#include <PubSubClient.h>
#include <ESP8266WiFi.h>
#include <SoftwareSerial.h>
// Update these with values suitable for your network.

//const char* ssid = "Automation";
//const char* password = "1234567890";
const char* ssid = "Office";
const char* password = "Office2018";
const char* mqtt_server = "192.168.16.141";



char msg[50];

WiFiClient espClient;
PubSubClient client(espClient);

byte mac[6];
String MACAddress;



const int LED = D5;

void setup() {
  pinMode(LED, OUTPUT);

  Serial.begin(115200);
  setup_wifi();
  printMACAddress();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

String mac2String(byte ar[]) {
  String s;
  for (byte i = 0; i < 6; ++i)
  {
    char buf[3];
    sprintf(buf, "%2X", ar[i]);
    s += buf;
    if (i < 5) s += ':';
  }
  return s;
}

void printMACAddress() {
  WiFi.macAddress(mac);
  MACAddress = mac2String(mac);
  Serial.println(MACAddress);
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();

  // Switch on the LED if an 1 was received as first character
  if ((char)payload[0] == "On") {
    digitalWrite(LED, HIGH);   // Turn the LED on (Note that HIGH is the voltage level
  }
   if ((char)payload[0] == "Off") {
    digitalWrite(LED, LOW);  // Turn the LED off by making the voltage LOW
   }

}

void reconnect() {
  // Loop until we're reconnected

  printMACAddress();
  const char* CL;
  CL = MACAddress.c_str();
  Serial.println(CL);
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect(CL)) {
      Serial.println("connected");
      client.subscribe("terima");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      ESP.restart();
      delay(5000);

    }
  }
}

void loop() {

  if (!client.connected()) {
    reconnect();
  }
  client.loop();

}