Wi-Fi¶

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.
Combined AP-STA mode (ESP32 is concurrently an access point and a station connected to another access point).
Various security modes for the above (WPA, WPA2, WEP, 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 are provided in the wifi directory of ESP-IDF examples.

In addition, there is a simple esp-idf-template application to demonstrate a minimal IDF project structure.

API Reference¶

Header File¶

esp_wifi/include/esp_wifi.h

Functions¶

esp_err_t esp_wifi_init(const wifi_init_config_t *config)¶

Init WiFi Alloc resource for WiFi driver, such as WiFi control structure, RX/TX buffer, WiFi NVS structure etc, this WiFi also start 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 init the config to default values, this can guarantee all the fields got correct value when more fields are added into wifi_init_config_t in future release. If you want to set your owner 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!

Return

ESP_OK: succeed
ESP_ERR_NO_MEM: out of memory
others: refer to error code esp_err.h

Parameters

config: pointer to WiFi init configuration structure; can point to a temporary variable.

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

Return

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 soft-AP mode.

Return

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

Parameters

mode: WiFi operating mode

esp_err_t esp_wifi_get_mode(wifi_mode_t *mode)¶

Get current operating mode of WiFi.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

[out] mode: store current WiFi mode

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.

Return

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.

Return

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

Return

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_start_scan() 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. If you want to do reconnection after ESP32 received disconnect event, remember to add the maximum retry time, otherwise the called scan will not work. This is especially true when the AP doesn’t exist, and you still try reconnection after ESP32 received disconnect event with the reason code WIFI_REASON_NO_AP_FOUND.

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
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.

Return

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.

Return

ESP_OK: succeed
others: fail

esp_err_t esp_wifi_deauth_sta(uint16_t aid)¶

deauthenticate all stations or associated id equals to aid

Return

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

Parameters

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

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 the will be freed in esp_wifi_scan_get_ap_records, so generally, call esp_wifi_scan_get_ap_records to cause the memory to be freed 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.

Return

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

Parameters

config: configuration of scanning
block: if block is true, this API will block the caller until the scan is done, otherwise it will return immediately

esp_err_t esp_wifi_scan_stop(void)¶

Stop the scan in process.

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

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.

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
ESP_ERR_INVALID_ARG: invalid argument

Parameters

[out] number: store number of APIs found in last scan

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.

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
ESP_ERR_INVALID_ARG: invalid argument
ESP_ERR_NO_MEM: out of memory

Parameters

[inout] number: 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

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

Return

ESP_OK: succeed
ESP_ERR_WIFI_CONN: The station interface don’t initialized
ESP_ERR_WIFI_NOT_CONNECT: The station is in disconnect status

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

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.

Return

ESP_OK: succeed

Parameters

type: power save type

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.

Return

ESP_OK: succeed

Parameters

[out] type: store current power save type

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

Currently we only support 802.11b or 802.11bg or 802.11bgn mode

Return

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

Parameters

ifx: interfaces
protocol_bitmap: WiFi protocol bitmap

esp_err_t esp_wifi_get_protocol(wifi_interface_t ifx, uint8_t *protocol_bitmap)¶

Get the current protocol bitmap of the specified interface.

Return

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

Parameters

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

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

Return

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

Parameters

ifx: interface to be configured
bw: bandwidth

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

Return

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

Parameters

ifx: interface to be configured
[out] bw: store bandwidth of interface ifx

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()

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

Return

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

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

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

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

primary: store current primary channel
[out] second: store current second channel

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 CHINA {.cc=”CN”, .schan=1, .nchan=13, policy=WIFI_COUNTRY_POLICY_AUTO}

Attention

3. 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=”USA”, .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

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

Attention

5. 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

6. The country configuration is stored into flash.

Attention

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

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

country: the configured country info

esp_err_t esp_wifi_get_country(wifi_country_t *country)¶

get the current country info

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

country: country info

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”.

Return

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

Parameters

ifx: interface
mac: the MAC address

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

Get mac of specified interface.

Return

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

Parameters

ifx: interface
[out] mac: store mac of the interface ifx

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.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

Parameters

cb: callback

esp_err_t esp_wifi_set_promiscuous(bool en)¶

Enable the promiscuous mode.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

Parameters

en: false - disable, true - enable

esp_err_t esp_wifi_get_promiscuous(bool *en)¶

Get the promiscuous mode.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

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

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

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

Parameters

filter: the packet type filtered in promiscuous mode.

esp_err_t esp_wifi_get_promiscuous_filter(wifi_promiscuous_filter_t *filter)¶

Get the promiscuous filter.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

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

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.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

Parameters

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

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.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_ARG: invalid argument

Parameters

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

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.

