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WiFi-ESP8266入门http(1)-建立服务器，直接发送网

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09/16
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#include <ESP8266WiFi.h>/*** 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 = "HUAWEI-H3VBKZ";
const char *password = "13991320168";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("") +
"<html>" +
"<head>" +
"<meta charset=\"utf-8\">"+
" <title>ESP8266 配置信息</title>" +
" <script defer=\"defer\">" +
" function ledSwitch() {" +
" var name = document.getElementById(\"wifiname\").value;"+
" var psw = document.getElementById(\"wifipwd\").value;"+
" var xmlhttp;" +
" if (window.XMLHttpRequest) {" +
" xmlhttp = new XMLHttpRequest();" +
" } else {" +
" xmlhttp = new ActiveXObject(\"Microsoft.XMLHTTP\");" +
" }" +
" xmlhttp.onreadystatechange = function () {" +
" if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {" +
" document.getElementById(\"txtState\").innerHTML = xmlhttp.responseText;" +
" }" +
" }," +
" xmlhttp.open(\"GET\", \"Switch\"+name+psw, true);" +
" xmlhttp.send(); " +
" }" +
" </script>" +
"</head>" +
"<body>" "<h3>连接WIFI:</h3>"+ "<form action=\"\"> "+
"WIFI账号: <input type=\"text\" id=\"wifiname\" />"+
"</form>"+ "<form action=\"\"> "+
"WIFI密码: <input type=\"text\" id=\"wifipwd\" />"+
"</form>"+ "<button type=\"button\" onclick=\"ledSwitch()\"> 连接 </button>"+ "<p>状态消息: <span id=\"txtState\"></span></p> "+ "</body>" +
"</html>";bool isLedTurnOpen = false; // 记录LED状态void setup()
{
pinMode(D4, OUTPUT);
digitalWrite(D4, 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(D4, LOW); // 点亮LED
client.print("LED has been turn on");
isLedTurnOpen = true;
}
else
{
digitalWrite(D4, 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 = "";
}
}