mirror of
https://github.com/espressif/esp-protocols.git
synced 2025-11-04 00:21:37 +01:00
129 lines
4.7 KiB
C
129 lines
4.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Unlicense OR CC0-1.0
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*/
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/* WiFi connection
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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/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.h"
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#include "esp_log.h"
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#include "iface_info.h"
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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_connect";
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static int s_retry_num = 0;
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static EventGroupHandle_t s_wifi_event_group;
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static void event_handler(void *args, 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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struct iface_info_t *wifi_info = args;
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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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wifi_info->connected = false;
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if (s_retry_num < CONFIG_ESP_MAXIMUM_RETRY || CONFIG_ESP_MAXIMUM_RETRY == 0) {
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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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const esp_netif_ip_info_t *ip_info = &event->ip_info;
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ESP_LOGI(TAG, "WiFi station Got IP Address");
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ESP_LOGI(TAG, "~~~~~~~~~~~");
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ESP_LOGI(TAG, "IP:" IPSTR, IP2STR(&ip_info->ip));
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ESP_LOGI(TAG, "MASK:" IPSTR, IP2STR(&ip_info->netmask));
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ESP_LOGI(TAG, "GW:" IPSTR, IP2STR(&ip_info->gw));
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ESP_LOGI(TAG, "~~~~~~~~~~~");
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for (int i = 0; i < 2; ++i) {
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esp_netif_get_dns_info(wifi_info->netif, i, &wifi_info->dns[i]);
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ESP_LOGI(TAG, "DNS %i:" IPSTR, i, IP2STR(&wifi_info->dns[i].ip.u_addr.ip4));
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}
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ESP_LOGI(TAG, "~~~~~~~~~~~");
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s_retry_num = 0;
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xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
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wifi_info->connected = true;
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}
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}
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static void wifi_destroy(iface_info_t *info)
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{
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esp_netif_action_disconnected(info->netif, 0, 0, 0);
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esp_netif_action_stop(info->netif, 0, 0, 0);
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esp_wifi_stop();
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esp_wifi_deinit();
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free(info);
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}
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iface_info_t *example_wifi_init(int prio)
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{
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struct iface_info_t *wifi_info = malloc(sizeof(iface_info_t));
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assert(wifi_info);
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wifi_info->destroy = wifi_destroy;
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wifi_info->name = "WiFi station";
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s_wifi_event_group = xEventGroupCreate();
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esp_netif_inherent_config_t esp_netif_config = ESP_NETIF_INHERENT_DEFAULT_WIFI_STA();
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esp_netif_config.route_prio = prio;
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wifi_info->netif = esp_netif_create_wifi(WIFI_IF_STA, &esp_netif_config);
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esp_wifi_set_default_wifi_sta_handlers();
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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_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, event_handler, wifi_info));
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ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, event_handler, wifi_info));
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wifi_config_t wifi_config = {
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.sta = {
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.ssid = CONFIG_ESP_WIFI_SSID,
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.password = CONFIG_ESP_WIFI_PASSWORD,
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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 or a failure (connection failed or a timeout) */
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EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group, (WIFI_CONNECTED_BIT | WIFI_FAIL_BIT), pdFALSE, pdFALSE, pdMS_TO_TICKS(5000));
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if (bits & WIFI_CONNECTED_BIT) {
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ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",
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CONFIG_ESP_WIFI_SSID, CONFIG_ESP_WIFI_PASSWORD);
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} else if (bits & WIFI_FAIL_BIT) {
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ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
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CONFIG_ESP_WIFI_SSID, CONFIG_ESP_WIFI_PASSWORD);
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wifi_destroy(wifi_info);
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wifi_info = NULL;
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} else if (CONFIG_ESP_MAXIMUM_RETRY == 0) {
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ESP_LOGI(TAG, "No connection at the moment, will keep retrying...");
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} else {
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ESP_LOGE(TAG, "Failed to connect withing specified timeout");
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wifi_destroy(wifi_info);
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wifi_info = NULL;
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}
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return wifi_info;
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}
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