Return

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 erro code in esp_err.h

Parameters

interface: interface
conf: station or soft-AP configuration

esp_err_t esp_wifi_get_config(wifi_interface_t interface, wifi_config_t *conf)¶

Get configuration of specified interface.

Return

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

Parameters

interface: interface
[out] conf: station or soft-AP configuration

esp_err_t esp_wifi_ap_get_sta_list(wifi_sta_list_t *sta)¶

Get STAs associated with soft-AP.

Attention

SSC only API

Return

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

Parameters

[out] sta: 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

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.

Return

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

Parameters

mac: STA’s mac address
[out] aid: Store the AID corresponding to STA mac

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

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

storage: : storage type

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.

Return

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

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.

esp_err_t esp_wifi_set_vendor_ie_cb(esp_vendor_ie_cb_t cb, void *ctx)¶

Register Vendor-Specific Information Element monitoring callback.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

Parameters

cb: Callback function
ctx: Context argument, passed to callback function.

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}}.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_NOT_START: WiFi is not started by esp_wifi_start
ESP_ERR_WIFI_ARG: invalid argument, e.g. parameter is out of range

Parameters

power: Maximum WiFi transmitting power.

esp_err_t esp_wifi_get_max_tx_power(int8_t *power)¶

Get maximum transmiting power after WiFi start.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_NOT_START: WiFi is not started by esp_wifi_start
ESP_ERR_WIFI_ARG: invalid argument

Parameters

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

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.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

Parameters

mask: WiFi event mask.

esp_err_t esp_wifi_get_event_mask(uint32_t *mask)¶

Get mask of WiFi events.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_ARG: invalid argument

Parameters

mask: WiFi event mask.

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

Return

ESP_OK: success
ESP_ERR_WIFI_IF: Invalid interface
ESP_ERR_INVALID_ARG: Invalid parameter
ESP_ERR_WIFI_NO_MEM: out of memory

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_WIFI_ARG is returned.

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.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

Parameters

cb: callback
ctx: context argument, passed to callback function

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_START: 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_START: 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.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_ARG: Invalid argument, e.g. parameter is NULL, invalid GPIO number etc

Parameters

config: Antenna GPIO configuration.

esp_err_t esp_wifi_get_ant_gpio(wifi_ant_gpio_config_t *config)¶

Get current antenna GPIO configuration.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_ARG: invalid argument, e.g. parameter is NULL

Parameters

config: Antenna GPIO configuration.

esp_err_t esp_wifi_set_ant(const wifi_ant_config_t *config)¶

Set antenna configuration.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_ARG: Invalid argument, e.g. parameter is NULL, invalid antenna mode or invalid GPIO number

Parameters

config: Antenna configuration.

esp_err_t esp_wifi_get_ant(wifi_ant_config_t *config)¶

Get current antenna configuration.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_ARG: invalid argument, e.g. parameter is NULL

Parameters

config: Antenna configuration.

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

Return

0 or the TSF time

Parameters

interface: The interface whose tsf_time is to be retrieved.

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

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

Parameters

ifx: interface to be configured.
sec: Inactive time. Unit seconds.

esp_err_t esp_wifi_get_inactive_time(wifi_interface_t ifx, uint16_t *sec)¶

Get inactive time of specified interface.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_ARG: invalid argument

Parameters

ifx: Interface to be configured.
sec: Inactive time. Unit seconds.

esp_err_t esp_wifi_statis_dump(uint32_t modules)¶

Dump WiFi statistics.

Return

ESP_OK: succeed
others: failed

Parameters

modules: statistic modules to be dumped

esp_err_t esp_wifi_set_rssi_threshold(int32_t rssi)¶

Set RSSI threshold below which APP will get an event.

Attention

This API needs to be called every time after WIFI_EVENT_STA_BSS_RSSI_LOW event is received.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_WIFI_ARG: invalid argument

Parameters

rssi: threshold value in dbm between -100 to 0

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

Use this API only in Station mode

Return

ESP_OK: succeed
others: failed

Parameters

cfg: FTM Initiator session configuration

esp_err_t esp_wifi_ftm_end_session(void)¶

End the ongoing FTM Initiator session.

