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Topic: Both server and client working together (Read 771 times) previous topic - next topic

jmaxado

Hello to you all
I have search the web for the answer for thios question.
Ihave a project running smoth where and arduino mega is reading sensor values and using an php file writing them to a mysql server in my network.
But now I need the same board to control an infrared sensor to act as an remot control. For this I need the board to act as a client do writ the values from the sensors.
But also as a server so that I can send comands for the infrared led.
Is it possible to have arduino to act both as a client and a server ?
I am using arduino mega together with the oficial ethernet board.

Thank You

José
Portugal

zoomkat

Old client/server code you will need to update to the current IDE specifications and your board.

Code: [Select]
//zoomkat 11-25-11
//simple button GET with iframe code
//for use with IDE 0021
//open serial monitor and send an e to test client and
//open serial monitor to see what the arduino receives
//use the \ slash to escape the " in the html
//address will look like http://192.168.1.102:84/ when submited
//for use with W5100 based ethernet shields

#include <SPI.h>
#include <Ethernet.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
byte ip[] = { 192, 168, 1, 102 }; // ip in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
byte myserver[] = { 208, 104, 2, 86 }; // zoomkat web page
Server server(84); //server port
Client client(myserver, 80);
String readString;

//////////////////////

void setup(){

  pinMode(5, OUTPUT); //pin selected to control
  Ethernet.begin(mac, ip, gateway, subnet);
  server.begin();
  Serial.begin(9600);
  Serial.println("server/client test 11/25/11"); // so I can keep track of what is loaded
}

void loop(){
  // check for serial input
  if (Serial.available() > 0)
  {
    byte inChar;
    inChar = Serial.read();
    if(inChar == 'e')
    {
      sendGET(); // call sendGET function
    }
  } 

  Client client = server.available();
  if (client) {
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();

        //read char by char HTTP request
        if (readString.length() < 100) {

          //store characters to string
          readString += c;
          //Serial.print(c);
        }

        //if HTTP request has ended
        if (c == '\n') {

          ///////////////
          Serial.println(readString); //print to serial monitor for debuging

            //now output HTML data header
          if(readString.indexOf('?') >=0) { //don't send new page
            client.println("HTTP/1.1 204 Zoomkat");
            client.println();
            client.println(); 
          }
          else {
            client.println("HTTP/1.1 200 OK"); //send new page
            client.println("Content-Type: text/html");
            client.println();

            client.println("<HTML>");
            client.println("<HEAD>");
            client.println("<TITLE>Arduino GET test page</TITLE>");
            client.println("</HEAD>");
            client.println("<BODY>");

            client.println("<H1>Zoomkat's simple Arduino button</H1>");

            client.println("<a href=\"/?on\" target=\"inlineframe\">ON</a>");
            client.println("<a href=\"/?off\" target=\"inlineframe\">OFF</a>");

            //client.println("<IFRAME name=inlineframe src=\"res://D:/WINDOWS/dnserror.htm\" width=1 height=1\">");
            client.println("<IFRAME name=inlineframe style=\"display:none\" >");         
            client.println("</IFRAME>");

            client.println("</BODY>");
            client.println("</HTML>");
          }

          delay(1);
          //stopping client
          client.stop();

          ///////////////////// control arduino pin
          if(readString.indexOf("on") >0)//checks for on
          {
            digitalWrite(5, HIGH);    // set pin 4 high
            Serial.println("Led On");
          }
          if(readString.indexOf("off") >0)//checks for off
          {
            digitalWrite(5, LOW);    // set pin 4 low
            Serial.println("Led Off");
          }
          //clearing string for next read
          readString="";

        }
      }
    }
  }
}

//////////////////////////
void sendGET() //client function to send/receie GET request data.
{
  if (client.connect()) {
    Serial.println("connected");
    client.println("GET /~shb/arduino.txt HTTP/1.0");
    client.println();
  }
  else {
    Serial.println("connection failed");
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //waits for data
  while (client.connected() || client.available()) { //connected or data available
    char c = client.read();
    Serial.print(c);
  }

  Serial.println();
  Serial.println("disconnecting.");
  Serial.println("==================");
  Serial.println();
  client.stop();

}


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