esp32blufi

ESP32 Blufi是一种基于蓝牙通道的Wi-Fi网络配置功能，适用于ESP32。它通过安全协议将Wi-Fi配置和证书传输到ESP32，然后ESP32可以基于这些信息连接到AP或建立SoftAP。使用ESP32 Blufi可以方便地进行Wi-Fi网络配置，而无需连接到串行端口。以下是使用ESP32 Blufi进行Wi-Fi网络配置的步骤：

1.下载并烧录ESP32 Blufi BIN文件到ESP32开发板中。
2.使用蓝牙调试应用程序连接ESP32开发板。
3.在蓝牙调试应用程序中输入Wi-Fi网络的SSID和密码。
4.ESP32将自动连接到Wi-Fi网络。

以下是ESP32 Blufi的示例代码：

#include <WiFi.h>
#include <esp_wifi.h>
#include <esp_wpa2.h>
#include <esp_event_loop.h>
#include <esp_log.h>
#include <nvs_flash.h>
#include <blufi.h>

#define EXAMPLE_ESP_WIFI_SSID      "your_ssid"
#define EXAMPLE_ESP_WIFI_PASS      "your_password"
#define EXAMPLE_ESP_MAXIMUM_RETRY  5

static EventGroupHandle_t s_wifi_event_group;
static int s_retry_num = 0;
static const char *TAG = "wifi station";

static void event_handler(void* arg, esp_event_base_t event_base,
                                int32_t event_id, void* event_data)
{
    if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
        esp_wifi_connect();
    } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
        if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY) {
            esp_wifi_connect();
            s_retry_num++;
            ESP_LOGI(TAG, "retry to connect to the AP");
        }
        ESP_LOGI(TAG,"connect to the AP fail\n");
    } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
        ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
        ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
        s_retry_num = 0;
        xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
    }
}

void wifi_init_sta(void)
{
    s_wifi_event_group = xEventGroupCreate();

    tcpip_adapter_init();
    ESP_ERROR_CHECK(esp_event_loop_create_default());

    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));

    ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL));
    ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL));

    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());

    xEventGroupWaitBits(s_wifi_event_group, WIFI_CONNECTED_BIT, false, true, portMAX_DELAY);
    ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",
             EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
}

void blufi_event_callback(esp_blufi_cb_event_t event, esp_blufi_cb_param_t *param)
{
    switch (event) {
        case ESP_BLUFI_EVENT_INIT_FINISH:
            ESP_LOGI(TAG, "Blufi init finish\n");
            esp_ble_gap_set_device_name("ESP32-BLUEFI");
            esp_ble_gap_config_adv_data(&blufi_adv_data);
            break;
        case ESP_BLUFI_EVENT_DEINIT_FINISH:
            break;
        case ESP_BLUFI_EVENT_BLE_CONNECT:
            ESP_LOGI(TAG, "Blufi ble connect\n");
            break;
        case ESP_BLUFI_EVENT_BLE_DISCONNECT:
            ESP_LOGI(TAG, "Blufi ble disconnect\n");
            break;
        case ESP_BLUFI_EVENT_SET_WIFI_OPMODE:
            ESP_LOGI(TAG, "Blufi set wifi opmode %d\n", param->wifi_mode.op_mode);
            wifi_init_sta();
            break;
        case ESP_BLUFI_EVENT_REQ_CONNECT_TO_AP:
            ESP_LOGI(TAG, "Blufi requset wifi connect to AP\n");
            wifi_config_t sta_config;
            memset(&sta_config, 0, sizeof(sta_config));
            memcpy(sta_config.sta.ssid, param->connect_to_ap.ssid, param->connect_to_ap.ssid_len);
            memcpy(sta_config.sta.password, param->connect_to_ap.password, param->connect_to_ap.password_len);
            sta_config.sta.bssid_set = param->connect_to_ap.bssid_set;
            if (sta_config.sta.bssid_set == true) {
                memcpy(sta_config.sta.bssid, param->connect_to_ap.bssid, 6);
            }
            esp_wifi_disconnect();
            esp_wifi_set_config(ESP_IF_WIFI_STA, &sta_config);
            esp_wifi_connect();
            break;
        case ESP_BLUFI_EVENT_REQ_DISCONNECT_FROM_AP:
            ESP_LOGI(TAG, "Blufi requset wifi disconnect from AP\n");
            esp_wifi_disconnect();
            break;
        default:
            break;
    }
}

void app_main()
{
    ESP_ERROR_CHECK(nvs_flash_init());
    ESP_ERROR_CHECK(esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT));
    esp_bluedroid_init();
    esp_bluedroid_enable();
    esp_ble_gap_register_callback(blufi_event_callback);
    esp_blufi_register_callbacks(&blufi_callbacks);
    esp_blufi_profile_init();
}