Espressif ESP32-S2 User Manual

Chapter 2. API Reference
Return
• ESP_OK: succeed
• ESP_ERR_NO_MEM: out of memory
• others: refer to error code esp_err.h
Parameters
• config: pointer to WiFi initialized 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 station 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,
Espressif Systems 88
Submit Document Feedback
Release v4.4

Espressif ESP32-S2 Specifications

General

Brand	Espressif
Model	ESP32-S2
Category	Single board computers
Language	English