1 /* WiFi softAP Example
2
3 This example code is in the Public Domain (or CC0 licensed, at your option.)
4
5 Unless required by applicable law or agreed to in writing, this
6 software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
7 CONDITIONS OF ANY KIND, either express or implied.
8 */
9 #include <string.h>
10 #include "freertos/FreeRTOS.h"
11 #include "freertos/task.h"
12 #include "esp_system.h"
13 #include "esp_wifi.h"
14 #include "esp_event.h"
15 #include "esp_log.h"
16 #include "nvs_flash.h"
17
18 #include "lwip/err.h"
19 #include "lwip/sys.h"
20
21 /* The examples use WiFi configuration that you can set via project configuration menu.
22
23 If you'd rather not, just change the below entries to strings with
24 the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
25 */
26 #define EXAMPLE_ESP_WIFI_SSID CONFIG_ESP_WIFI_SSID
27 #define EXAMPLE_ESP_WIFI_PASS CONFIG_ESP_WIFI_PASSWORD
28 #define EXAMPLE_ESP_WIFI_CHANNEL CONFIG_ESP_WIFI_CHANNEL
29 #define EXAMPLE_MAX_STA_CONN CONFIG_ESP_MAX_STA_CONN
30
31 static const char *TAG = "wifi softAP";
32
wifi_event_handler(void * arg,esp_event_base_t event_base,int32_t event_id,void * event_data)33 static void wifi_event_handler(void* arg, esp_event_base_t event_base,
34 int32_t event_id, void* event_data)
35 {
36 if (event_id == WIFI_EVENT_AP_STACONNECTED) {
37 wifi_event_ap_staconnected_t* event = (wifi_event_ap_staconnected_t*) event_data;
38 ESP_LOGI(TAG, "station "MACSTR" join, AID=%d",
39 MAC2STR(event->mac), event->aid);
40 } else if (event_id == WIFI_EVENT_AP_STADISCONNECTED) {
41 wifi_event_ap_stadisconnected_t* event = (wifi_event_ap_stadisconnected_t*) event_data;
42 ESP_LOGI(TAG, "station "MACSTR" leave, AID=%d",
43 MAC2STR(event->mac), event->aid);
44 }
45 }
46
wifi_init_softap(void)47 void wifi_init_softap(void)
48 {
49 ESP_ERROR_CHECK(esp_netif_init());
50 ESP_ERROR_CHECK(esp_event_loop_create_default());
51 esp_netif_create_default_wifi_ap();
52
53 wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
54 ESP_ERROR_CHECK(esp_wifi_init(&cfg));
55
56 ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
57 ESP_EVENT_ANY_ID,
58 &wifi_event_handler,
59 NULL,
60 NULL));
61
62 wifi_config_t wifi_config = {
63 .ap = {
64 .ssid = EXAMPLE_ESP_WIFI_SSID,
65 .ssid_len = strlen(EXAMPLE_ESP_WIFI_SSID),
66 .channel = EXAMPLE_ESP_WIFI_CHANNEL,
67 .password = EXAMPLE_ESP_WIFI_PASS,
68 .max_connection = EXAMPLE_MAX_STA_CONN,
69 .authmode = WIFI_AUTH_WPA_WPA2_PSK
70 },
71 };
72 if (strlen(EXAMPLE_ESP_WIFI_PASS) == 0) {
73 wifi_config.ap.authmode = WIFI_AUTH_OPEN;
74 }
75
76 ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
77 ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &wifi_config));
78 ESP_ERROR_CHECK(esp_wifi_start());
79
80 ESP_LOGI(TAG, "wifi_init_softap finished. SSID:%s password:%s channel:%d",
81 EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS, EXAMPLE_ESP_WIFI_CHANNEL);
82 }
83
app_main(void)84 void app_main(void)
85 {
86 //Initialize NVS
87 esp_err_t ret = nvs_flash_init();
88 if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
89 ESP_ERROR_CHECK(nvs_flash_erase());
90 ret = nvs_flash_init();
91 }
92 ESP_ERROR_CHECK(ret);
93
94 ESP_LOGI(TAG, "ESP_WIFI_MODE_AP");
95 wifi_init_softap();
96 }
97
