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#include <string.h>
#include <freertos/FreeRTOS.h>
#include <esp_wifi.h>
#include <esp_log.h>
#include <esp_event.h>
#include <lwip/err.h>
#include <lwip/sys.h>
#include "wifi.h"
static EventGroupHandle_t wifi_event_group;
static int retries = 0;
esp_err_t init_wifi() {
wifi_event_group = xEventGroupCreate();
esp_netif_init();
esp_err_t err = esp_event_loop_create_default();
if(err != ESP_OK) {
return err;
}
esp_netif_create_default_wifi_sta();
wifi_init_config_t wifi_initiation = WIFI_INIT_CONFIG_DEFAULT();
return esp_wifi_init(&wifi_initiation);
}
static void wifi_event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) {
const char* TAG = "wifi_event_handler";
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
esp_wifi_connect();
} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
if (retries++ < MAX_WIFI_RECONNECT_RETRIES) {
esp_wifi_connect();
ESP_LOGW(TAG, "retry to connect to the AP");
} else {
xEventGroupSetBits(wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGE(TAG, "connect to the AP fail");
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
ESP_LOGI(TAG, "got ip: " IPSTR, IP2STR(&event->ip_info.ip));
retries = 0;
xEventGroupSetBits(wifi_event_group, WIFI_CONNECTED_BIT);
}
}
esp_err_t connect_wifi(const char* ssid, const char* password) {
const char* TAG = "connect_wifi";
esp_err_t err = esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, wifi_event_handler, NULL);
if(err != ESP_OK) {
return err;
}
err = esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, wifi_event_handler, NULL);
if(err != ESP_OK) {
return err;
}
wifi_config_t wifi_config = {
.sta = {
.ssid = "",
.password = "",
.scan_method = WIFI_FAST_SCAN,
.threshold={.authmode = WIFI_AUTH_WPA2_PSK},
.sae_pwe_h2e = WPA3_SAE_PWE_BOTH,
.failure_retry_cnt = MAX_WIFI_RECONNECT_RETRIES,
.sae_h2e_identifier = "",
}
};
strcpy((char*)wifi_config.sta.ssid, ssid);
strcpy((char*)wifi_config.sta.password, password);
err = esp_wifi_set_mode(WIFI_MODE_STA);
if(err != ESP_OK) {
return err;
}
err = esp_wifi_set_config(WIFI_IF_STA, &wifi_config);
if(err != ESP_OK) {
return err;
}
err = esp_wifi_start();
if(err != ESP_OK) {
return err;
}
ESP_LOGI(TAG, "wifi_init_sta finished.");
EventBits_t bits = xEventGroupWaitBits(
wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY
);
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "connected to ap SSID:%s", ssid);
} else if (bits & WIFI_FAIL_BIT) {
ESP_LOGE(TAG, "Failed to connect to SSID:%s Password:%s", wifi_config.sta.ssid, wifi_config.sta.password);
} else {
ESP_LOGE(TAG, "UNEXPECTED EVENT");
}
return ESP_OK;
}
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