Arduino IDE for ESP8266 教程(一) 局域网网页查看数据不控制

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烧录时版型和参数选择

测试样例1

说明：

程序输入你要连接的路由器名+密码。
烧录进入wemos d1 mini 板，程序自动连接路由器，并返回自己分配到的地址。
手机或电脑连接在同一个路由器下，打开网页，输入刚才返回的地址，网页看到结果。

1 烧录程序

/*

 * 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;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

 * 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 <ESP8266WiFi.h>

#include <WiFiClient.h>

#include <ESP8266WebServer.h>

#include <ESP8266mDNS.h>

const char *ssid = "dongdong";

const char *password = "dongdong";

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,

"<html>\

  <head>\

    <meta http-equiv='refresh' content='5'/>\

    <title>ESP8266 Demo</title>\

    <style>\

      body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\

    </style>\

  </head>\

  <body>\

    <h1>Hello from ESP8266!</h1>\

    <p>Uptime: %02d:%02d:%02d</p>\

    <img src=\"/test.svg\" />\

  </body>\

</html>",

		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 += "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"400\" height=\"150\">\n";

 	out += "<rect width=\"400\" height=\"150\" fill=\"rgb(250, 230, 210)\" stroke-width=\"1\" stroke=\"rgb(0, 0, 0)\" />\n";

 	out += "<g stroke=\"black\">\n";

 	int y = rand() % 130;

 	for (int x = 10; x < 390; x+= 10) {

 		int y2 = rand() % 130;

 		sprintf(temp, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" stroke-width=\"1\" />\n", x, 140 - y, x + 10, 140 - y2);

 		out += temp;

 		y = y2;

 	}

	out += "</g>\n</svg>\n";

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

}