- [/#include <string.h>
- #include "freertos/FreeRTOS.h"
- #include "freertos/task.h"
- #include "freertos/event_groups.h"
- #include "esp_system.h"
- #include "esp_wifi.h"
- #include "esp_event_loop.h"
- #include "esp_log.h"
- #include "nvs_flash.h"
- #include "lwip/err.h"
- #include "lwip/sys.h"
- #define EXAMPLE_ESP_WIFI_SSID CONFIG_ESP_WIFI_SSID
- #define EXAMPLE_ESP_WIFI_PASS CONFIG_ESP_WIFI_PASSWORD
- #define EXAMPLE_ESP_MAXIMUM_RETRY CONFIG_ESP_MAXIMUM_RETRY
- static EventGroupHandle_t s_wifi_event_group;
- const int WIFI_CONNECTED_BIT = BIT0;
- static const char *TAG = "wifi station";
- static int s_retry_num = 0;
- static void check_status()
- {
- EventBits_t uxBits;
- uxBits = xEventGroupGetBits(s_wifi_event_group);
- if(uxBits & WIFI_CONNECTED_BIT)
- {
- printf ("wifi connected\n");
- }
- else if (!(uxBits & WIFI_CONNECTED_BIT))
- {
- printf ("wifi disconnected\n");
- }
- }
- static esp_err_t event_handler(void *ctx, system_event_t *event)
- {
- switch(event->event_id)
- {
- case SYSTEM_EVENT_STA_START:
- esp_wifi_connect();
- break;
- case SYSTEM_EVENT_STA_GOT_IP:
- ESP_LOGI(TAG, "got ip:%s",
- ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
- s_retry_num = 0;
- xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
- check_status(); // To update the wifi status
- break;
- case SYSTEM_EVENT_STA_DISCONNECTED:
- {
- esp_wifi_connect();
- xEventGroupClearBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
- check_status(); // To update the wifi status
- break;
- }
- default:
- break;
- }
- return ESP_OK;
- }
- void wifi_init_sta()
- {
- s_wifi_event_group = xEventGroupCreate();
- tcpip_adapter_init();
- ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL) );
- wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
- ESP_ERROR_CHECK(esp_wifi_init(&cfg));
- wifi_config_t wifi_config = {
- .sta = {
- .ssid = EXAMPLE_ESP_WIFI_SSID,
- .password = EXAMPLE_ESP_WIFI_PASS
- },
- };
- ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );
- ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) );
- ESP_ERROR_CHECK(esp_wifi_start() );
- ESP_LOGI(TAG, "wifi_init_sta finished.");
- ESP_LOGI(TAG, "connect to ap SSID:%s password:%s",
- EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
- }
- void app_main()
- {
- //Initialize NVS
- esp_err_t ret = nvs_flash_init();
- if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
- ESP_ERROR_CHECK(nvs_flash_erase());
- ret = nvs_flash_init();
- }
- ESP_ERROR_CHECK(ret);
- ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
- wifi_init_sta();
- }]
GET wifi status as connected or not connected
-
- Posts: 4
- Joined: Tue Nov 22, 2022 11:25 am
Re: GET wifi status as connected or not connected
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