Ok, more information. If I use the "Blink" code to get LED13 to blink the windows appear and work just fine. I'm now wondering if it has something to do with anything unique about my code or if, for some reason, the Ethernet library is not supported. Here's my code:
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 1, 254);
EthernetServer server(80);
String HTTP_req;
boolean LED_status = 0;
void setup()
{
Ethernet.begin(mac, ip);
server.begin();
//Serial.begin(9600);
pinMode(31, OUTPUT);
}
void loop()
{
EthernetClient client = server.available();
if (client) {
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
HTTP_req += c;
if (c == '\n' && currentLineIsBlank) {
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close");
client.println();
client.println("<!DOCTYPE html>");
client.println("<html>");
client.println("<head>");
client.println("<title>Rich's LED Control</title>");
client.println("</head>");
client.println("<body>");
client.println("<h1>LED</h1>");
client.println("<p>Click to switch an LED on and off.</p>");
client.println("<form method=\"get\">");
ProcessCheckbox(client, 31);
client.println("</form>");
client.println("</body>");
client.println("</html>");
//Serial.print(HTTP_req);
HTTP_req = "";
break;
}
if (c == '\n') {
currentLineIsBlank = true;
}
else if (c != '\r') {
currentLineIsBlank = false;
}
}
}
delay(1);
client.stop();
}
}
void ProcessCheckbox(EthernetClient cl, int LEDnum)
{
if (HTTP_req.indexOf("LED" + String(LEDnum) + "=2") > -1) {
if (LED_status) {
LED_status = 0;
}
else {
LED_status = 1;
}
}
if (LED_status) {
digitalWrite(LEDnum, HIGH);
cl.println("<input type=\"checkbox\" name=\"LED" + String(LEDnum) + "\" value=\"2\" \
onclick=\"submit();\" checked>LED" + String(LEDnum));
}
else {
digitalWrite(LEDnum, LOW);
cl.println("<input type=\"checkbox\" name=\"LED" + String(LEDnum) + "\" value=\"2\" \
onclick=\"submit();\">LED" + String(LEDnum));
}
}
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