#include
#include
#include
#include
#include
int porta_rele = 9; //Rele ligado a porta 9 do arduino

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 192, 168, 0, 100 };
IPAddress pingAddr(192,168,0,1); // ip address to ping

SOCKET pingSocket = 0;

char buffer [256];
ICMPPing ping(pingSocket, (uint16_t)random(0, 255));

EthernetServer server(80);

String readString;
int Pin = 9;

void setup(){
  pinMode(Pin, OUTPUT);
  Ethernet.begin(mac, ip);
  server.begin();
  Serial.begin(9600);
}

void loop(){
  ICMPEchoReply echoReply = ping(pingAddr, 4);
  if (echoReply.status == SUCCESS)
  {
   sprintf(buffer,"Reply[%d] from: %d.%d.%d.%d: bytes=%d time=%ldms TTL=%d",
            echoReply.data.seq,
            echoReply.addr[0],
            echoReply.addr[1],
            echoReply.addr[2],
            echoReply.addr[3],
            REQ_DATASIZE,
            millis() - echoReply.data.time,
            echoReply.ttl);

  //Aguarda 2 segundo e repete o processo
  delay (2000);
  }
  else
  {
    sprintf(buffer, "Echo request failed; %d", echoReply.status);
    digitalWrite(porta_rele,HIGH); //Liga o led vermelho
    Serial.println(" REINICIANDO EQUIPAMENTOS ");
    delay(5000);
    digitalWrite(porta_rele,LOW); // Desliga o led
  }

  EthernetClient client = server.available();
  if (client) {
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();

        if (readString.length() < 100) {
          readString += c;
        }

        if (c == '\n') {
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println();

          client.println("");
          client.println("");
          client.println("Acende LED");
          client.println("");
          client.println("");

          client.println("<a>Ligar o led</a>");
          client.println("<a>Desligar o led</a>");

          client.println("");
          client.println("");

          delay(1);
          client.stop();

          if(readString.indexOf("?ledon") &gt; 0)
          {
            digitalWrite(Pin, HIGH);
          }
          else {
            if(readString.indexOf("?ledoff") &gt; 0)
            {
              digitalWrite(Pin, LOW);
            }
          }
          readString="";
        }
      }
    }
  }
  delay(1000);
  Serial.println(buffer);
 delay(5000); // Tempo para liga o radio

}