First of all, I'm not new to the Arduino, I've made some (advanced) projects before.
Anyways, I have the Ethernet Shield w/ SD Card and am currently using it as a web server. I was wondering if I could have the Arduino display HTML files that are already on the SD card rather then needing to type in all the HTML in the Arduino itself.
If you would like to see my code, which is currently a little messy, here:
/*
* local url is http://192.168.1.80:8080/
*/
#include <SPI.h>
#include <SdFat.h>
#include <SdFatUtil.h>
#include <Ethernet.h>
#define greenLEDpin 8
#define redLEDpin 9
boolean led2 = true;
int hits = 0;
int count =0;
/************ ETHERNET STUFF ************/
byte mac[] = {
0x90, 0xA2, 0xDA, 0x00, 0x1C, 0x0E };
byte ip[] = {
192, 168, 1, 80 };
Server server(8080);
/************ SDCARD STUFF ************/
Sd2Card card;
SdVolume volume;
SdFile root;
SdFile file;
#define error(s) error_P(PSTR(s))
void error_P(const char* str) {
PgmPrint("error: ");
SerialPrintln_P(str);
if (card.errorCode()) {
PgmPrint("SD error: ");
Serial.print(card.errorCode(), HEX);
Serial.print(',');
Serial.println(card.errorData(), HEX);
}
while(1);
}
void setup() {
Serial.begin(9600);
pinMode(greenLEDpin, OUTPUT);
pinMode(redLEDpin, OUTPUT);
PgmPrint("Free RAM: ");
Serial.println(FreeRam());
pinMode(10, OUTPUT);
digitalWrite(10, HIGH);
if (!card.init(SPI_FULL_SPEED, 4)) error("card.init failed!");
if (!volume.init(&card)) error("vol.init failed!");
PgmPrint("Volume is FAT");
Serial.println(volume.fatType(),DEC);
Serial.println();
if (!root.openRoot(&volume)) error("openRoot failed");
PgmPrintln("Files found in root:");
root.ls(LS_DATE | LS_SIZE);
Serial.println();
PgmPrintln("Files found in all dirs:");
root.ls(LS_R);
Serial.println();
PgmPrintln("Done");
Ethernet.begin(mac, ip);
server.begin();
}
void ListFiles(Client client, uint8_t flags) {
dir_t p;
root.rewind();
client.println("<ul>");
while (root.readDir(p) > 0) {
if (p.name[0] == DIR_NAME_FREE) break;
if (p.name[0] == DIR_NAME_DELETED || p.name[0] == '.') continue;
if (!DIR_IS_FILE_OR_SUBDIR(&p)) continue;
client.print("<li><a href=\"");
for (uint8_t i = 0; i < 11; i++) {
if (p.name[i] == ' ') continue;
if (i == 8) {
client.print('.');
}
client.print(p.name[i]);
}
client.print("\">");
for (uint8_t i = 0; i < 11; i++) {
if (p.name[i] == ' ') continue;
if (i == 8) {
client.print('.');
}
client.print(p.name[i]);
}
client.print("</a>");
if (DIR_IS_SUBDIR(&p)) {
client.print('/');
}
if (flags & LS_DATE) {
root.printFatDate(p.lastWriteDate);
client.print(' ');
root.printFatTime(p.lastWriteTime);
}
if (!DIR_IS_SUBDIR(&p) && (flags & LS_SIZE)) {
client.print(' ');
client.print(p.fileSize);
}
client.println("</li>");
}
client.println("</ul>");
}
#define BUFSIZ 1024
void loop()
{
// this is red LED blink
if(count >=500)
{
led2 = !led2;
digitalWrite(redLEDpin, led2);
count = 0;
}
count +=1;
// end red LED blink
char clientline[BUFSIZ];
int index = 0;
Client client = server.available();
if (client) {
boolean current_line_is_blank = true;
index = 0;
while (client.connected()) {
if (client.available()) {
char c = client.read();
if (c != '\n' && c != '\r') {
clientline[index] = c;
index++;
if (index >= BUFSIZ)
index = BUFSIZ -1;
continue;
}
clientline[index] = 0;
Serial.println(clientline);
if (strstr(clientline, "GET / ") != 0) {
/**************** Main page HTML starts here.*****************/
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html; charset=UTF-8");
client.println();
client.println("<html>");
client.println("<head>");
client.println("<title>Arduino WebServer</title>");
client.println("</head>");
client.println("<body>");
client.println("
");
client.println("<B>Hello World!!</B>");
client.println("
");
client.println("
");
hits ++;
client.print("Hits: ");
client.print(hits);
client.println("</body>");
/**************** Main page HTML ends here.*****************/
}
else if (strstr(clientline, "GET /") != 0) {
char *filename;
filename = clientline + 5;
(strstr(clientline, " HTTP"))[0] = 0;
Serial.println(filename);
if (! file.open(&root, filename, O_READ)) {
client.println("HTTP/1.1 404 Not Found");
client.println("Content-Type: text/html");
client.println();
client.println("<h2>Error 404</h2>");
client.println("<s2>You know what that means...<s2>");
client.println("");
break;
}
Serial.println("Opened!");
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/plain");
client.println();
int16_t c;
while ((c = file.read()) > 0) {
client.print((char)c);
}
file.close();
}
else {
client.println("HTTP/1.1 404 Not Found");
client.println("Content-Type: text/html");
client.println();
client.println("<h2>Error 404</h2>");
client.println("<s2>You know what that means...<s2>");
client.println("");
}
break;
}
}
digitalWrite(greenLEDpin, HIGH);
delay(1);
digitalWrite(greenLEDpin, LOW);
client.stop();
}
}
FYI, I'm using Arduino UNO with the Arduino Ethernet Shield (W5100)
