#include <EtherCard.h>
#define RELAY_PIN 2
static byte mymac[] = {0xDD,0xDD,0xDD,0x00,0x00,0x01};
static byte myip[] = {10,0,1,186};
byte Ethernet::buffer[700];
static uint32_t timer[3];
char til[4];
char rel[2];
byte repin[] = {2,3,4};
byte reon[] = {1,0,0};
byte reoff[] = {0,1,1};
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))
Serial.println( "Failed to access Ethernet controller");
else
Serial.println("Ethernet controller initialized");
if(!ether.staticSetup(myip))
Serial.println("Failed to set IP address");
pinMode(repin[0], OUTPUT);
digitalWrite(repin[0], reoff[0]);
pinMode(repin[1], OUTPUT);
digitalWrite(repin[1], reoff[1]);
pinMode(repin[2], OUTPUT);
digitalWrite(repin[2], reoff[2]);
relayStatus = false;
relayLabel = off;
linkLabel = on;
timer[0] = millis() + 5000;
}
void loop() {
word len = ether.packetReceive();
word pos = ether.packetLoop(len);
if (millis() > timer[0]) {
digitalWrite(repin[0], reoff[0]);
}
if (millis() > timer[1]) {
digitalWrite(repin[1], reoff[1]);
}
if (millis() > timer[2]) {
digitalWrite(repin[2], reoff[2]);
}
if(pos) {
char* data = (char *) Ethernet::buffer + pos;
Serial.println(data);
ether.findKeyVal(data + 6, rel , sizeof rel , "relay");
byte rela = atoi(rel);
Serial.println(rel);
if(strstr(data, "GET /?status=ON") != 0) {
ether.findKeyVal(data + 6, til , sizeof til , "til");
Serial.print("Will stay on for ");
Serial.print(til);
Serial.println( " minutes.\n");
Serial.println(freeRAM());
int until = atoi(til);
//Serial.println(until);
timer[rela] = millis() + until*60000;
relayStatus = reon[rela];
relayLabel = on;
linkLabel = off;
} else if(strstr(data, "GET /?status=OFF") != 0) {
relayStatus = reoff[rela];
relayLabel = off;
linkLabel = on;
}
digitalWrite(repin[rela], 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 $S</div>"
"<br><div style='text-align:center'>"
"<a href='/?status=$S'><img src='http://www.lucadentella.it/files/bt_$S.png'></a>"
"</div></div></body></html>"
), relayLabel, linkLabel, linkLabel);
ether.httpServerReply(bfill.position());
}
}
int freeRAM(){
extern int __heap_start, *__brkval;
int v;
return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval);
}