Attention

This API works only on FTM Initiator

Return

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

Return

ESP_OK: succeed
others: failed

Parameters

offset_cm: T1 Offset to be added in centimeters

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.

Return

ESP_OK: succeed
others: failed

Parameters

ifx: Interface to be configured.
disable: true means disable 11b rate while false means enable 11b rate.

esp_err_t esp_wifi_config_espnow_rate(wifi_interface_t ifx, wifi_phy_rate_t rate)¶

Config ESPNOW rate of specified interface.

Attention

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

Return

ESP_OK: succeed
others: failed

Parameters

ifx: Interface to be configured.
rate: Phy rate to be configured.

esp_err_t esp_wifi_set_connectionless_wake_interval(uint16_t interval)¶

Set interval for station to wake up periodically at disconnected.

Attention

1. Only when ESP_WIFI_STA_DISCONNECTED_PM_ENABLE is enabled, this configuration could work

Attention

2. This configuration only work for station mode and disconnected status

Attention

3. This configuration would influence nothing until some module configure wake_window

Attention

4. A sensible interval which is not too small is recommended (e.g. 100ms)

Parameters

interval: how much micriosecond would the chip wake up, from 1 to 65535.

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 “CN” and ieee80211d_enabled is TRUE.

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

country: the configured country ISO code
ieee80211d_enabled: 802.11d is enabled or not

esp_err_t esp_wifi_get_country_code(char *country)¶

get the current country code

Return

ESP_OK: succeed
ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
ESP_ERR_INVALID_ARG: invalid argument

Parameters

country: country code

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().

Return

ESP_OK: succeed
others: failed

Parameters

ifx: Interface to be configured.
rate: Phy rate to be configured.

Structures¶

struct wifi_init_config_t¶

WiFi stack configuration parameters passed to esp_wifi_init call.

Public Members

system_event_handler_t event_handler¶: WiFi event handler

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 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 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

WIFI_STATIC_TX_BUFFER_NUM¶

WIFI_CACHE_TX_BUFFER_NUM¶

WIFI_DYNAMIC_TX_BUFFER_NUM¶

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¶

CONFIG_FEATURE_WPA3_SAE_BIT¶

CONFIG_FEATURE_CACHE_TX_BUF_BIT¶

CONFIG_FEATURE_FTM_INITIATOR_BIT¶

CONFIG_FEATURE_FTM_RESPONDER_BIT¶

WIFI_INIT_CONFIG_DEFAULT()¶

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.

Parameters

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

Parameters

ctx: Context argument, as passed to esp_wifi_set_vendor_ie_cb() when registering callback.
type: Information element type, based on frame type received.
sa: Source 802.11 address.
vnd_ie: Pointer to the vendor specific element data received.
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.

Parameters

ctx: context argument, passed to esp_wifi_set_csi_rx_cb() when registering callback function.
data: CSI data received. The memory that it points to will be deallocated after callback function returns.

Header File¶

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

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

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

uint32_t phy_11g : 1¶: bit: 1 flag to identify if 11g mode is enabled or not

uint32_t phy_11n : 1¶: bit: 2 flag to identify if 11n mode is enabled or not

uint32_t phy_lr : 1¶: bit: 3 flag to identify if low rate is enabled or not

uint32_t wps : 1¶: bit: 4 flag to identify if WPS is supported or not

uint32_t ftm_responder : 1¶: bit: 5 flag to identify if FTM is supported in responder mode

uint32_t ftm_initiator : 1¶: bit: 6 flag to identify if FTM is supported in initiator mode

uint32_t reserved : 25¶: 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

struct wifi_pmf_config_t¶

Configuration structure for Protected Management Frame

Public Members

bool capable¶: Advertizes support for Protected Management Frame. Device will prefer to 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 ESP32 soft-AP

wifi_auth_mode_t authmode¶: Auth mode of ESP32 soft-AP. Do not support AUTH_WEP in soft-AP mode

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, default 4, max 10

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

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 sort_method 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 advertized in RSN Capabilities in RSN IE.

