esp8266 webserver 研究

参考网页：
https://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/server-examples.html

代码：

#include 

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

WiFiServer server(80);


void setup()
{
    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());
}


// prepare a web page to be send to a client (web browser)
String prepareHtmlPage()
{
    String htmlPage =
        String("HTTP/1.1 200 OK\r\n") +
        "Content-Type: text/html\r\n" +
        "Connection: close\r\n" +  // the connection will be closed after completion of the response
        "Refresh: 5\r\n" +  // refresh the page automatically every 5 sec
        "\r\n" +
        "" +
        "" +
        "Analog input:  " + String(analogRead(A0)) +
        "" +
"\r\n";
return htmlPage;
}
void loop()
{
WiFiClient client = server.available();
// wait for a client (web browser) to connect
if (client)
{
Serial.println("\n[Client connected]");
while (client.connected())
{
// read line by line what the client (web browser) is requesting
if (client.available())
{
String line = client.readStringUntil('\r');
Serial.print(line);
Serial.print("\r\nHHHHH \r\n");
// wait for end of client's request, that is marked with an empty line
if (line.length() == 1 && line[0] == '\n')
{
Serial.print("\r\nAAAAA \r\n");
client.println(prepareHtmlPage());
break;
}
}
}
delay(500); // give the web browser time to receive the data
// close the connection:
client.stop();
Serial.println("[Client disonnected]");
}
}