ESP32创建AP

1 typedef union {
2     wifi_ap_config_t  ap;  /**< configuration of AP */
3     wifi_sta_config_t sta; /**< configuration of STA */
4 } wifi_config_t;

wifi初始化结构体，里面有两个成员，一个用来配置AP参数，一个用来配置STA模式

 1 /** @brief Soft-AP configuration settings for the ESP32 */
 2 typedef struct {
 3     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. */
 4     uint8_t password[64];       /**< Password of ESP32 soft-AP. */
 5     uint8_t ssid_len;           /**< Optional length of SSID field. */
 6     uint8_t channel;            /**< Channel of ESP32 soft-AP */
 7     wifi_auth_mode_t authmode;  /**< Auth mode of ESP32 soft-AP. Do not support AUTH_WEP in soft-AP mode */
 8     uint8_t ssid_hidden;        /**< Broadcast SSID or not, default 0, broadcast the SSID */
 9     uint8_t max_connection;     /**< Max number of stations allowed to connect in, default 4, max 10 */
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 */
11     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. */
12     bool ftm_responder;         /**< Enable FTM Responder mode */
13 } wifi_ap_config_t;

AP参数初始化结构体，一些参数可以在menuconfig中配置，也可以在程序中自行定义。

 1 wifi_config_t wifi_config = {
 2         .ap = {
 3             .ssid = EXAMPLE_ESP_WIFI_SSID,
 4             .ssid_len = strlen(EXAMPLE_ESP_WIFI_SSID),
 5             .channel = EXAMPLE_ESP_WIFI_CHANNEL,
 6             .password = EXAMPLE_ESP_WIFI_PASS,
 7             .max_connection = EXAMPLE_MAX_STA_CONN,
 8             .authmode = WIFI_AUTH_WPA_WPA2_PSK
 9         },
10     };

创建一个wifi初始化结构体，并对参数进行设置，一些没有设置的参数会采用默认值。

1 ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
2 ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &wifi_config));
3 ESP_ERROR_CHECK(esp_wifi_start());

最后调用三个函数，设置wifi模式，wifi初始化，启动wifi。