uint32_t rm_enabled : 1¶: Whether Radio Measurements are enabled for the connection

uint32_t btm_enabled : 1¶: Whether BSS Transition Management is enabled for the connection

uint32_t reserved : 30¶: Reserved for future feature set

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

uint32_t phy_11g : 1¶: bit: 1 flag to identify if 11g mode is enabled or not

uint32_t phy_11n : 1¶: bit: 2 flag to identify if 11n mode is enabled or not

uint32_t phy_lr : 1¶: bit: 3 flag to identify if low rate is enabled or not

uint32_t is_mesh_child : 1¶: bit: 4 flag to identify mesh child

uint32_t reserved : 27¶: 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 : 8¶: Received Signal Strength Indicator(RSSI) of packet. unit: dBm

unsigned rate : 5¶: PHY rate encoding of the packet. Only valid for non HT(11bg) packet

unsigned __pad0__ : 1¶: reserved

unsigned sig_mode : 2¶: 0: non HT(11bg) packet; 1: HT(11n) packet; 3: VHT(11ac) packet

unsigned __pad1__ : 16¶: reserved

unsigned mcs : 7¶: Modulation Coding Scheme. If is HT(11n) packet, shows the modulation, range from 0 to 76(MSC0 ~ MCS76)

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

unsigned __pad2__ : 16¶: reserved

unsigned smoothing : 1¶: reserved

unsigned not_sounding : 1¶: reserved

unsigned __pad3__ : 1¶: reserved

unsigned aggregation : 1¶: Aggregation. 0: MPDU packet; 1: AMPDU packet

unsigned stbc : 2¶: Space Time Block Code(STBC). 0: non STBC packet; 1: STBC packet

unsigned fec_coding : 1¶: Flag is set for 11n packets which are LDPC

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

signed noise_floor : 8¶: noise floor of Radio Frequency Module(RF). unit: 0.25dBm

unsigned ampdu_cnt : 8¶: ampdu cnt

unsigned channel : 4¶: primary channel on which this packet is received

unsigned secondary_channel : 4¶: secondary channel on which this packet is received. 0: none; 1: above; 2: below

unsigned __pad4__ : 8¶: reserved

unsigned timestamp : 32¶: 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 __pad5__ : 32¶: reserved

unsigned __pad6__ : 31¶: reserved

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

unsigned sig_len : 12¶: length of packet including Frame Check Sequence(FCS)

unsigned __pad7__ : 12¶: reserved

unsigned rx_state : 8¶: 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

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

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 : 1¶: Whether this GPIO is connected to external antenna switch

uint8_t gpio_num : 7¶: 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 : 4¶: Index (in antenna GPIO configuration) of enabled WIFI_ANT_MODE_ANT0

uint8_t enabled_ant1 : 4¶: 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 time period between consecutive FTM bursts in 100’s of milliseconds (0 - No pref)

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

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 with multiple entries, should be freed after use

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

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 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.

Parameters

hdr: pointer to the IEEE 802.11 Header structure
payload: pointer to the Payload following 802.11 Header
len: length of the Payload
channel: channel number the frame is received on

Enumerations¶

enum wifi_mode_t¶

Values:

WIFI_MODE_NULL = 0¶: null mode

WIFI_MODE_STA¶: WiFi station mode

WIFI_MODE_AP¶: WiFi soft-AP mode

WIFI_MODE_APSTA¶: WiFi station + soft-AP mode

WIFI_MODE_MAX¶

enum wifi_interface_t¶

Values:

WIFI_IF_STA = ESP_IF_WIFI_STA¶

WIFI_IF_AP = ESP_IF_WIFI_AP¶

enum wifi_country_policy_t¶

Values:

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

WIFI_COUNTRY_POLICY_MANUAL¶: Country policy is manual, always use the configured country info

enum wifi_auth_mode_t¶

Values:

WIFI_AUTH_OPEN = 0¶: authenticate mode : open

WIFI_AUTH_WEP¶: authenticate mode : WEP

WIFI_AUTH_WPA_PSK¶: authenticate mode : WPA_PSK

WIFI_AUTH_WPA2_PSK¶: authenticate mode : WPA2_PSK

WIFI_AUTH_WPA_WPA2_PSK¶: authenticate mode : WPA_WPA2_PSK

WIFI_AUTH_WPA2_ENTERPRISE¶: authenticate mode : WPA2_ENTERPRISE

WIFI_AUTH_WPA3_PSK¶: authenticate mode : WPA3_PSK

WIFI_AUTH_WPA2_WPA3_PSK¶: authenticate mode : WPA2_WPA3_PSK

WIFI_AUTH_WAPI_PSK¶: authenticate mode : WAPI_PSK

WIFI_AUTH_MAX¶

enum wifi_err_reason_t¶

Values:

