web server stop working

Hi guys!

When i compile my web server in the IDE of arduino, for 1 second the web server work perfectly.
This is my sketch:

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

// MAC address from Ethernet shield sticker under board
byte mac = { 0x90, 0xAD, 0xDA, 0x0D, 0xBB, 0x29 };
IPAddress ip(192, 168, 1, 190); // IP address, may need to change depending on network
EthernetServer server(80); // create a server at port 80

String HTTP_req; // stores the HTTP request
boolean LED_status = 0; // state of LED, off by default

void setup()
{
Ethernet.begin(mac, ip); // initialize Ethernet device
server.begin(); // start to listen for clients
Serial.begin(9600); // for diagnostics
pinMode(2, OUTPUT); // LED on pin 2
}

void loop()
{
EthernetClient client = server.available(); // try to get client

if (client) { // got client?
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) { // client data available to read
char c = client.read(); // read 1 byte (character) from client
HTTP_req += c; // save the HTTP request 1 char at a time
// last line of client request is blank and ends with \n
// respond to client only after last line received
if (c == ‘\n’ && currentLineIsBlank) {
// send a standard http response header
client.println(“HTTP/1.1 200 OK”);
client.println(“Content-Type: text/html”);
client.println(“Connection: close”);
client.println();
// send web page
client.println("");
client.println("");
client.println("");
client.println(“Arduino LED Control”);
client.println("");
client.println("");
client.println(“

LED

”);
client.println(“

Click to switch LED on and off.

”);
client.println("<form method=“get”>");
ProcessCheckbox(client);
client.println("");
client.println("");
client.println("");
Serial.print(HTTP_req);
HTTP_req = “”; // finished with request, empty string
break;
}
// every line of text received from the client ends with \r\n
if (c == ‘\n’) {
// last character on line of received text
// starting new line with next character read
currentLineIsBlank = true;
}
else if (c != ‘\r’) {
// a text character was received from client
currentLineIsBlank = false;
}
} // end if (client.available())
} // end while (client.connected())
delay(1); // give the web browser time to receive the data
client.stop(); // close the connection
} // end if (client)
}

// switch LED and send back HTML for LED checkbox
void ProcessCheckbox(EthernetClient cl)
{
if (HTTP_req.indexOf(“LED2=2”) > -1) { // see if checkbox was clicked
// the checkbox was clicked, toggle the LED
if (LED_status) {
LED_status = 0;
}
else {
LED_status = 1;
}
}

if (LED_status) { // switch LED on
digitalWrite(2, HIGH);
// checkbox is checked
cl.println("<input type=“checkbox” name=“LED2” value=“2”
onclick=“submit();” checked>LED2");
}
else { // switch LED off
digitalWrite(2, LOW);
// checkbox is unchecked
cl.println("<input type=“checkbox” name=“LED2” value=“2”
onclick=“submit();”>LED2");
}
}

When i have finish the compiled the web server work, but after few seconds the server stops Responding and Error . I must then recompile the server and works again for a few seconds .

I also tried with the sketch example of the web server , and there is the same error . Can anyone help ?

Server web page test code that runs for quite a while. You can try to see if it runs ok on your setup.

// zoomkat's meta refresh data frame test page 5/25/13
// use http://192.168.1.102:84 in your brouser for main page
// http://192.168.1.102:84/data static data page
// http://192.168.1.102:84/datastart meta refresh data page
// for use with W5100 based ethernet shields
// set the refresh rate to 0 for fastest update
// use STOP for single data updates

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

const int analogInPin0 = A0;
const int analogInPin1 = A1;
const int analogInPin2 = A2;
const int analogInPin3 = A3;
const int analogInPin4 = A4;
const int analogInPin5 = A5;

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //physical mac address
byte ip[] = { 192, 168, 1, 102 }; // arduino ip in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
EthernetServer server(84); //server port
unsigned long int x=0; //set refresh counter to 0
String readString; 

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

void setup(){
  Serial.begin(9600);
    // disable SD SPI if memory card in the uSD slot
  pinMode(4,OUTPUT);
  digitalWrite(4,HIGH);

  Ethernet.begin(mac, ip, gateway, gateway, subnet);
  server.begin();
  Serial.println("meta refresh data frame test 5/25/13"); // so I can keep track of what is loaded
}

void loop(){
  EthernetClient client = server.available();
  if (client) {
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
         if (readString.length() < 100) {
          readString += c; 
         } 
        //check if HTTP request has ended
        if (c == '\n') {

          //check get atring received
          Serial.println(readString);

          //output HTML data header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println();

          //generate data page
          if(readString.indexOf("data") >0) {  //checks for "data" page
            x=x+1; //page upload counter
            client.print("<HTML><HEAD>");
            //meta-refresh page every 1 seconds if "datastart" page
            if(readString.indexOf("datastart") >0) client.print("<meta http-equiv='refresh' content='1'>"); 
            //meta-refresh 0 for fast data
            if(readString.indexOf("datafast") >0) client.print("<meta http-equiv='refresh' content='0'>"); 
            client.print("<title>Zoomkat's meta-refresh test</title></head><BODY>
");
            client.print("page refresh number: ");
            client.print(x); //current refresh count
            client.print("

");
            
              //output the value of each analog input pin
            client.print("analog input0 is: ");
            client.print(analogRead(analogInPin0));
            
            client.print("
analog input1 is: ");
            client.print(analogRead(analogInPin1));
                        
            client.print("
analog input2 is: ");
            client.print(analogRead(analogInPin2));
            
            client.print("
analog input3 is: ");
            client.print(analogRead(analogInPin3));
                                    
            client.print("
analog input4 is: ");
            client.print(analogRead(analogInPin4));
            
            client.print("
analog input5 is: ");
            client.print(analogRead(analogInPin5));
            client.println("
</BODY></HTML>");
           }
          //generate main page with iframe
          else
          {
            client.print("<HTML><HEAD><TITLE>Zoomkat's frame refresh test</TITLE></HEAD>");
            client.print("Zoomkat's Arduino frame meta refresh test 5/25/13");
            client.print("

Arduino analog input data frame:
");
            client.print("&nbsp;&nbsp;<a href='http://192.168.1.102:84/datastart' target='DataBox' title=''yy''>META-REFRESH</a>");
            client.print("&nbsp;&nbsp;&nbsp;&nbsp;<a href='http://192.168.1.102:84/data' target='DataBox' title=''xx''>SINGLE-STOP</a>");
            client.print("&nbsp;&nbsp;&nbsp;&nbsp;<a href='http://192.168.1.102:84/datafast' target='DataBox' title=''zz''>FAST-DATA</a>
");
            client.print("<iframe src='http://192.168.1.102:84/data' width='350' height='250' name='DataBox'>");
            client.print("</iframe>
</HTML>");
          }
          delay(1);
          //stopping client
          client.stop();
          //clearing string for next read
          readString="";
        }
      }
    }
  }
}

Maybe you are running out of SRAM. Use the F() function with all your static strings.
client.println(F("HTTP/1.0 200 OK"));

Cross posted http://forum.arduino.cc/index.php?topic=309287

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