105 lines
3.7 KiB
C
105 lines
3.7 KiB
C
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// Code taken from the ESP32 IDF WiFi station Example
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#include <string.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 "esp_wifi.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/event_groups.h"
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#include "freertos/task.h"
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#include "nvs_flash.h"
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#include "lwip/err.h"
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#include "lwip/sys.h"
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#include "mongoose.h"
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static EventGroupHandle_t s_wifi_event_group;
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/* The event group allows multiple bits for each event, but we only care about
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* two events:
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* - we are connected to the AP with an IP
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* - we failed to connect after the maximum amount of retries */
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#define WIFI_CONNECTED_BIT BIT0
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#define WIFI_FAIL_BIT BIT1
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static int s_retry_num = 0;
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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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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 &&
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event_id == WIFI_EVENT_STA_DISCONNECTED) {
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if (s_retry_num < 3) {
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esp_wifi_connect();
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s_retry_num++;
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MG_INFO(("retry to connect to the AP"));
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} else {
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xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
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}
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MG_ERROR(("connect to the AP fail"));
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} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
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ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
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MG_INFO(("IP ADDRESS:" IPSTR, IP2STR(&event->ip_info.ip)));
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s_retry_num = 0;
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xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
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}
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}
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void wifi_init(const char *ssid, const char *pass) {
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
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ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK(ret);
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s_wifi_event_group = xEventGroupCreate();
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ESP_ERROR_CHECK(esp_netif_init());
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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esp_netif_create_default_wifi_sta();
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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_event_handler_instance_t instance_any_id;
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esp_event_handler_instance_t instance_got_ip;
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ESP_ERROR_CHECK(esp_event_handler_instance_register(
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WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, &instance_any_id));
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ESP_ERROR_CHECK(esp_event_handler_instance_register(
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IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, &instance_got_ip));
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wifi_config_t c = {.sta = {.threshold = {.authmode = WIFI_AUTH_WPA2_PSK},
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.pmf_cfg = {.capable = true, .required = false}}};
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snprintf((char *) c.sta.ssid, sizeof(c.sta.ssid), "%s", ssid);
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snprintf((char *) c.sta.password, sizeof(c.sta.password), "%s", pass);
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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(ESP_IF_WIFI_STA, &c));
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ESP_ERROR_CHECK(esp_wifi_start());
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MG_DEBUG(("wifi_init_sta finished."));
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EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
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WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
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pdFALSE, pdFALSE, portMAX_DELAY);
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if (bits & WIFI_CONNECTED_BIT) {
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MG_INFO(("connected to ap SSID:%s password:%s", ssid, pass));
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} else if (bits & WIFI_FAIL_BIT) {
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MG_ERROR(("Failed to connect to SSID:%s, password:%s", ssid, pass));
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} else {
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MG_ERROR(("UNEXPECTED EVENT"));
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}
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/* The event will not be processed after unregister */
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ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
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IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));
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ESP_ERROR_CHECK(esp_event_handler_instance_unregister(
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WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id));
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vEventGroupDelete(s_wifi_event_group);
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}
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