Wi-Fi

[中文]

Introduction

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

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

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

  • Station/AP-coexistence mode (ESP32 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

Several application examples demonstrating the functionality of Wi-Fi library are provided in wifi directory of ESP-IDF repository. Please check the README for more details.

API Reference

Header File

  • components/esp_wifi/include/esp_wifi.h

  • This header file can be included with:

    #include "esp_wifi.h"
    
  • This header file is a part of the API provided by the esp_wifi component. To declare that your component depends on esp_wifi, add the following to your CMakeLists.txt:

    REQUIRES esp_wifi
    

    or

    PRIV_REQUIRES esp_wifi
    

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, station+soft-AP or NAN.
       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 creates station control block and starts station If mode is WIFI_MODE_AP, it creates soft-AP control block and starts soft-AP If mode is WIFI_MODE_APSTA, it creates soft-AP and station control block and starts soft-AP and station If mode is WIFI_MODE_NAN, it creates NAN control block and starts NAN.

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 stops station and frees station control block If mode is WIFI_MODE_AP, it stops soft-AP and frees soft-AP control block If mode is WIFI_MODE_APSTA, it stops station/soft-AP and frees station/soft-AP control block If mode is WIFI_MODE_NAN, it stops NAN and frees NAN 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 WiFi station to the AP.

Attention

1. This API only impact WIFI_MODE_STA or WIFI_MODE_APSTA mode

Attention

2. If station interface 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 device and the AP is established. If device is scanning and connecting at the same time, it 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 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 milliseconds, scan_time.passive:360 milliseconds

  • 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 to which the device 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). if CONFIG_SOC_WIFI_HE_SUPPORT, the default protocol is (WIFI_PROTOCOL_11B|WIFI_PROTOCOL_11G|WIFI_PROTOCOL_11N|WIFI_PROTOCOL_11AX).

Attention

Support 802.11b or 802.11bg or 802.11bgn or 802.11bgnax 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 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 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 device.

Attention

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

Attention

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

Attention

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

Attention

4. When device 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 remember 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 device.

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 WiFi station, soft-AP or NAN interface.

Attention

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

Attention

2. Above mentioned interfaces have different MAC addresses, do not set them to be the same.

Attention

3. The bit 0 of the first byte of 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 STA, AP or NAN.

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. ESP devices are 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 station.

Attention

4. The configuration will be stored in NVS for station and soft-AP

Parameters
  • interface -- interface

  • conf -- station, soft-AP or NAN 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 transmitting 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 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 after 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_set_dynamic_cs(bool enabled)

Config dynamic carrier sense.

Attention

This API should be called after esp_wifi_start().

Parameters

enabled -- Dynamic carrier sense is enabled or not.

Returns

  • ESP_OK: succeed

  • others: failed

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_TWT_FULL

no available flow id

ESP_ERR_WIFI_TWT_SETUP_TIMEOUT

Timeout of receiving twt setup response frame, timeout times can be set during twt setup

ESP_ERR_WIFI_TWT_SETUP_TXFAIL

TWT setup frame tx failed

ESP_ERR_WIFI_TWT_SETUP_REJECT

The twt setup request was rejected by the AP

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
CONFIG_FEATURE_WPA3_SAE_BIT
CONFIG_FEATURE_CACHE_TX_BUF_BIT
CONFIG_FEATURE_FTM_INITIATOR_BIT
CONFIG_FEATURE_FTM_RESPONDER_BIT
WIFI_FEATURE_CAPS
WIFI_INIT_CONFIG_DEFAULT()
ESP_WIFI_CONNECTIONLESS_INTERVAL_DEFAULT_MODE

Type Definitions

typedef struct wifi_osi_funcs_t wifi_osi_funcs_t
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 struct wifi_sta_list_t wifi_sta_list_t

Forward declare wifi_sta_list_t. The definition depends on the target device that implements esp_wifi.

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

  • This header file can be included with:

    #include "esp_wifi_types.h"
    
  • This header file is a part of the API provided by the esp_wifi component. To declare that your component depends on esp_wifi, add the following to your CMakeLists.txt:

    REQUIRES esp_wifi
    

    or

    PRIV_REQUIRES esp_wifi
    

Type Definitions

typedef struct wifi_csi_config_t wifi_csi_config_t
typedef struct wifi_pkt_rx_ctrl_t wifi_pkt_rx_ctrl_t

Header File

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

  • This header file can be included with:

    #include "esp_eap_client.h"
    
  • This header file is a part of the API provided by the wpa_supplicant component. To declare that your component depends on wpa_supplicant, add the following to your CMakeLists.txt:

    REQUIRES wpa_supplicant
    

    or

    PRIV_REQUIRES wpa_supplicant
    

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 ESP_WIFI_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 ESP_WIFI_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

  • This header file can be included with:

    #include "esp_wps.h"
    
  • This header file is a part of the API provided by the wpa_supplicant component. To declare that your component depends on wpa_supplicant, add the following to your CMakeLists.txt:

    REQUIRES wpa_supplicant
    

    or

    PRIV_REQUIRES wpa_supplicant
    

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

  • This header file can be included with:

    #include "esp_rrm.h"
    
  • This header file is a part of the API provided by the wpa_supplicant component. To declare that your component depends on wpa_supplicant, add the following to your CMakeLists.txt:

    REQUIRES wpa_supplicant
    

    or

    PRIV_REQUIRES wpa_supplicant
    

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.

Deprecated:

This function is deprecated and will be removed in the future. Please use 'esp_rrm_send_neighbor_report_request'

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

int esp_rrm_send_neighbor_report_request(void)

Send Radio measurement neighbor report request to connected AP.

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

  • This header file can be included with:

    #include "esp_wnm.h"
    
  • This header file is a part of the API provided by the wpa_supplicant component. To declare that your component depends on wpa_supplicant, add the following to your CMakeLists.txt:

    REQUIRES wpa_supplicant
    

    or

    PRIV_REQUIRES wpa_supplicant
    

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

  • This header file can be included with:

    #include "esp_mbo.h"
    
  • This header file is a part of the API provided by the wpa_supplicant component. To declare that your component depends on wpa_supplicant, add the following to your CMakeLists.txt:

    REQUIRES wpa_supplicant
    

    or

    PRIV_REQUIRES wpa_supplicant
    

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