Legacy event loop¶

API Reference¶

Header File¶

esp_event/include/esp_event_legacy.h

Functions¶

esp_err_t esp_event_send(system_event_t *event)¶

Send a event to event task.

Other task/modules, such as the tcpip_adapter, can call this API to send an event to event task

Note: This API is part of the legacy event system. New code should use event library API in esp_event.h

Return

ESP_OK : succeed

Return

others : fail

Parameters

event: Event to send

esp_err_t esp_event_send_internal(esp_event_base_t event_base, int32_t event_id, void *event_data, size_t event_data_size, TickType_t ticks_to_wait)¶

Send a event to event task.

Other task/modules, such as the tcpip_adapter, can call this API to send an event to event task

Note: This API is used by WiFi Driver only.

Return

ESP_OK : succeed

Return

others : fail

Parameters

[in] event_base: the event base that identifies the event
[in] event_id: the event id that identifies the event
[in] event_data: the data, specific to the event occurence, that gets passed to the handler
[in] event_data_size: the size of the event data
[in] ticks_to_wait: number of ticks to block on a full event queue

esp_err_t esp_event_process_default(system_event_t *event)¶

Default event handler for system events.

This function performs default handling of system events. When using esp_event_loop APIs, it is called automatically before invoking the user-provided callback function.

Note: This API is part of the legacy event system. New code should use event library API in esp_event.h

Applications which implement a custom event loop must call this function as part of event processing.

Return

ESP_OK if an event was handled successfully

Parameters

event: pointer to event to be handled

void esp_event_set_default_eth_handlers(void)¶

Install default event handlers for Ethernet interface.

Note: This API is part of the legacy event system. New code should use event library API in esp_event.h

void esp_event_set_default_wifi_handlers(void)¶

Install default event handlers for Wi-Fi interfaces (station and AP)

Note: This API is part of the legacy event system. New code should use event library API in esp_event.h

esp_err_t esp_event_loop_init(system_event_cb_t cb, void *ctx)¶

Initialize event loop.

Create the event handler and task

Note: This API is part of the legacy event system. New code should use event library API in esp_event.h

Return

ESP_OK: succeed
others: fail

Parameters

cb: application specified event callback, it can be modified by call esp_event_set_cb
ctx: reserved for user

system_event_cb_t esp_event_loop_set_cb(system_event_cb_t cb, void *ctx)¶

Set application specified event callback function.

Note

This API is part of the legacy event system. New code should use event library API in esp_event.h

Attention

1. If cb is NULL, means application don’t need to handle If cb is not NULL, it will be call when an event is received, after the default event callback is completed

Return

old callback

Parameters

cb: application callback function
ctx: argument to be passed to callback

Unions¶

union system_event_info_t¶

#include <esp_event_legacy.h>

Union of all possible system_event argument structures

Public Members

system_event_sta_connected_t connected¶: ESP32 station connected to AP

system_event_sta_disconnected_t disconnected¶: ESP32 station disconnected to AP

system_event_sta_scan_done_t scan_done¶: ESP32 station scan (APs) done

system_event_sta_authmode_change_t auth_change¶: the auth mode of AP ESP32 station connected to changed

system_event_sta_got_ip_t got_ip¶: ESP32 station got IP, first time got IP or when IP is changed

system_event_sta_wps_er_pin_t sta_er_pin¶: ESP32 station WPS enrollee mode PIN code received

system_event_sta_wps_fail_reason_t sta_er_fail_reason¶: ESP32 station WPS enrollee mode failed reason code received

system_event_sta_wps_er_success_t sta_er_success¶: ESP32 station WPS enrollee success

system_event_ap_staconnected_t sta_connected¶: a station connected to ESP32 soft-AP

system_event_ap_stadisconnected_t sta_disconnected¶: a station disconnected to ESP32 soft-AP

system_event_ap_probe_req_rx_t ap_probereqrecved¶: ESP32 soft-AP receive probe request packet

system_event_ap_staipassigned_t ap_staipassigned¶: ESP32 soft-AP assign an IP to the station

system_event_got_ip6_t got_ip6¶: ESP32 station　or ap or ethernet ipv6 addr state change to preferred

