148 lines
4.5 KiB
C
148 lines
4.5 KiB
C
/* Simple WiFi Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <string.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_system.h"
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#include "esp_wifi.h"
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#include "esp_event_loop.h"
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#include "esp_log.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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/* The examples use simple WiFi configuration that you can set via
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'make menuconfig'.
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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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#define EXAMPLE_ESP_WIFI_MODE_AP CONFIG_ESP_WIFI_MODE_AP //TRUE:AP FALSE:STA
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#define EXAMPLE_ESP_WIFI_SSID CONFIG_ESP_WIFI_SSID
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#define EXAMPLE_ESP_WIFI_PASS CONFIG_ESP_WIFI_PASSWORD
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#define EXAMPLE_MAX_STA_CONN CONFIG_MAX_STA_CONN
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/* FreeRTOS event group to signal when we are connected*/
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static EventGroupHandle_t wifi_event_group;
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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 WIFI_CONNECTED_BIT = BIT0;
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static const char *TAG = "simple wifi";
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static esp_err_t event_handler(void *ctx, system_event_t *event)
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{
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switch(event->event_id) {
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case SYSTEM_EVENT_STA_START:
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esp_wifi_connect();
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break;
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case SYSTEM_EVENT_STA_GOT_IP:
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ESP_LOGI(TAG, "got ip:%s",
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ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));
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xEventGroupSetBits(wifi_event_group, WIFI_CONNECTED_BIT);
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break;
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case SYSTEM_EVENT_AP_STACONNECTED:
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ESP_LOGI(TAG, "station:"MACSTR" join, AID=%d",
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MAC2STR(event->event_info.sta_connected.mac),
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event->event_info.sta_connected.aid);
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break;
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case SYSTEM_EVENT_AP_STADISCONNECTED:
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ESP_LOGI(TAG, "station:"MACSTR"leave, AID=%d",
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MAC2STR(event->event_info.sta_disconnected.mac),
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event->event_info.sta_disconnected.aid);
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break;
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case SYSTEM_EVENT_STA_DISCONNECTED:
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esp_wifi_connect();
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xEventGroupClearBits(wifi_event_group, WIFI_CONNECTED_BIT);
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break;
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default:
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break;
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}
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return ESP_OK;
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}
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void wifi_init_softap()
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{
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wifi_event_group = xEventGroupCreate();
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tcpip_adapter_init();
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ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL));
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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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wifi_config_t wifi_config = {
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.ap = {
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.ssid = EXAMPLE_ESP_WIFI_SSID,
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.ssid_len = strlen(EXAMPLE_ESP_WIFI_SSID),
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.password = EXAMPLE_ESP_WIFI_PASS,
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.max_connection = EXAMPLE_MAX_STA_CONN,
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.authmode = WIFI_AUTH_WPA_WPA2_PSK
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},
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};
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if (strlen(EXAMPLE_ESP_WIFI_PASS) == 0) {
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wifi_config.ap.authmode = WIFI_AUTH_OPEN;
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}
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ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
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ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
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ESP_ERROR_CHECK(esp_wifi_start());
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ESP_LOGI(TAG, "wifi_init_softap finished.SSID:%s password:%s",
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EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
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}
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void wifi_init_sta()
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{
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wifi_event_group = xEventGroupCreate();
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tcpip_adapter_init();
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ESP_ERROR_CHECK(esp_event_loop_init(event_handler, NULL) );
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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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wifi_config_t wifi_config = {
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.sta = {
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.ssid = EXAMPLE_ESP_WIFI_SSID,
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.password = EXAMPLE_ESP_WIFI_PASS
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},
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};
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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, &wifi_config) );
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ESP_ERROR_CHECK(esp_wifi_start() );
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ESP_LOGI(TAG, "wifi_init_sta finished.");
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ESP_LOGI(TAG, "connect to ap SSID:%s password:%s",
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EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
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}
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void app_main()
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{
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//Initialize NVS
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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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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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#if EXAMPLE_ESP_WIFI_MODE_AP
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ESP_LOGI(TAG, "ESP_WIFI_MODE_AP");
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wifi_init_softap();
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#else
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ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
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wifi_init_sta();
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#endif /*EXAMPLE_ESP_WIFI_MODE_AP*/
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}
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