#include "etherShield.h"
#include "ETHER_28J60.h"
static uint8_t mac[6] = {0x54, 0x55, 0x58, 0x10, 0x00, 0x24};
static uint8_t ip[4] = {10, 10, 0, 115};
static uint16_t port = 80;
ETHER_28J60 e;
int AC_pin = 10;           //Pin to MOC3020 - OptoTriac
byte dim = 0;              //Initial brightness level from 0 to 255, change as you like!

void setup() {
  Serial.begin(9600);
  pinMode(AC_pin, OUTPUT);
  attachInterrupt(0, light, FALLING);//When arduino Pin 2 is FALLING from HIGH to LOW, run light procedure!
  e.setup(mac, ip, port);
}

void light() {
  if (Serial.available()) {
    dim = Serial.read();
    new_triac_value();
  }
  if (dim > 0 && dim < 255) {      //Dimming part, if dim is not 0 and not 255
    delayMicroseconds(34*(255-dim));
    triac_on();
    delayMicroseconds(500);
    triac_off();
  }
}

void new_triac_value() {
  if (dim < 1) {                  //Turn TRIAC completly OFF if dim is 0
    triac_off();
  }
  if (dim > 254) {                //Turn TRIAC completly ON if dim is 255
    triac_on();
  } 
}

void triac_off() {
  digitalWrite(AC_pin, LOW);
}

void triac_on() {
  digitalWrite(AC_pin, HIGH);  
}

void loop() {
  char* params;
  String ndim;
  if (params = e.serviceRequest()) {
    if (strstr(params, "?dim=") != 0) {
      ndim = String(params);
      ndim.replace("?dim=","");
      dim = ndim.toInt();
      new_triac_value();
    }
    e.print("<H1>DIM level: ");
    e.print(dim);
    e.print(" </H1><br><form METHOD=get><input type=\"range\" name=\"dim\" min=\"0\" max=\"255\" value=\"");
    e.print(dim);
    e.print("\"/><input type=submit value=\"Set\"></form>");
    e.respond();
  }
}