WIFI_REASON_UNSPECIFIED = 1¶

WIFI_REASON_AUTH_EXPIRE = 2¶

WIFI_REASON_AUTH_LEAVE = 3¶

WIFI_REASON_ASSOC_EXPIRE = 4¶

WIFI_REASON_ASSOC_TOOMANY = 5¶

WIFI_REASON_NOT_AUTHED = 6¶

WIFI_REASON_NOT_ASSOCED = 7¶

WIFI_REASON_ASSOC_LEAVE = 8¶

WIFI_REASON_ASSOC_NOT_AUTHED = 9¶

WIFI_REASON_DISASSOC_PWRCAP_BAD = 10¶

WIFI_REASON_DISASSOC_SUPCHAN_BAD = 11¶

WIFI_REASON_IE_INVALID = 13¶

WIFI_REASON_MIC_FAILURE = 14¶

WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT = 15¶

WIFI_REASON_GROUP_KEY_UPDATE_TIMEOUT = 16¶

WIFI_REASON_IE_IN_4WAY_DIFFERS = 17¶

WIFI_REASON_GROUP_CIPHER_INVALID = 18¶

WIFI_REASON_PAIRWISE_CIPHER_INVALID = 19¶

WIFI_REASON_AKMP_INVALID = 20¶

WIFI_REASON_UNSUPP_RSN_IE_VERSION = 21¶

WIFI_REASON_INVALID_RSN_IE_CAP = 22¶

WIFI_REASON_802_1X_AUTH_FAILED = 23¶

WIFI_REASON_CIPHER_SUITE_REJECTED = 24¶

WIFI_REASON_INVALID_PMKID = 53¶

WIFI_REASON_BEACON_TIMEOUT = 200¶

WIFI_REASON_NO_AP_FOUND = 201¶

WIFI_REASON_AUTH_FAIL = 202¶

WIFI_REASON_ASSOC_FAIL = 203¶

WIFI_REASON_HANDSHAKE_TIMEOUT = 204¶

WIFI_REASON_CONNECTION_FAIL = 205¶

WIFI_REASON_AP_TSF_RESET = 206¶

WIFI_REASON_ROAMING = 207¶

enum wifi_second_chan_t¶

Values:

WIFI_SECOND_CHAN_NONE = 0¶: the channel width is HT20

WIFI_SECOND_CHAN_ABOVE¶: the channel width is HT40 and the secondary channel is above the primary channel

WIFI_SECOND_CHAN_BELOW¶: the channel width is HT40 and the secondary channel is below the primary channel

enum wifi_scan_type_t¶

Values:

WIFI_SCAN_TYPE_ACTIVE = 0¶: active scan

WIFI_SCAN_TYPE_PASSIVE¶: passive scan

enum wifi_cipher_type_t¶

Values:

WIFI_CIPHER_TYPE_NONE = 0¶: the cipher type is none

WIFI_CIPHER_TYPE_WEP40¶: the cipher type is WEP40

WIFI_CIPHER_TYPE_WEP104¶: the cipher type is WEP104

WIFI_CIPHER_TYPE_TKIP¶: the cipher type is TKIP

WIFI_CIPHER_TYPE_CCMP¶: the cipher type is CCMP

WIFI_CIPHER_TYPE_TKIP_CCMP¶: the cipher type is TKIP and CCMP

WIFI_CIPHER_TYPE_AES_CMAC128¶: the cipher type is AES-CMAC-128

WIFI_CIPHER_TYPE_SMS4¶: the cipher type is SMS4

WIFI_CIPHER_TYPE_UNKNOWN¶: the cipher type is unknown

enum wifi_ant_t¶

WiFi antenna.

Values:

WIFI_ANT_ANT0¶: WiFi antenna 0

WIFI_ANT_ANT1¶: WiFi antenna 1

WIFI_ANT_MAX¶: Invalid WiFi antenna

enum wifi_scan_method_t¶

Values:

WIFI_FAST_SCAN = 0¶: Do fast scan, scan will end after find SSID match AP

WIFI_ALL_CHANNEL_SCAN¶: All channel scan, scan will end after scan all the channel

enum wifi_sort_method_t¶

Values:

WIFI_CONNECT_AP_BY_SIGNAL = 0¶: Sort match AP in scan list by RSSI

WIFI_CONNECT_AP_BY_SECURITY¶: Sort match AP in scan list by security mode

enum wifi_ps_type_t¶

Values:

