[wiki:wade/embedded/arduino 回到 Arduino]
{{{
#!c

/*
 * Web Admin 透過 web service 提供網頁監控功能。
 * 接法：
 * analog pin1：CT sersor
 * 
 */

#include <Ethernet.h>
//#include <string.h>

byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 
  192, 168, 1, 240 };

Server server(80);

void setup()
{
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.begin(9600);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
}

void loop()
{
  Client client = server.available();
  // detect if current is the first line
  boolean current_line_is_first = true;
  // command code
  char command[3] = "\0";
  if (client) {
    // an http request ends with a blank line
    boolean current_line_is_blank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        // if we've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so we can send a reply
        if (c == '\n' && current_line_is_blank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println();

          // output the value of each analog input pin
          for (int i = 0; i < 6; i++) {
            client.print("analog input ");
            client.print(i);
            client.print(" is ");
            client.print(analogRead(i));
            client.println("<br />");
          }
          client.println("<form  method=get name=form>");
          client.println("<button name=b value=01 type=submit>01</button>");
          client.println("<button name=b value=02 type=submit>02</button>");
          client.println("<button name=b value=03 type=submit>03</button>");
          client.println("<button name=b value=04 type=submit>04</button>");            
          client.println("</form>");
          break;
        }
        if (c == '\n') {
          // we're starting a new line
          current_line_is_first = false;
          current_line_is_blank = true;
        } 
        else if (c != '\r') {
          // we've gotten a character on the current line
          current_line_is_blank = false;
        }
        // get the first http request
        if (current_line_is_first && c == '=')
        {
          for (int i = 0; i < 2; i++)
          {
            c = client.read();
            command[i] = c;
          }
          if (!strcmp(command, "01") )
          {
            Serial.println("high pin 2");
            digitalWrite(2, HIGH);
            delay(500);
            digitalWrite(2, LOW);
          }
          if (!strcmp(command, "02") )
          {
            Serial.println("high pin 3");
            digitalWrite(3, HIGH);
            delay(500);
            digitalWrite(3, LOW);
          }
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
    client.stop();
  }
}
}}}