Wi-Fi

Introduction

The WiFi libraries provide support for configuring and monitoring the ESP8266 WiFi networking functionality. This includes configuration for:

  • Station mode (aka STA mode or WiFi client mode). ESP8266 connects to an access point.

  • AP mode (aka Soft-AP mode or Access Point mode). Stations connect to the ESP8266.

  • Combined AP-STA mode (ESP8266 is concurrently an access point and a station connected to another access point).

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

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

  • Promiscuous mode monitoring of IEEE802.11 WiFi packets.

Application Examples

See wifi directory of ESP8266_RTOS_SDK examples that contains the following applications:

  • Simple application showing how to connect ESP8266 module to an Access Point - template.

API Reference

Header File

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_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_get_auto_connect,

  • 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 ESP8266 WiFi station to the AP.

Attention

1. This API only impact WIFI_MODE_STA or WIFI_MODE_APSTA mode

Attention

2. If the ESP8266 is connected to an AP, call esp_wifi_disconnect to disconnect.

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_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 ESP8266 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

  • 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 ESP8266 station is associated with.

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 power save type.

Attention

Default power save type is WIFI_PS_NONE.

Return

ESP_ERR_NOT_SUPPORTED: not supported yet

Parameters

  • type: power save type

esp_err_t esp_wifi_get_ps(wifi_ps_type_t *type)

Get current power save type.

Attention

Default power save type is WIFI_PS_NONE.

Return

ESP_ERR_NOT_SUPPORTED: not supported yet

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)

Attention

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

Attention

Please call this API in SYSTEM_EVENT_STA_START event

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 ESP8266 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 ESP8266 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 ESP8266.

Attention

1. This is a special API for sniffer

Attention

2. This API should be called after esp_wifi_start() or esp_wifi_set_promiscuous()

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 ESP8266.

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. The default country is {.cc=”CN”, .schan=1, .nchan=13, policy=WIFI_COUNTRY_POLICY_AUTO}

Attention

2. 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 back to the country info of the station automatically, {.cc=”USA”, .schan=1, .nchan=11} in the example.

Attention

3. When the country policy is WIFI_COUNTRY_POLICY_MANUAL, always use the configured country info.

Attention

4. 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 changed also.

Attention

5. The country configuration is not stored into flash

Attention

6. This API doesn’t validate the per-country rules, it’s up to the user to fill in all fields according to local regulations.

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 ESP8266 WiFi station or the soft-AP interface.

Attention

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

Attention

2. ESP8266 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 ESP8266 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_config(wifi_interface_t interface, wifi_config_t *conf)

Set the configuration of the ESP8266 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. ESP8266 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 ESP8266 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_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_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_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_auto_connect(bool en)

Set auto connect The default value is true.

Return

  • ESP_OK: succeed

  • ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init

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

  • others: refer to error code in esp_err.h

Parameters

  • en: : true - enable auto connect / false - disable auto connect

esp_err_t esp_wifi_get_auto_connect(bool *en)

Get the auto connect flag.

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 current auto connect configuration

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 WiFi transmiting power.

Attention

Please Call this API after calling esp_wifi_start()

Attention

WiFi transmiting power is divided to six levels in phy init data. Level0 represents highest transmiting power and level5 represents lowest transmiting power. Packets of different rates are transmitted in different powers according to the configuration in phy init data. This API only sets maximum WiFi transmiting power. If this API is called, the transmiting power of every packet will be less than or equal to the value set by this API. If this API is not called, the value of maximum transmitting power set in phy_init_data.bin or menuconfig (depend on whether to use phy init data in partition or not) will be used. Default value is level0. Values passed in power are mapped to transmit power levels as follows:

  • [82, 127]: level0

  • [78, 81]: level1

  • [74, 77]: level2

  • [68, 73]: level3

  • [64, 67]: level4

  • [56, 63]: level5

  • [49, 55]: level5 - 2dBm

  • [33, 48]: level5 - 6dBm

  • [25, 32]: level5 - 8dBm

  • [13, 24]: level5 - 11dBm

  • [ 1, 12]: level5 - 14dBm

  • [-128, 0]: level5 - 17.5dBm

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

Parameters

  • power: Maximum WiFi transmiting power.

void esp_wifi_set_max_tx_power_via_vdd33(uint16_t vdd33)

Adjust RF Tx Power according to VDD33; unit : 1/1024 V.