WIFI_PS_NONE¶: No power save

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

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:

WIFI_BW_HT20 = 1¶

WIFI_BW_HT40¶

enum wifi_storage_t¶

Values:

WIFI_STORAGE_FLASH¶: all configuration will store in both memory and flash

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:

WIFI_VND_IE_TYPE_BEACON¶

WIFI_VND_IE_TYPE_PROBE_REQ¶

WIFI_VND_IE_TYPE_PROBE_RESP¶

WIFI_VND_IE_TYPE_ASSOC_REQ¶

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:

WIFI_VND_IE_ID_0¶

WIFI_VND_IE_ID_1¶

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:

WIFI_PKT_MGMT¶: Management frame, indicates ‘buf’ argument is wifi_promiscuous_pkt_t

WIFI_PKT_CTRL¶: Control frame, indicates ‘buf’ argument is wifi_promiscuous_pkt_t

WIFI_PKT_DATA¶: Data frame, indiciates ‘buf’ argument is wifi_promiscuous_pkt_t

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:

WIFI_ANT_MODE_ANT0¶: Enable WiFi antenna 0 only

WIFI_ANT_MODE_ANT1¶: Enable WiFi antenna 1 only

WIFI_ANT_MODE_AUTO¶: Enable WiFi antenna 0 and 1, automatically select an antenna

WIFI_ANT_MODE_MAX¶: Invalid WiFi enabled antenna

enum wifi_phy_rate_t¶

WiFi PHY rate encodings.

Values:

WIFI_PHY_RATE_1M_L = 0x00¶: 1 Mbps with long preamble

WIFI_PHY_RATE_2M_L = 0x01¶: 2 Mbps with long preamble

WIFI_PHY_RATE_5M_L = 0x02¶: 5.5 Mbps with long preamble

WIFI_PHY_RATE_11M_L = 0x03¶: 11 Mbps with long preamble

WIFI_PHY_RATE_2M_S = 0x05¶: 2 Mbps with short preamble

WIFI_PHY_RATE_5M_S = 0x06¶: 5.5 Mbps with short preamble

WIFI_PHY_RATE_11M_S = 0x07¶: 11 Mbps with short preamble

WIFI_PHY_RATE_48M = 0x08¶: 48 Mbps

WIFI_PHY_RATE_24M = 0x09¶: 24 Mbps

WIFI_PHY_RATE_12M = 0x0A¶: 12 Mbps

WIFI_PHY_RATE_6M = 0x0B¶: 6 Mbps

WIFI_PHY_RATE_54M = 0x0C¶: 54 Mbps

WIFI_PHY_RATE_36M = 0x0D¶: 36 Mbps

WIFI_PHY_RATE_18M = 0x0E¶: 18 Mbps

WIFI_PHY_RATE_9M = 0x0F¶: 9 Mbps

WIFI_PHY_RATE_MCS0_LGI = 0x10¶: MCS0 with long GI, 6.5 Mbps for 20MHz, 13.5 Mbps for 40MHz

WIFI_PHY_RATE_MCS1_LGI = 0x11¶: MCS1 with long GI, 13 Mbps for 20MHz, 27 Mbps for 40MHz

WIFI_PHY_RATE_MCS2_LGI = 0x12¶: MCS2 with long GI, 19.5 Mbps for 20MHz, 40.5 Mbps for 40MHz

WIFI_PHY_RATE_MCS3_LGI = 0x13¶: MCS3 with long GI, 26 Mbps for 20MHz, 54 Mbps for 40MHz

WIFI_PHY_RATE_MCS4_LGI = 0x14¶: MCS4 with long GI, 39 Mbps for 20MHz, 81 Mbps for 40MHz

WIFI_PHY_RATE_MCS5_LGI = 0x15¶: MCS5 with long GI, 52 Mbps for 20MHz, 108 Mbps for 40MHz

WIFI_PHY_RATE_MCS6_LGI = 0x16¶: MCS6 with long GI, 58.5 Mbps for 20MHz, 121.5 Mbps for 40MHz

WIFI_PHY_RATE_MCS7_LGI = 0x17¶: MCS7 with long GI, 65 Mbps for 20MHz, 135 Mbps for 40MHz

WIFI_PHY_RATE_MCS0_SGI = 0x18¶: MCS0 with short GI, 7.2 Mbps for 20MHz, 15 Mbps for 40MHz

