#include <Arduino.h>
#include <SPI.h>
#include <Ethernet.h>
#include <PubSubClient.h>

byte mac[] = { 0xa8, 0x61, 0x0a, 0x50, 0x46, 0x2f };
EthernetClient ethernetClient;
PubSubClient mqttClient(ethernetClient);

void setup()
{
  Serial.begin(115200);
  while (!Serial)
  {
    digitalWrite(LED_D0, 1);
    delay(250);
    digitalWrite(LED_D0, 0);
    delay(250);
  }
  digitalWrite(LED_D0, 1);

  Serial.println("Connecting to Ethernet");
  Ethernet.begin(mac);
  Serial.print("ETH IP: ");
  Serial.print(Ethernet.localIP());
  Serial.print("    dnsServerIP: ");
  Serial.println(Ethernet.dnsServerIP());
  digitalWrite(LED_D1, 1);

  delay(2000);
  mqttClient.setServer("valid_hostname", 1883);
  while (!mqttClient.connect("opta", "user", "pass"))
  {
    Serial.print("ETH: Status: ");
    Serial.println(Ethernet.status());
    if (mqttClient.state() < 0)
    {
      delay(2000);
      Serial.print("MQTT: Looping State: ");
      Serial.println(mqttClient.state());
    }
  }
  Serial.println("MQTT: Connected");
  digitalWrite(LED_D2, 1);
}

void loop () {
  delay(2000);
  digitalWrite(LED_D3, 1);
  Serial.print("[");
  Serial.print(millis());
  Serial.print("] ");
  Serial.print("ETH IP: ");
  Serial.print(Ethernet.localIP());
  Serial.print("    dnsServerIP: ");
  Serial.print(Ethernet.dnsServerIP());
  Serial.print("    dnsIP: ");
  Serial.println(Ethernet.dnsIP());
  delay(2000);
  digitalWrite(LED_D3, 0);
}