Attention

When TOUT pin is suspended, VDD33 can be got by esp_wifi_get_vdd33. When TOUT pin is wired to external circuitry, esp_wifi_get_vdd33 can not be used.

Attention

This api only worked when it is called, please call this api every day or hour according to power consumption.

Parameters

  • vdd33: unit is 1/1024V, range [1900, 3300].

uint16_t esp_wifi_get_vdd33(void)

Measure the power voltage of VDD3P3 pin 3 and 4; unit: 1/1024 V.

Attention

esp_wifi_get_vdd33 can only be called when TOUT pin is suspended.

Attention

The 107th byte in esp_init_data_default.bin (0 ~ 127 bytes) is named as vdd33_const. When TOUT pin is suspended, vdd33_const must be set as 0xFF, which is 255.

Attention

The return value of esp_wifi_get_vdd33 may be different in different Wi-Fi modes, for example, in Modem-sleep mode or in normal Wi-Fi working mode.

Return

the power voltage of vdd33 pin 3 and 4

esp_err_t esp_wifi_get_max_tx_power(int8_t *power)

Get maximum WiFi transmiting power.

Attention

This API gets maximum WiFi transmiting power. Values got from power are mapped to transmit power levels as follows:

  • 78: 19.5dBm

  • 76: 19dBm

  • 74: 18.5dBm

  • 68: 17dBm

  • 60: 15dBm

  • 52: 13dBm

  • 44: 11dBm

  • 34: 8.5dBm

  • 28: 7dBm

  • 20: 5dBm

  • 8: 2dBm

  • -4: -1dBm

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_INVALID_ARG: invalid argument

Parameters

  • power: Maximum WiFi transmiting power.

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 user-define 802.11 packets.

Attention

1. Packet has to be the whole 802.11 packet, does not include the FCS. The length of the packet has to be longer than the minimum length of the header of 802.11 packet which is 24 bytes, and less than 1400 bytes.

Attention

2. Duration area is invalid for user, it will be filled in SDK.

Attention

3. The rate of sending packet is same as the management packet which is the same as the system rate of sending packets.

Attention

4. Only after the previous packet was sent, entered the sent callback, the next packet is allowed to send. Otherwise, wifi_send_pkt_freedom will return fail.

Return

ESP_OK, succeed;

Return

ESP_FAIL, fail.

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: pointer of packet

  • len: packet length

  • en_sys_seq: follow the system’s 802.11 packets sequence number or not, if it is true, the sequence number will be increased 1 every time a packet sent.

wifi_state_t esp_wifi_get_state(void)

Operation system start check time and enter sleep.

Note

This function is called by system, user should not call this

Return

  • wifi state

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

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.

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

void *osi_funcs

WiFi OS functions

uint8_t qos_enable

WiFi QOS feature enable flag

uint8_t ampdu_rx_enable

WiFi AMPDU RX feature enable flag

uint8_t rx_ba_win

WiFi Block Ack RX window size

uint8_t rx_ampdu_buf_num

WiFi AMPDU RX buffer number

uint32_t rx_ampdu_buf_len

WiFi AMPDU RX buffer length

uint32_t rx_max_single_pkt_len

WiFi RX max single packet size

uint32_t rx_buf_len

WiFi RX buffer size

uint8_t amsdu_rx_enable

WiFi AMSDU RX feature enable flag

uint8_t rx_buf_num

WiFi RX buffer number

uint8_t rx_pkt_num

WiFi RX packet number

uint8_t left_continuous_rx_buf_num

WiFi Rx left continuous rx buffer number

uint8_t tx_buf_num

WiFi TX buffer number

uint8_t nvs_enable

WiFi NVS flash enable flag

uint8_t nano_enable

Nano option for printf/scan family enable flag

uint8_t wpa3_sae_enable

WiFi WPA3 feature enable flag

uint32_t 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_PM_MODE_OPEN

Wifi is in min/max modem sleep mode

ESP_ERR_WIFI_FPM_MODE

Have not enable fpm mode

ESP_WIFI_PARAM_USE_NVS
WIFI_AMPDU_RX_ENABLED
WIFI_AMPDU_RX_BA_WIN
WIFI_RX_MAX_SINGLE_PKT_LEN
WIFI_AMPDU_RX_AMPDU_BUF_LEN
WIFI_AMPDU_RX_AMPDU_BUF_NUM
WIFI_HW_RX_BUFFER_LEN
WIFI_QOS_ENABLED
WIFI_AMSDU_RX_ENABLED
WIFI_NVS_ENABLED
WIFI_WPA3_ENABLED
WIFI_INIT_CONFIG_MAGIC
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

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.

