120 lines
4.8 KiB
C
120 lines
4.8 KiB
C
#include "wifi.h"
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#include "secrets.h"
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#include "config.h"
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/* WiFi station 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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/* FreeRTOS event group to signal when we are connected*/
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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 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 const char *TAG = "wifi station";
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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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{
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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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if (s_retry_num < ESP_MAXIMUM_RETRY) {
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esp_wifi_connect();
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s_retry_num++;
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ESP_LOGI(TAG, "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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ESP_LOGI(TAG,"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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ESP_LOGI(TAG, "got ip:" 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_sta(void) {
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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_t *sta_netif = 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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#ifndef ESP_HOSTNAME
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#error "ESP_HOSTNAME is not defined in config.h"
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#endif
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esp_err_t err = esp_netif_set_hostname(sta_netif, ESP_HOSTNAME);
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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(WIFI_EVENT,
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ESP_EVENT_ANY_ID,
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&event_handler,
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NULL,
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&instance_any_id));
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ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
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IP_EVENT_STA_GOT_IP,
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&event_handler,
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NULL,
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&instance_got_ip));
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = ESP_WIFI_SSID,
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.password = ESP_WIFI_PASS,
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/* Setting a password implies station will connect to all security modes including WEP/WPA.
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* However these modes are deprecated and not advisable to be used. Incase your Access point
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* doesn't support WPA2, these mode can be enabled by commenting below line */
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.threshold.authmode = WIFI_AUTH_WPA2_PSK,
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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(WIFI_IF_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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/* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
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* number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
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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,
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pdFALSE,
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portMAX_DELAY);
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/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
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* happened. */
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if (bits & WIFI_CONNECTED_BIT) {
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ESP_LOGI(TAG, "connected to ap SSID:%s.",
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ESP_WIFI_SSID);
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} else if (bits & WIFI_FAIL_BIT) {
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ESP_LOGI(TAG, "Failed to connect to SSID:%s.",
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ESP_WIFI_SSID);
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} else {
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ESP_LOGE(TAG, "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(IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));
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ESP_ERROR_CHECK(esp_event_handler_instance_unregister(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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