esp-idf/examples/protocols/http_server/advanced_tests/main/main.c

#include "esp_wifi.h"
#include "esp_event_loop.h"
#include "esp_log.h"
#include "esp_system.h"
#include "nvs_flash.h"

#include "tests.h"

/* The examples use simple WiFi configuration that you can set via
   'make menuconfig'.

   If you'd rather not, just change the below entries to strings with
   the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
*/
#define EXAMPLE_WIFI_SSID CONFIG_WIFI_SSID
#define EXAMPLE_WIFI_PASS CONFIG_WIFI_PASSWORD

static const char *TAG="TEST_WIFI";

static esp_err_t event_handler(void *ctx, system_event_t *event)
{
    httpd_handle_t *hd = (httpd_handle_t *) ctx;

    switch(event->event_id) {
    case SYSTEM_EVENT_STA_START:
        ESP_LOGI(TAG, "SYSTEM_EVENT_STA_START");
        esp_wifi_connect();
        break;
    case SYSTEM_EVENT_STA_GOT_IP:
        ESP_LOGI(TAG, "SYSTEM_EVENT_STA_GOT_IP");
        ESP_LOGI(TAG, "Got IP: '%s'",
                 ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));

        // Start webserver tests
        if (*hd == NULL) {
            *hd = start_tests();
        }

        break;
    case SYSTEM_EVENT_STA_DISCONNECTED:
        ESP_LOGI(TAG, "SYSTEM_EVENT_STA_DISCONNECTED");
        esp_wifi_connect();

        // Stop webserver tests
        if (*hd) {
            stop_tests(*hd);
            *hd = NULL;
        }

        break;
    default:
        break;
    }
    return ESP_OK;
}

static void initialise_wifi(void)
{
    tcpip_adapter_init();
    static httpd_handle_t hd = NULL;
    ESP_ERROR_CHECK(esp_event_loop_init(event_handler, &hd));
    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));
    ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
    wifi_config_t wifi_config = {
        .sta = {
            .ssid = EXAMPLE_WIFI_SSID,
            .password = EXAMPLE_WIFI_PASS,
        },
    };
    ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
    ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config));
    ESP_ERROR_CHECK(esp_wifi_start());
}

void app_main()
{
    ESP_ERROR_CHECK(nvs_flash_init());
    initialise_wifi();
}