Header File

Unions

union wifi_scan_time_t
#include <esp_wifi_types.h>

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.

union wifi_config_t
#include <esp_wifi_types.h>

Configuration data for ESP8266 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

maximum tx 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_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

int16_t freq_offset

frequency offset 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 reserved : 27

bit: 5..31 reserved

wifi_country_t country

country information of AP

struct wifi_fast_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 esp_pm_config_t

Wi-Fi Power management config for ESP8266.

Pass a pointer to this structure as an argument to esp_wifi_set_pm_config function.

Public Members

uint8_t max_bcn_early_ms

max beacon early time(2~15ms), default 4ms.

uint8_t max_bcn_timeout_ms

max beacon timeout time(12~32ms), default 24ms.

uint8_t wait_time

wait time before close RF (10~100ms), default 20ms.

uint8_t wait_tx_cnt

wait cnt after tx packet done(1~20), default 2, real time = wait_tx_cnt * wait_time.

uint8_t wait_rx_bdata_cnt

wait cnt after rx broadcast packet(1~100), default 2, real time = wait_tx_cnt * wait_time.

uint8_t wait_rx_udata_cnt

wait cnt after rx unicast packet(1~100), default 4, real time = wait_tx_cnt * wait_time.

bool recv_bdata

Receive broadcast/multicast packet or not when WiFi in power save. default true(receive broadcast/multicast packet)

struct esp_pm_config_esp8266_t

Power management config for ESP8266.

Pass a pointer to this structure as an argument to esp_pm_configure function.

Public Members

int max_freq_mhz

Not used in ESP8266

int min_freq_mhz

Not used in ESP8266

bool light_sleep_enable

Enter light sleep when no locks are taken

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 ESP8266.

Public Members

uint8_t ssid[32]

SSID of ESP8266 soft-AP

uint8_t password[64]

Password of ESP8266 soft-AP

uint8_t ssid_len

Length of SSID. If softap_config.ssid_len==0, check the SSID until there is a termination character; otherwise, set the SSID length according to softap_config.ssid_len.

uint8_t channel

Channel of ESP8266 soft-AP

wifi_auth_mode_t authmode

Auth mode of ESP8266 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 4

uint16_t beacon_interval

Beacon interval, 100 ~ 60000 ms, default 100 ms

struct wifi_sta_config_t

STA configuration settings for the ESP8266.

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 ESP8266 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_fast_scan_threshold_t threshold

When scan_method is set to WIFI_FAST_SCAN, 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 BTM 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

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 reserved : 28

bit: 4..31 reserved

struct wifi_sta_list_t

List of stations associated with the ESP8266 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

signal intensity of packet

unsigned rate : 4

data rate

unsigned is_group : 1

usually not used

unsigned __pad0__ : 1

reserve

unsigned sig_mode : 2

0:is not 11n packet; 1:is 11n packet

unsigned legacy_length : 12

Length of 11bg mode packet

unsigned damatch0 : 1

usually not used

unsigned damatch1 : 1

usually not used

unsigned bssidmatch0 : 1

usually not used

unsigned bssidmatch1 : 1

usually not used

unsigned mcs : 7

if is 11n packet, shows the modulation(range from 0 to 76)

unsigned cwb : 1

if is 11n packet, shows if is HT40 packet or not

unsigned HT_length : 16

Length of 11n mode packet

unsigned smoothing : 1

reserve

unsigned not_sounding : 1

reserve

unsigned __pad1__ : 1

reserve

unsigned aggregation : 1

Aggregation

unsigned stbc : 2

STBC

unsigned fec_coding : 1

Flag is set for 11n packets which are LDPC

unsigned sgi : 1

SGI

unsigned rxend_state : 8

usually not used

unsigned ampdu_cnt : 8

ampdu cnt

unsigned channel : 4

which channel this packet in

unsigned __pad2__ : 4

reserve

signed noise_floor : 8

usually not used

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 frame payload. Length of payload is min(112, (pkt->rx_ctrl.sig_mode ? pkt->rx_ctrl.HT_length : pkt->rx_ctrl.legacy_length)) 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_tx_status_t

WIFI hardware TX status.

