Hi, i want to do a webserver whit 5 pages, i used a example code and it works, i can enter to the main page then open other, but the problem is that after open pages for a few times it start to load slow or dont open the page, then start to work correctly again,this always happen andt i dont know if is problem whit the code or my arduino/ethernet shield, i would apreciate if someone can help me to know what happen, thanks.
Code:
/*--------------------------------------------------------------
Program: eth_websrv_SD_linkDescription: Arduino web server that serves up a basic web
page that links to a second page. Clicking the
link will open the second page. The second page
links back to the first page.Hardware: Arduino Uno and official Arduino Ethernet
shield. Should work with other Arduinos and
compatible Ethernet shields.
2Gb micro SD card formatted FAT16Software: Developed using Arduino 1.0.3 software
Should be compatible with Arduino 1.0 +Requires index.htm and page2.htm to be on the
micro SD card in the Ethernet shield micro
SD card socket.References: - WebServer example by David A. Mellis and
modified by Tom Igoe
- SD card examples by David A. Mellis and
Tom Igoe- Ethernet library documentation:
Ethernet - Arduino Reference- SD Card library documentation:
SD - Arduino ReferenceDate: 2 March 2013
Author: W.A. Smith, http://startingelectronics.com
--------------------------------------------------------------*/#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>// MAC address from Ethernet shield sticker under board
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(10, 0, 0, 20); // IP address, may need to change depending on network
EthernetServer server(80); // create a server at port 80File webFile;
String HTTP_req = ""; // stores the received HTTP request
void setup()
{
Ethernet.begin(mac, ip); // initialize Ethernet device
server.begin(); // start to listen for clients
Serial.begin(9600); // for debugging// initialize SD card
Serial.println("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("ERROR - SD card initialization failed!");
return; // init failed
}
Serial.println("SUCCESS - SD card initialized.");
// check for index.htm file
if (!SD.exists("index.htm")) {
Serial.println("ERROR - Can't find index.htm file!");
return; // can't find index file
}
Serial.println("SUCCESS - Found index.htm file.");
}void loop()
{
EthernetClient client = server.available(); // try to get clientif (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 HTTP request character
Serial.print(c); // print HTTP request character to serial monitor
// 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("Connnection: close");
client.println();
// send web page
if ((HTTP_req.indexOf("GET / ") > -1)
|| (HTTP_req.indexOf("GET /index.htm") > -1)) {
webFile = SD.open("index.htm"); // open web page file
}
else if (HTTP_req.indexOf("GET /page2.htm") > -1) {
webFile = SD.open("page2.htm"); // open web page file
}
if (webFile) {
while(webFile.available()) {
client.write(webFile.read()); // send web page to client
}
webFile.close();
}
HTTP_req = ""; // empty the 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)
}
