What character? The only thing you are sending is the header and the index.htm file. Are you certain the file opened? Try the error checking I suggested above.
I use the Mega, w5100, and SD together and they all work fine.
edit: The character isn't the "funny y", is it? This character: ÿ
Maybe. It could also be the file contents are corrupt. Replace that SD file read with a standard "Got it!" message.
client.println("Content-Type: text/html");
client.println("Connection: keep-alive");
client.println();
client.println("<html><body>Got it!</body></html>");
// then comment out the SD.open()
If that works, you might want to try just a file read sketch to test the index.htm file and contents. See if you can get it to display on the serial monitor.
If you are using a Mega, you should not be running out of SRAM, but that would also produce that result. If you are using an Uno R3, you may be running out of SRAM. Try the F() function to reduce your SRAM use. Like this:
client.println(F("Content-Type: text/html"));
client.println(F("Connection: keep-alive\r\n"));
// I put the \r\n in the send above so it goes in that packet.
client.println(F("<html><body>Got it!</body></html>"));
#include <SD.h>
// On the Ethernet Shield, CS is pin 4. Note that even if it's not
// used as the CS pin, the hardware CS pin (10 on most Arduino boards,
// 53 on the Mega) must be left as an output or the SD library
// functions will not work.
const int chipSelect = 4;
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.print("Initializing SD card...");
// make sure that the default chip select pin is set to
// output, even if you don't use it:
pinMode(10, OUTPUT);
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {
Serial.println("Card failed, or not present");
// don't do anything more:
return;
}
Serial.println("card initialized.");
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
File dataFile = SD.open("index.htm");
// if the file is available, write to it:
if (dataFile) {
while (dataFile.available()) {
Serial.write(dataFile.read());
}
dataFile.close();
}
// if the file isn't open, pop up an error:
else {
Serial.println("error opening datalog.txt");
}
}
void loop()
{
}
i got all the file in the serial
Initializing SD card...card initialized.
<!DOCTYPE html>
<html>
<head>
<title>Arduino Ajax I/O</title>
<script>
strLED1 = "";
strLED2 = "";
strLED3 = "";
strLED4 = "";
var LED3_state = 0;
var LED4_state = 0;
function GetArduinoIO()
{
nocache = "&nocache=" + Math.random() * 1000000;
var request = new XMLHttpRequest();
request.onreadystatechange = function()
{
if (this.readyState == 4) {
if (this.status == 200) {
if (this.responseXML != null) {
// XML file received - contains analog values, switch values and LED states
var count;
// get analog inputs
var num_an = this.responseXML.getElementsByTagName('analog').length;
for (count = 0; count < num_an; count++) {
document.getElementsByClassName("analog")[count].innerHTML =
this.responseXML.getElementsByTagName('analog')[count].childNodes[0].nodeValue;
}
// get switch inputs
var num_an = this.responseXML.getElementsByTagName('switch').length;
for (count = 0; count < num_an; count++) {
document.getElementsByClassName("switches")[count].innerHTML =
this.responseXML.getElementsByTagName('switch')[count].childNodes[0].nodeValue;
}
// LED 1
if (this.responseXML.getElementsByTagName('LED')[0].childNodes[0].nodeValue === "checked") {
document.LED_form.LED1.checked = true;
}
else {
document.LED_form.LED1.checked = false;
}
// LED 2
if (this.responseXML.getElementsByTagName('LED')[1].childNodes[0].nodeValue === "checked") {
document.LED_form.LED2.checked = true;
}
else {
document.LED_form.LED2.checked = false;
}
// LED 3
if (this.responseXML.getElementsByTagName('LED')[2].childNodes[0].nodeValue === "on") {