Public Members

unsigned wifi_tx_result : 8

TX status code, descripted by “wifi_tx_result_t”

unsigned wifi_tx_src : 6

TX status SRC

unsigned wifi_tx_lrc : 6

TX status LRC

unsigned wifi_tx_rate : 8

TX rate, descripted by “wifi_tx_rate_t”

unsigned unused : 4

Resolved

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_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_ap_staconnected_t

Argument structure for WIFI_EVENT_AP_STACONNECTED event

Public Members

uint8_t mac[6]

MAC address of the station connected to soft-AP

uint8_t aid

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

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 soft-AP

uint8_t aid

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

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_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_bss_rssi_low_t

Argument structure for WIFI_EVENT_STA_BSS_RSSI_LOW event

Public Members

int32_t rssi

RSSI value of bss

Macros

WIFI_IF_STA
WIFI_IF_AP
WIFI_PS_MODEM

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 ESP8266 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_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

Type Definitions

typedef esp_interface_t wifi_interface_t

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_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_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_BASIC_RATE_NOT_SUPPORT = 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 second channel is above the primary channel

WIFI_SECOND_CHAN_BELOW

the channel width is HT40 and the second 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_UNKNOWN

the cipher type is unknown

enum wifi_ant_t

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_state_t

Values:

WIFI_STATE_DEINIT = 0
WIFI_STATE_INIT
WIFI_STATE_START
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. Attention: Using this option may cause ping failures. Not recommended

enum wifi_bandwidth_t

Values:

WIFI_BW_HT20 = 1
WIFI_BW_HT40
enum wifi_storage_t

Values:

WIFI_STORAGE_FLASH

all configuration will strore 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_tx_result_t

WIFI hardware TX result code.

Values:

TX_STATUS_SUCCESS = 1
TX_STATUS_SRC_EXCEED
TX_STATUS_LRC_EXCEED
TX_STATUS_DISCARD
enum wifi_tx_rate_t

WIFI hardware TX rate.

Values:

PHY_RATE_1_LONG
PHY_RATE_2_LONG
PHY_RATE_5_LONG
PHY_RATE_11_LONG
PHY_RATE_RESERVED
PHY_RATE_2_SHORT
PHY_RATE_5_SHORT
PHY_RATE_11_SHORT
PHY_RATE_48
PHY_RATE_24
PHY_RATE_12
PHY_RATE_6
PHY_RATE_54
PHY_RATE_36
PHY_RATE_18
PHY_RATE_9
enum wifi_event_t

WiFi event declarations

Values:

WIFI_EVENT_WIFI_READY = 0

WiFi ready

WIFI_EVENT_SCAN_DONE

finish scanning AP

WIFI_EVENT_STA_START

station start

WIFI_EVENT_STA_STOP

station stop

WIFI_EVENT_STA_CONNECTED

station connected to AP

WIFI_EVENT_STA_DISCONNECTED

station disconnected from AP

WIFI_EVENT_STA_AUTHMODE_CHANGE

the auth mode of AP connected by station changed

WIFI_EVENT_STA_BSS_RSSI_LOW

AP’s RSSI crossed configured threshold

WIFI_EVENT_STA_WPS_ER_SUCCESS

station wps succeeds in enrollee mode

WIFI_EVENT_STA_WPS_ER_FAILED

station wps fails in enrollee mode

WIFI_EVENT_STA_WPS_ER_TIMEOUT

station wps timeout in enrollee mode

WIFI_EVENT_STA_WPS_ER_PIN

station wps pin code in enrollee mode

WIFI_EVENT_AP_START

soft-AP start

WIFI_EVENT_AP_STOP

soft-AP stop

WIFI_EVENT_AP_STACONNECTED

a station connected to soft-AP

WIFI_EVENT_AP_STADISCONNECTED

a station disconnected from soft-AP

WIFI_EVENT_AP_PROBEREQRECVED

Receive probe request packet in soft-AP interface

enum wifi_event_sta_wps_fail_reason_t

Argument structure for WIFI_EVENT_STA_WPS_ER_FAILED event

Values:

WPS_FAIL_REASON_NORMAL = 0

WPS normal fail reason

WPS_FAIL_REASON_RECV_M2D

WPS receive M2D frame

WPS_FAIL_REASON_MAX