esp8266 配置网页

参考资料:
从零开始的ESP8266探索（06）-使用Server功能搭建Web Server
https://blog.csdn.net/Naisu_kun/article/details/80398667

#include 

/*** 该工程可以在2.4.0版本esp8266库中运行，没在更高版本库中进行测试 ***/

const char *ssid = "HelloWifi";
const char *password = "123ab";

WiFiServer server(80);

String readString = ""; //建立一个字符串对象用来接收存放来自客户的数据

//响应头
String responseHeaders =
    String("") +
    "HTTP/1.1 200 OK\r\n" +
    "Content-Type: text/html\r\n" +
    "Connection: close\r\n" +
    "\r\n";

//网页
String myhtmlPage =
    String("") +
    "" +
    "" +
    "    " +
    "    " +
    "" +
    "" +
    "    
Unkwon
" +
    "    " +
    "" +
    "";

bool isLedTurnOpen = false; // 记录LED状态

void setup()
{
    pinMode(2, OUTPUT);
    digitalWrite(2, HIGH); // 熄灭LED

    Serial.begin(115200);
    Serial.println();

    Serial.printf("Connecting to %s ", ssid);
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED)
    {
        delay(500);
        Serial.print(".");
    }
    Serial.println(" connected");

    server.begin();
    Serial.printf("Web server started, open %s in a web browser\n", WiFi.localIP().toString().c_str());
}

void loop()
{
    WiFiClient client = server.available(); //尝试建立客户对象
    if (client)                             //如果当前有客户可用
    {
        boolean currentLineIsBlank = true;
        Serial.println("[Client connected]");

        while (client.connected()) //如果客户端建立连接
        {
            if (client.available()) //等待有可读数据
            {
                char c = client.read(); //读取一字节数据
                readString += c;        //拼接数据
                /************************************************/
                if (c == '\n' && currentLineIsBlank) //等待请求头接收完成(接收到空行)
                {
                    //比较接收到的请求数据
                    if (readString.startsWith("GET / HTTP/1.1")) //如果是网页请求
                    {
                        client.print(responseHeaders); //向客户端输出网页响应
                        client.print(myhtmlPage);      //向客户端输出网页内容
                        client.print("\r\n");
                    }
                    else if (readString.startsWith("GET /Switch")) //如果是改变LED状态请求
                    {
                        if (isLedTurnOpen == false)
                        {
                            digitalWrite(2, LOW); // 点亮LED
                            client.print("LED has been turn on");
                            isLedTurnOpen = true;
                        }
                        else
                        {
                            digitalWrite(2, HIGH); // 熄灭LED
                            client.print("LED has been turn off");
                            isLedTurnOpen = false;
                        }
                    }
                    else
                    {
                        client.print("\r\n");
                    }
                    break;
                }

                if (c == '\n')
                {
                    currentLineIsBlank = true; //开始新行
                }
                else if (c != '\r')
                {
                    currentLineIsBlank = false; //正在接收某行中
                }
                /************************************************/
            }
        }
        delay(1);      //等待客户完成接收
        client.stop(); //结束当前连接:
        Serial.println("[Client disconnected]");

        Serial.println(readString); //打印输出来自客户的数据
        readString = "";
    }
}

参考2：

注意: wifiManager.resetSettings();
【LinkNode D1】ESP8266 连接到路由器上
http://jingyan.eeboard.com/article/75186

#include 

#include 

#include 

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 


void setup() {
    // put your setup code here, to run once:
    Serial.begin(115200);

    //WiFiManager
    //Local intialization. Once its business is done, there is no need to keep it around
    WiFiManager wifiManager;
    //reset saved settings
    wifiManager.resetSettings();

    //set custom ip for portal
    wifiManager.setAPStaticIPConfig(IPAddress(10,0,1,1), IPAddress(10,0,1,1), IPAddress(255,255,255,0));

