration

Header File

• components/wpa_supplicant/esp_supplicant/include/esp_rrm.h

Functions

int esp_rrm_send_neighbor_rep_request(neighbor_rep_request_cb cb, void *cb_ctx)

Send Radio measurement neighbor report request to connected AP.

Parameters

• cb – callback function for neighbor report

• cb_ctx – callback context

Returns

• 0: success

• -1: AP does not support RRM

• -2: station not connected to AP

bool esp_rrm_is_rrm_supported_connection(void)

Check RRM capability of connected AP.

Returns

• true: AP supports RRM

• false: AP does not support RRM or station not connected to AP

Type Definitions

typedef void (*neighbor_rep_request_cb)(void *ctx, const uint8_t *report, size_t report_len)

Callback function type to get neighbor report.

Param ctx

neighbor report context

Param report

neighbor report

Param report_len

neighbor report length

Return

• void

Header File

• components/wpa_supplicant/esp_supplicant/include/esp_wnm.h

Functions

int esp_wnm_send_bss_transition_mgmt_query(enum btm_query_reason query_reason, const char *btm_candidates, int cand_list)

Send bss transition query to connected AP.

Parameters

• query_reason – reason for sending query

• btm_candidates – btm candidates list if available

• cand_list – whether candidate list to be included from scan results available in supplicant’s cache.

Returns

• 0: success

• -1: AP does not support BTM

• -2: station not connected to AP

bool esp_wnm_is_btm_supported_connection(void)

Check bss trasition capability of connected AP.

Returns

• true: AP supports BTM

• false: AP does not support BTM or station not connected to AP

Enumerations

enum btm_query_reason

enum btm_query_reason: Reason code for sending btm query

Values:

enumerator REASON_UNSPECIFIED

enumerator REASON_FRAME_LOSS

enumerator REASON_DELAY

enumerator REASON_BANDWIDTH

enumerator REASON_LOAD_BALANCE

enumerator REASON_RSSI

enumerator REASON_RETRANSMISSIONS

enumerator REASON_INTERFERENCE

enumerator REASON_GRAY_ZONE

enumerator REASON_PREMIUM_AP

Header File

• components/wpa_supplicant/esp_supplicant/include/esp_mbo.h

Functions

int esp_mbo_update_non_pref_chan(struct non_pref_chan_s *non_pref_chan)

Update channel preference for MBO IE.

Parameters

non_pref_chan – Non preference channel list

Returns

• 0: success else failure

Structures

struct non_pref_chan

Structure representing a non-preferred channel in a wireless network.

This structure encapsulates information about a non-preferred channel including the reason for its non-preference, the operating class, channel number, and preference level.

Public Members

enum non_pref_chan_reason reason

Reason for the channel being non-preferred

uint8_t oper_class

Operating class of the channel

uint8_t chan

Channel number

uint8_t preference

Preference level of the channel

struct non_pref_chan_s

Structure representing a list of non-preferred channels in a wireless network.

This structure encapsulates information about a list of non-preferred channels including the number of non-preferred channels and an array of structures representing individual non-preferred channels.

Public Members

size_t non_pref_chan_num

Number of non-preferred channels in the list

struct non_pref_chan chan[]

Array of structures representing individual non-preferred channels

Enumerations

enum non_pref_chan_reason

Enumeration of reasons for a channel being non-preferred in a wireless network.

This enumeration defines various reasons why a specific channel might be considered non-preferred in a wireless network configuration.

Values:

enumerator NON_PREF_CHAN_REASON_UNSPECIFIED

Unspecified reason for non-preference

enumerator NON_PREF_CHAN_REASON_RSSI

Non-preferred due to low RSSI (Received Signal Strength Indication)

enumerator NON_PREF_CHAN_REASON_EXT_INTERFERENCE

Non-preferred due to external interference

enumerator NON_PREF_CHAN_REASON_INT_INTERFERENCE

Non-preferred due to internal interference

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