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#include <freertos/FreeRTOS.h>
#include <freertos/event_groups.h>
#include <freertos/task.h>
#include <esp_log.h>
#include <esp_wifi.h>
#include "wifi.h"
#define WIFI_MAX_RETRY 5
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_ERROR_BIT BIT1
static const char* TAG = "wifi";
static int wifi_retry_num = 0;
static EventGroupHandle_t wifi_evt_group;
static void wifi_evt_handler(
void *arg,
esp_event_base_t eb,
int32_t id,
void *data)
{
if (eb == WIFI_EVENT && id == WIFI_EVENT_STA_DISCONNECTED) {
if (wifi_retry_num < WIFI_MAX_RETRY) {
esp_wifi_connect();
wifi_retry_num++;
ESP_LOGI(TAG, "trying to connect to AP...");
} else {
ESP_LOGE(TAG,"connection to AP failed");
xEventGroupSetBits(wifi_evt_group, WIFI_ERROR_BIT);
}
} else if (eb == IP_EVENT && id == IP_EVENT_STA_GOT_IP) {
ip_event_got_ip_t* evt = (ip_event_got_ip_t*) data;
ESP_LOGI(
TAG,
"connected to AP with ip:" IPSTR,
IP2STR(&evt->ip_info.ip));
wifi_retry_num = 0;
xEventGroupSetBits(wifi_evt_group, WIFI_CONNECTED_BIT);
}
}
void wifi_connect(void)
{
ESP_ERROR_CHECK(esp_netif_init());
wifi_evt_group = xEventGroupCreate();
esp_netif_create_default_wifi_sta();
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
esp_event_handler_instance_t any_id;
ESP_ERROR_CHECK(
esp_event_handler_instance_register(
WIFI_EVENT,
ESP_EVENT_ANY_ID,
&wifi_evt_handler,
NULL,
&any_id));
esp_event_handler_instance_t got_ip;
ESP_ERROR_CHECK(
esp_event_handler_instance_register(
IP_EVENT,
IP_EVENT_STA_GOT_IP,
&wifi_evt_handler,
NULL,
&got_ip));
wifi_config_t wifi_config = {
.sta = {
.ssid = CONFIG_WIFI_SSID,
.password = CONFIG_WIFI_PASS,
.threshold.authmode = WIFI_AUTH_WPA2_PSK
},
};
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());
ESP_ERROR_CHECK(esp_wifi_connect());
xEventGroupWaitBits(
wifi_evt_group,
WIFI_CONNECTED_BIT | WIFI_ERROR_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
ESP_LOGI(TAG, "wifi station initialized");
}
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