Structures¶

struct system_event_t¶

Event, as a tagged enum

Public Members

system_event_id_t event_id¶: event ID

system_event_info_t event_info¶: event information

Macros¶

SYSTEM_EVENT_AP_STA_GOT_IP6¶

Type Definitions¶

typedef wifi_event_sta_wps_fail_reason_t system_event_sta_wps_fail_reason_t¶: Argument structure of SYSTEM_EVENT_STA_WPS_ER_FAILED event

typedef wifi_event_sta_scan_done_t system_event_sta_scan_done_t¶: Argument structure of SYSTEM_EVENT_SCAN_DONE event

typedef wifi_event_sta_connected_t system_event_sta_connected_t¶: Argument structure of SYSTEM_EVENT_STA_CONNECTED event

typedef wifi_event_sta_disconnected_t system_event_sta_disconnected_t¶: Argument structure of SYSTEM_EVENT_STA_DISCONNECTED event

typedef wifi_event_sta_authmode_change_t system_event_sta_authmode_change_t¶: Argument structure of SYSTEM_EVENT_STA_AUTHMODE_CHANGE event

typedef wifi_event_sta_wps_er_pin_t system_event_sta_wps_er_pin_t¶: Argument structure of SYSTEM_EVENT_STA_WPS_ER_PIN event

typedef wifi_event_sta_wps_er_success_t system_event_sta_wps_er_success_t¶: Argument structure of SYSTEM_EVENT_STA_WPS_ER_PIN event

typedef wifi_event_ap_staconnected_t system_event_ap_staconnected_t¶: Argument structure of event

typedef wifi_event_ap_stadisconnected_t system_event_ap_stadisconnected_t¶: Argument structure of event

typedef wifi_event_ap_probe_req_rx_t system_event_ap_probe_req_rx_t¶: Argument structure of event

typedef ip_event_ap_staipassigned_t system_event_ap_staipassigned_t¶: Argument structure of event

typedef ip_event_got_ip_t system_event_sta_got_ip_t¶: Argument structure of event

typedef ip_event_got_ip6_t system_event_got_ip6_t¶: Argument structure of event

typedef esp_err_t (*system_event_handler_t)(esp_event_base_t event_base, int32_t event_id, void *event_data, size_t event_data_size, TickType_t ticks_to_wait)¶: Event handler function type

typedef esp_err_t (*system_event_cb_t)(void *ctx, system_event_t *event)¶

Application specified event callback function.

Note

This API is part of the legacy event system. New code should use event library API in esp_event.h

Return

ESP_OK: succeed
others: fail

Parameters

ctx: reserved for user
event: event type defined in this file

Enumerations¶

enum system_event_id_t¶

System event types enumeration

Values:

SYSTEM_EVENT_WIFI_READY = 0¶: ESP32 WiFi ready

SYSTEM_EVENT_SCAN_DONE¶: ESP32 finish scanning AP

SYSTEM_EVENT_STA_START¶: ESP32 station start

SYSTEM_EVENT_STA_STOP¶: ESP32 station stop

SYSTEM_EVENT_STA_CONNECTED¶: ESP32 station connected to AP

SYSTEM_EVENT_STA_DISCONNECTED¶: ESP32 station disconnected from AP

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

SYSTEM_EVENT_STA_GOT_IP¶: ESP32 station got IP from connected AP

SYSTEM_EVENT_STA_LOST_IP¶: ESP32 station lost IP and the IP is reset to 0

SYSTEM_EVENT_STA_BEACON_TIMEOUT¶: ESP32 station beacon timeout

SYSTEM_EVENT_STA_WPS_ER_SUCCESS¶: ESP32 station wps succeeds in enrollee mode

SYSTEM_EVENT_STA_WPS_ER_FAILED¶: ESP32 station wps fails in enrollee mode

SYSTEM_EVENT_STA_WPS_ER_TIMEOUT¶: ESP32 station wps timeout in enrollee mode

SYSTEM_EVENT_STA_WPS_ER_PIN¶: ESP32 station wps pin code in enrollee mode

SYSTEM_EVENT_STA_WPS_ER_PBC_OVERLAP¶: ESP32 station wps overlap in enrollee mode

SYSTEM_EVENT_AP_START¶: ESP32 soft-AP start

SYSTEM_EVENT_AP_STOP¶: ESP32 soft-AP stop

SYSTEM_EVENT_AP_STACONNECTED¶: a station connected to ESP32 soft-AP

SYSTEM_EVENT_AP_STADISCONNECTED¶: a station disconnected from ESP32 soft-AP

SYSTEM_EVENT_AP_STAIPASSIGNED¶: ESP32 soft-AP assign an IP to a connected station

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

SYSTEM_EVENT_GOT_IP6¶: ESP32 station or ap or ethernet interface v6IP addr is preferred

SYSTEM_EVENT_ETH_START¶: ESP32 ethernet start

SYSTEM_EVENT_ETH_STOP¶: ESP32 ethernet stop

SYSTEM_EVENT_ETH_CONNECTED¶: ESP32 ethernet phy link up

SYSTEM_EVENT_ETH_DISCONNECTED¶: ESP32 ethernet phy link down

SYSTEM_EVENT_ETH_GOT_IP¶: ESP32 ethernet got IP from connected AP

SYSTEM_EVENT_MAX¶: Number of members in this enum

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