Espressif ESP32-S2 Programming Manual page 102

Chapter 2. API Reference
Return ESP_OK: succeed
Parameters
• type: power save type
esp_err_t esp_wifi_get_ps(wifi_ps_type_t
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
Set protocol type of specified interface The default protocol is (WIFI_PROTOCOL_11B|WIFI_PROTOCOL_11G|WIFI_PROTO
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
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
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
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
Espressif Systems
*type)
ifx, uint8_t protocol_bitmap)
ifx, uint8_t *protocol_bitmap)
ifx, wifi_bandwidth_t
ifx, wifi_bandwidth_t
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bw)
*bw)
Release v4.4