document.getElementById("LED3").innerHTML = "LED 3 is ON (D8)";
LED3_state = 1;
}
else {
document.getElementById("LED3").innerHTML = "LED 3 is OFF (D8)";
LED3_state = 0;
}
// LED 4
if (this.responseXML.getElementsByTagName('LED')[3].childNodes[0].nodeValue === "on") {
document.getElementById("LED4").innerHTML = "LED 4 is ON (D9)";
LED4_state = 1;
}
else {
document.getElementById("LED4").innerHTML = "LED 4 is OFF (D9)";
LED4_state = 0;
}
}
}
}
}
// send HTTP GET request with LEDs to switch on/off if any
request.open("GET", "ajax_inputs" + strLED1 + strLED2 + strLED3 + strLED4 + nocache, true);
request.send(null);
setTimeout('GetArduinoIO()', 1000);
strLED1 = "";
strLED2 = "";
strLED3 = "";
strLED4 = "";
}
// service LEDs when checkbox checked/unchecked
function GetCheck()
{
if (LED_form.LED1.checked) {
strLED1 = "&LED1=1";
}
else {
strLED1 = "&LED1=0";
}
if (LED_form.LED2.checked) {
strLED2 = "&LED2=1";
}
else {
strLED2 = "&LED2=0";
}
}
function GetButton1()
{
if (LED3_state === 1) {
LED3_state = 0;
strLED3 = "&LED3=0";
}
else {
LED3_state = 1;
strLED3 = "&LED3=1";
}
}
function GetButton2()
{
if (LED4_state === 1) {
LED4_state = 0;
strLED4 = "&LED4=0";
}
else {
LED4_state = 1;
strLED4 = "&LED4=1";
}
}
</script>
<style>
.IO_box {
float: left;
margin: 0 20px 20px 0;
border: 1px solid blue;
padding: 0 5px 0 5px;
width: 120px;
}
h1 {
font-size: 120%;
color: blue;
margin: 0 0 10px 0;
}
h2 {
font-size: 85%;
color: #5734E6;
margin: 5px 0 5px 0;
}
p, form, button {
font-size: 80%;
color: #252525;
}
.small_text {
font-size: 70%;
color: #737373;
}
</style>
</head>
<body onload="GetArduinoIO()">
<h1>Arduino Ajax I/O</h1>
<div class="IO_box">
<h2>Analog Inputs</h2>
<p class="small_text">A0 used by Ethernet shield</p>
<p class="small_text">A1 used by Ethernet shield</p>
<p>A2: <span class="analog">...</span></p>
<p>A3: <span class="analog">...</span></p>
<p>A4: <span class="analog">...</span></p>
<p>A5: <span class="analog">...</span></p>
</div>
<div class="IO_box">
<h2>Switch Inputs</h2>
<p class="small_text">D0: used by serial RX</p>
<p class="small_text">D1: used by serial TX</p>
<p>Switch 1 (D2): <span class="switches">...</span></p>
<p>Switch 2 (D3): <span class="switches">...</span></p>
<p class="small_text">D4: used by Ethernet shield</p>
<p>Switch 3 (D5): <span class="switches">...</span></p>
</div>
<div class="IO_box">
<h2>LEDs Using Checkboxes</h2>
<form id="check_LEDs" name="LED_form">
<input type="checkbox" name="LED1" value="0" onclick="GetCheck()" />LED 1 (D6)
<input type="checkbox" name="LED2" value="0" onclick="GetCheck()" />LED 2 (D7)
</form>
</div>
<div class="IO_box">
<h2>LEDs Using Buttons</h2>
<button type="button" id="LED3" onclick="GetButton1()">LED 3 is OFF (D8)</button>
<button type="button" id="LED4" onclick="GetButton2()">LED 4 is OFF (D9)</button>
<p class="small_text">D10 to D13 used by Ethernet shield</p>
</div>
</body>
</html>
i think the problem is when i use ethernet and sd together.
Then I put my money on SRAM depletion. You probably are running out of SRAM. Use the F() function on all your static strings, both Serial and client.
If that doesn't work, then you should check your SRAM use. I use a function freeRam() to check. I call it just before a function call that is failing. Add this freeRam() function to your code and call it just before the SD.open() call. How much does it say you have left?
it seems that the sd is killed. cant read it on the pc, dont know if arduino killed it. i will find another and will try your code. thank you very much for your help!!
I killed my sd card a while back. It failed testing code here on the forum. I forgot to disable or remove the SD card when testing someone's w5100 code, and the format got screwed up.