    //fetches ssid and pass from eeprom and tries to connect
    //if it does not connect it starts an access point with the specified name
    //here  "AutoConnectAP"
    //and goes into a blocking loop awaiting configuration
    wifiManager.autoConnect("LinkNodeAP");
    //or use this for auto generated name ESP + ChipID
    //wifiManager.autoConnect();

    //if you get here you have connected to the WiFi
    Serial.println("connected... :)");
      pinMode(BUILTIN_LED, OUTPUT);
}

void loop() {
    digitalWrite(BUILTIN_LED, HIGH);   // turn the LED on (HIGH is the voltage level)
 delay(1000);              // wait for a second
 digitalWrite(BUILTIN_LED, LOW);    // turn the LED off by making the voltage LOW
 delay(1000);              // wait for a second
}

需要安装：

参考3：
Arduino IDE for ESP8266 教程(一) 局域网 网页查看数据 不控制
https://www.cnblogs.com/kekeoutlook/p/8284213.html

/*
 * Copyright (c) 2015, Majenko Technologies
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice, this
 *   list of conditions and the following disclaimer in the documentation and/or
 *   other materials provided with the distribution.
 *
 * * Neither the name of Majenko Technologies nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include 
#include 
#include 
#include 

const char *ssid = "LRTech";
const char *password = "lanrui2017";

ESP8266WebServer server ( 80 );

const int led = 13;

void handleRoot() {
    digitalWrite ( led, 1 );
    char temp[400];
    int sec = millis() / 1000;
    int min = sec / 60;
    int hr = min / 60;

    snprintf ( temp, 400,

"\
  \
    \
    \
    \
  \
  \
    
Hello from ESP8266!
\
    
Uptime: %02d:%02d:%02d
\
    \
  \
",

        hr, min % 60, sec % 60
    );
    server.send ( 200, "text/html", temp );
    digitalWrite ( led, 0 );
}

void handleNotFound() {
    digitalWrite ( led, 1 );
    String message = "File Not Found\n\n";
    message += "URI: ";
    message += server.uri();
    message += "\nMethod: ";
    message += ( server.method() == HTTP_GET ) ? "GET" : "POST";
    message += "\nArguments: ";
    message += server.args();
    message += "\n";

    for ( uint8_t i = 0; i < server.args(); i++ ) {
        message += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n";
    }

    server.send ( 404, "text/plain", message );
    digitalWrite ( led, 0 );
}

void setup ( void ) {
    pinMode ( led, OUTPUT );
    digitalWrite ( led, 0 );
    Serial.begin ( 115200 );
    WiFi.begin ( ssid, password );
    Serial.println ( "" );

    // Wait for connection
    while ( WiFi.status() != WL_CONNECTED ) {
        delay ( 500 );
        Serial.print ( "." );
    }

    Serial.println ( "" );
    Serial.print ( "Connected to " );
    Serial.println ( ssid );
    Serial.print ( "IP address: " );
    Serial.println ( WiFi.localIP() );

    if ( MDNS.begin ( "esp8266" ) ) {
        Serial.println ( "MDNS responder started" );
    }

    server.on ( "/", handleRoot );
    server.on ( "/test.svg", drawGraph );
    server.on ( "/inline", []() {
        server.send ( 200, "text/plain", "this works as well" );
    } );
    server.onNotFound ( handleNotFound );
    server.begin();
    Serial.println ( "HTTP server started" );
}

void loop ( void ) {
    server.handleClient();
}

void drawGraph() {
    String out = "";
    char temp[100];
    out += ";
    out += "\n";
    out += "\n";
    int y = rand() % 130;
    for (int x = 10; x < 390; x+= 10) {
        int y2 = rand() % 130;
        sprintf(temp, "\n", x, 140 - y, x + 10, 140 - y2);
        out += temp;
        y = y2;
    }
    out += "\n\n";

    server.send ( 200, "image/svg+xml", out);
}