#include <EtherCard.h>
#define RELAY_PIN 2
static byte mymac[] = {0xDD,0xDD,0xDD,0x00,0x00,0x01};
static byte myip[] = {192,168,1,2};
byte Ethernet::buffer[700];
char* on = "ON";
char* off = "OFF";
boolean relayStatus;
char* relayLabel;
char* linkLabel;
void setup () {
Serial.begin(57600);
Serial.println("WebRelay Demo");
if(!ether.begin(sizeof Ethernet::buffer, mymac, 10))
Serial.println( "Failed to access Ethernet controller");
else
Serial.println("Ethernet controller initialized");
if (!ether.dhcpSetup())
Serial.println("DHCP failed");
else
Serial.println("DHCP configuration done");
ether.printIp("My IP: ", ether.myip);
// ether.printIp("Netmask: ", ether.mymask);
ether.printIp("GW IP: ", ether.gwip);
ether.printIp("DNS IP: ", ether.dnsip);
pinMode(RELAY_PIN, OUTPUT);
digitalWrite(RELAY_PIN, LOW);
relayStatus = false;
relayLabel = off;
linkLabel = on;
}
void loop() {
word len = ether.packetReceive();
word pos = ether.packetLoop(len);
if(pos) {
if(strstr((char *)Ethernet::buffer + pos, "GET /?ON") != 0) {
relayStatus = true;
relayLabel = on;
linkLabel = off;
} else if(strstr((char *)Ethernet::buffer + pos, "GET /?OFF") != 0) {
relayStatus = false;
relayLabel = off;
linkLabel = on;
}
digitalWrite(RELAY_PIN, relayStatus);
BufferFiller bfill = ether.tcpOffset();
bfill.emit_p(PSTR("HTTP/1.0 200 OK\r\n"
"Content-Type: text/html\r\nPragma: no-cache\r\n\r\n"
"<html><head><meta name='viewport' content='width=200px'/></head><body>"
"<div style='position:absolute;width:200px;height:200px;top:50%;left:50%;margin:-100px 0 0 -100px'>"
"<div style='font:bold 14px verdana;text-align:center'>Relay is $S</div>"
"<br><div style='text-align:center'>"
"<a href='/?$S'><img src='http://www.lucadentella.it/files/bt_$S.png'></a>"
"</div></div></body></html>"
), relayLabel, linkLabel, linkLabel);
ether.httpServerReply(bfill.position());
}
}
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