WIFI_PHY_RATE_MCS1_SGI = 0x19¶: MCS1 with short GI, 14.4 Mbps for 20MHz, 30 Mbps for 40MHz

WIFI_PHY_RATE_MCS2_SGI = 0x1A¶: MCS2 with short GI, 21.7 Mbps for 20MHz, 45 Mbps for 40MHz

WIFI_PHY_RATE_MCS3_SGI = 0x1B¶: MCS3 with short GI, 28.9 Mbps for 20MHz, 60 Mbps for 40MHz

WIFI_PHY_RATE_MCS4_SGI = 0x1C¶: MCS4 with short GI, 43.3 Mbps for 20MHz, 90 Mbps for 40MHz

WIFI_PHY_RATE_MCS5_SGI = 0x1D¶: MCS5 with short GI, 57.8 Mbps for 20MHz, 120 Mbps for 40MHz

WIFI_PHY_RATE_MCS6_SGI = 0x1E¶: MCS6 with short GI, 65 Mbps for 20MHz, 135 Mbps for 40MHz

WIFI_PHY_RATE_MCS7_SGI = 0x1F¶: MCS7 with short GI, 72.2 Mbps for 20MHz, 150 Mbps for 40MHz

WIFI_PHY_RATE_LORA_250K = 0x29¶: 250 Kbps

WIFI_PHY_RATE_LORA_500K = 0x2A¶: 500 Kbps

WIFI_PHY_RATE_MAX¶

enum wifi_event_t¶

WiFi event declarations

Values:

WIFI_EVENT_WIFI_READY = 0¶: ESP32 WiFi ready

WIFI_EVENT_SCAN_DONE¶: ESP32 finish scanning AP

WIFI_EVENT_STA_START¶: ESP32 station start

WIFI_EVENT_STA_STOP¶: ESP32 station stop

WIFI_EVENT_STA_CONNECTED¶: ESP32 station connected to AP

WIFI_EVENT_STA_DISCONNECTED¶: ESP32 station disconnected from AP

WIFI_EVENT_STA_AUTHMODE_CHANGE¶: the auth mode of AP connected by ESP32 station changed

WIFI_EVENT_STA_WPS_ER_SUCCESS¶: ESP32 station wps succeeds in enrollee mode

WIFI_EVENT_STA_WPS_ER_FAILED¶: ESP32 station wps fails in enrollee mode

WIFI_EVENT_STA_WPS_ER_TIMEOUT¶: ESP32 station wps timeout in enrollee mode

WIFI_EVENT_STA_WPS_ER_PIN¶: ESP32 station wps pin code in enrollee mode

WIFI_EVENT_STA_WPS_ER_PBC_OVERLAP¶: ESP32 station wps overlap in enrollee mode

WIFI_EVENT_AP_START¶: ESP32 soft-AP start

WIFI_EVENT_AP_STOP¶: ESP32 soft-AP stop

WIFI_EVENT_AP_STACONNECTED¶: a station connected to ESP32 soft-AP

WIFI_EVENT_AP_STADISCONNECTED¶: a station disconnected from ESP32 soft-AP

WIFI_EVENT_AP_PROBEREQRECVED¶: Receive probe request packet in soft-AP interface

WIFI_EVENT_FTM_REPORT¶: Receive report of FTM procedure

WIFI_EVENT_STA_BSS_RSSI_LOW¶: AP’s RSSI crossed configured threshold

WIFI_EVENT_ACTION_TX_STATUS¶: Status indication of Action Tx operation

WIFI_EVENT_ROC_DONE¶: Remain-on-Channel operation complete

WIFI_EVENT_STA_BEACON_TIMEOUT¶: ESP32 station beacon timeout

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:

WPS_FAIL_REASON_NORMAL = 0¶: ESP32 WPS normal fail reason

WPS_FAIL_REASON_RECV_M2D¶: ESP32 WPS receive M2D frame

WPS_FAIL_REASON_MAX¶

enum wifi_ftm_status_t¶

FTM operation status types.

Values:

FTM_STATUS_SUCCESS = 0¶: FTM exchange is successful

FTM_STATUS_UNSUPPORTED¶: Peer does not support FTM

FTM_STATUS_CONF_REJECTED¶: Peer rejected FTM configuration in FTM Request

FTM_STATUS_NO_RESPONSE¶: Peer did not respond to FTM Requests

FTM_STATUS_FAIL¶: Unknown error during FTM exchange

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