Los plugins de firefox no tienen iconos estan dentro de "herramientas" - "complementos" o puedes acceder a ellos pulsando ctrl + mays + a
Lo que tu quieres no es para emplear refresco de pagina web, eso es lento, has mirado dentro de la libreria los ejemplos que hay?
Creo que este puede ser lo que buscas:
// A simple web server that always just says "Hello World"
#include "etherShield.h"
#include "ETHER_28J60.h"
static uint8_t mac[6] = {0x54, 0x55, 0x58, 0x10, 0x00, 0x24}; // this just needs to be unique for your network,
// so unless you have more than one of these boards
// connected, you should be fine with this value.
static uint8_t ip[4] = {192, 168, 1, 15}; // the IP address for your board. Check your home hub
// to find an IP address not in use and pick that
// this or 10.0.0.15 are likely formats for an address
// that will work.
static uint16_t port = 80; // Use port 80 - the standard for HTTP
ETHER_28J60 e;
void setup()
{
e.setup(mac, ip, port);
}
void loop()
{
if (e.serviceRequest())
{
e.print("<H1>Analog Values</H1>
<table>");
e.print("<tr><th>Input</th><th>Value</th></tr>");
for (int i = 0; i < 6; i++)
{
e.print("<tr><td>"); e.print(i); e.print("</td><td>"); e.print(analogRead(i)); e.print("</td></tr>");
}
e.print("</table>");
e.respond();
}
delay(100);
}
Obviamente, cambiandolo a tu gusto.
Mira a ver...
Yo buscare tambien algo de info sobre envio de datos por http mas rapido.
Un saludo