ESP8266+eclipse+AP+最简单webserver

实现AP模式下，http-server功能

在ESP8266_RTOS_SDK\ESP8266_RTOS_SDK\examples\wifi\getting_started\softAP增加webserver部分代码

1. 代码

//softap_example_main.c

/*  WiFi softAP Example

   This example code is in the Public Domain (or CC0 licensed, at your option.)

   Unless required by applicable law or agreed to in writing, this
   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied.
*/
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"

#include "lwip/err.h"
#include "lwip/sys.h"

#include "esp_http_server.h"
#include "web_server.h"

/* The examples use WiFi configuration that you can set via project configuration menu.

   If you'd rather not, just change the below entries to strings with
   the config you want - ie #define EXAMPLE_WIFI_SSID "mywifissid"
*/
#define EXAMPLE_ESP_WIFI_SSID      CONFIG_ESP_WIFI_SSID
#define EXAMPLE_ESP_WIFI_PASS      ""//CONFIG_ESP_WIFI_PASSWORD
#define EXAMPLE_MAX_STA_CONN       CONFIG_ESP_MAX_STA_CONN

static const char *TAG = "wifi softAP";
static httpd_handle_t server = NULL;

static void wifi_event_handler(void* arg, esp_event_base_t event_base,
                                    int32_t event_id, void* event_data)
{
    if (event_id == WIFI_EVENT_AP_STACONNECTED) {
        wifi_event_ap_staconnected_t* event = (wifi_event_ap_staconnected_t*) event_data;
        ESP_LOGI(TAG, "station "MACSTR" join, AID=%d",
                 MAC2STR(event->mac), event->aid);
    } else if (event_id == WIFI_EVENT_AP_STADISCONNECTED) {
        wifi_event_ap_stadisconnected_t* event = (wifi_event_ap_stadisconnected_t*) event_data;
        ESP_LOGI(TAG, "station "MACSTR" leave, AID=%d",
                 MAC2STR(event->mac), event->aid);
    }
}

void wifi_init_softap()
{
    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, &wifi_event_handler, NULL));

    wifi_config_t wifi_config = {
        .ap = {
            .ssid = EXAMPLE_ESP_WIFI_SSID,
            .ssid_len = strlen(EXAMPLE_ESP_WIFI_SSID),
            .password = EXAMPLE_ESP_WIFI_PASS,
            .max_connection = EXAMPLE_MAX_STA_CONN,
            .authmode = WIFI_AUTH_WPA_WPA2_PSK
        },
    };
    if (strlen(EXAMPLE_ESP_WIFI_PASS) == 0) {
        wifi_config.ap.authmode = WIFI_AUTH_OPEN;
    }

    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
    ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
    ESP_ERROR_CHECK(esp_wifi_start());

    ESP_LOGI(TAG, "wifi_init_softap finished. SSID:%s password:%s",
             EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
}


void app_main()
{
    ESP_ERROR_CHECK(nvs_flash_init());

    ESP_LOGI(TAG, "ESP_WIFI_MODE_AP");
    wifi_init_softap();

    server = start_webserver();
}

//web_server.c

#include "esp_http_server.h"
#include "esp_log.h"
#include "web_server.h"

static const char *TAG_http = "wifi web_server";

// HTTP服务器配置
esp_err_t http_get_handler(httpd_req_t *req)
{
    const char* resp_str = "<html><body><h1>Hello ESP8266!</h1></body></html>";
    ESP_LOGI(TAG_http, "Send Index HTML");
    httpd_resp_send(req, resp_str, strlen(resp_str));
    return ESP_OK;
}

httpd_handle_t start_webserver(void)
{
    httpd_handle_t server = NULL;
    httpd_config_t config = HTTPD_DEFAULT_CONFIG();
    // 设置HTTP请求处理路由
    httpd_uri_t uri = {
        .uri       = "/",
        .method    = HTTP_GET,
        .handler   = http_get_handler,
        .user_ctx  = NULL
    };

    // 启动HTTP服务器
    ESP_LOGI(TAG_http, "Starting server on port: '%d'", config.server_port);
    if (httpd_start(&server, &config) == ESP_OK) {
        ESP_LOGI(TAG_http, "Server started");
        ESP_LOGI(TAG_http, "Adding URI: %s", uri.uri);
        if (httpd_register_uri_handler(server, &uri) == ESP_OK) {
            ESP_LOGI(TAG_http, "URI added");
        }
    }
    return server;
}

//web_server.h

#ifndef EXAMPLES_WIFI_GETTING_STARTED_SOFTAP_MAIN_WEB_SERVER_H_
#define EXAMPLES_WIFI_GETTING_STARTED_SOFTAP_MAIN_WEB_SERVER_H_

httpd_handle_t start_webserver(void);

#endif /* EXAMPLES_WIFI_GETTING_STARTED_SOFTAP_MAIN_WEB_SERVER_H_ */

2. 下载

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Wrote 3072 bytes (83 compressed) at 0x00008000 in 0.0 seconds (effective 1890.6 kbit/s)...
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3. 效果