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+/*
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+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
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+ *
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+ * SPDX-License-Identifier: CC0-1.0
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+ */
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+
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+#include <string.h>
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+#include <stdlib.h>
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+#include "freertos/FreeRTOS.h"
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+#include "freertos/task.h"
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+#include "freertos/event_groups.h"
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+#include "esp_wifi.h"
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+#include "esp_wpa2.h"
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+#include "esp_event.h"
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+#include "esp_log.h"
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+#include "esp_system.h"
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+#include "nvs_flash.h"
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+#include "esp_netif.h"
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+
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+/* The examples use simple WiFi configuration that you can set via
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+ project configuration menu.
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+
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+ If you'd rather not, just change the below entries to strings with
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+ the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
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+
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+*/
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+#define EXAMPLE_WIFI_SSID CONFIG_EXAMPLE_WIFI_SSID
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+
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+#define EXAMPLE_EAP_ID CONFIG_EXAMPLE_EAP_ID
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+#define EXAMPLE_EAP_USERNAME CONFIG_EXAMPLE_EAP_USERNAME
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+#define EXAMPLE_EAP_PASSWORD CONFIG_EXAMPLE_EAP_PASSWORD
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+
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+/* FreeRTOS event group to signal when we are connected & ready to make a request */
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+static EventGroupHandle_t wifi_event_group;
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+
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+/* esp netif object representing the WIFI station */
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+static esp_netif_t *sta_netif = NULL;
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+
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+/* The event group allows multiple bits for each event,
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+ but we only care about one event - are we connected
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+ to the AP with an IP? */
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+const int CONNECTED_BIT = BIT0;
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+
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+static const char *TAG = "example";
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+
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+/* CA cert, taken from ca.pem
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+
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+ To embed it in the app binary, the PEM, CRT and KEY file is named
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+ in the component.mk COMPONENT_EMBED_TXTFILES variable.
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+*/
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+#if defined(CONFIG_EXAMPLE_VALIDATE_SERVER_CERT)
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+extern uint8_t ca_pem_start[] asm("_binary_ca_pem_start");
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+extern uint8_t ca_pem_end[] asm("_binary_ca_pem_end");
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+#endif
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+extern uint8_t pac_file_pac_start[] asm("_binary_pac_file_pac_start");
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+extern uint8_t pac_file_pac_end[] asm("_binary_pac_file_pac_end");
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+
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+static void event_handler(void* arg, esp_event_base_t event_base,
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+ int32_t event_id, void* event_data)
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+{
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+ if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
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+ esp_wifi_connect();
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+ } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
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+ esp_wifi_connect();
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+ xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
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+ } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
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+ xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
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+ }
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+}
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+
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+static void initialise_wifi(void)
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+{
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+#if defined(CONFIG_EXAMPLE_VALIDATE_SERVER_CERT)
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+ unsigned int ca_pem_bytes = ca_pem_end - ca_pem_start;
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+#endif
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+ unsigned int pac_file_bytes = pac_file_pac_end - pac_file_pac_start;
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+
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+ ESP_ERROR_CHECK(esp_netif_init());
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+ wifi_event_group = xEventGroupCreate();
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+ ESP_ERROR_CHECK(esp_event_loop_create_default());
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+ sta_netif = esp_netif_create_default_wifi_sta();
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+ assert(sta_netif);
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+
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+ wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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+ ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
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+ ESP_ERROR_CHECK( esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL) );
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+ ESP_ERROR_CHECK( esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL) );
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+ ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
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+ wifi_config_t wifi_config = {
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+ .sta = {
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+ .ssid = EXAMPLE_WIFI_SSID,
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+#if defined(CONFIG_EXAMPLE_WPA3_ENTERPRISE)
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+ .pmf_cfg = {
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+ .capable = true,
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+ .required = false
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+ },
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+#endif
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+ },
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+ };
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+ ESP_LOGI(TAG, "Setting WiFi configuration SSID %s...", wifi_config.sta.ssid);
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+ ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
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+ ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
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+ ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)EXAMPLE_EAP_ID, strlen(EXAMPLE_EAP_ID)) );
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+
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+#if defined(CONFIG_EXAMPLE_VALIDATE_SERVER_CERT) || \
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+ defined(CONFIG_EXAMPLE_WPA3_ENTERPRISE)
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+ ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_ca_cert(ca_pem_start, ca_pem_bytes) );
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+#endif /* CONFIG_EXAMPLE_VALIDATE_SERVER_CERT */ /* EXAMPLE_WPA3_ENTERPRISE */
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+
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+ ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_username((uint8_t *)EXAMPLE_EAP_USERNAME, strlen(EXAMPLE_EAP_USERNAME)) );
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+ ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_password((uint8_t *)EXAMPLE_EAP_PASSWORD, strlen(EXAMPLE_EAP_PASSWORD)) );
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+ ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_pac_file(pac_file_pac_start, pac_file_bytes - 1) );
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+ esp_eap_fast_config eap_fast_config = {
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+ .fast_provisioning = 2,
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+ .fast_max_pac_list_len = 0,
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+ .fast_pac_format_binary = false
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+ };
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+ ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_set_fast_phase1_params(eap_fast_config) );
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+
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+ ESP_ERROR_CHECK( esp_wifi_sta_wpa2_ent_enable() );
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+ ESP_ERROR_CHECK( esp_wifi_start() );
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+}
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+
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+static void wpa2_enterprise_example_task(void *pvParameters)
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+{
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+ esp_netif_ip_info_t ip;
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+ memset(&ip, 0, sizeof(esp_netif_ip_info_t));
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+ vTaskDelay(2000 / portTICK_PERIOD_MS);
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+
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+ while (1) {
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+ vTaskDelay(5000 / portTICK_PERIOD_MS);
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+
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+ if (esp_netif_get_ip_info(sta_netif, &ip) == 0) {
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+ ESP_LOGI(TAG, "~~~~~~~~~~~");
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+ ESP_LOGI(TAG, "IP:"IPSTR, IP2STR(&ip.ip));
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+ ESP_LOGI(TAG, "MASK:"IPSTR, IP2STR(&ip.netmask));
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+ ESP_LOGI(TAG, "GW:"IPSTR, IP2STR(&ip.gw));
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+ ESP_LOGI(TAG, "~~~~~~~~~~~");
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+ }
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+ }
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+}
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+
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+void app_main(void)
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+{
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+ ESP_ERROR_CHECK( nvs_flash_init() );
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+ initialise_wifi();
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+ xTaskCreate(&wpa2_enterprise_example_task, "wpa2_enterprise_example_task", 4096, NULL, 5, NULL);
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+}
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Hrudaynath Dhabe