/*
AC Light Control
Uses up and down buttons to set levels
makes use of a timer interrupt to set the level of dimming
*/

//#include <Servo.h>
#include <ESP8266WiFi.h>
#include <MQTTClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <ESP8266HTTPUpdateServer.h>
#include <TimerOne.h>           // Avaiable from http://www.arduino.cc/playground/Code/Timer1


volatile int i=0;               // Variable to use as a counter of dimming steps. It is volatile since it is passed between interrupts
volatile boolean zero_cross=0;  // Flag to indicate we have crossed zero
int AC_pin = 3;                 // Output to Opto Triac
//int buton1 = 4;                 // first button at pin 4
//int buton2 = 5;                 // second button at pin 5
int dim2 = 0;                   // led control
int dim = 128;                  // Dimming level (0-128)  0 = on, 128 = 0ff
int pas = 8;                    // step for count;
int freqStep = 75;              // This is the delay-per-brightness step in microseconds. It allows for 128 steps
                                // If using 60 Hz grid frequency set this to 65

/* ---------- DO NOT EDIT ANYTHING ABOVE THIS LINE ---------- */

//Only edit the settings in this section

/* WIFI Settings */
// Name of wifi network
const char* ssid = "ASUS";

// Password to wifi network
const char* password = "Stratum@3995";

/* Web Updater Settings */
// Host Name of Device
const char* host = "MK-BlindsControl1";

// Path to access firmware update page (Not Neccessary to change)
const char* update_path = "/firmware";

// Username to access the web update page
const char* update_username = "admin";

// Password to access the web update page
const char* update_password = "admin";

/* MQTT Settings */
// Topic which listens for commands
char* subscribeTopic = "MK-SmartHouse/utilities/MK-BlindsControl1";

//MQTT Server IP Address
const char* server = "192.168.10.134";

//Unique device ID
const char* mqttDeviceID = "MK-SmartHouseDevice5";


/* ---------- DO NOT EDIT ANYTHING BELOW THIS LINE ---------- */

ESP8266WebServer httpServer(80);
ESP8266HTTPUpdateServer httpUpdater;

//Servo myservo;
WiFiClient net;
MQTTClient client;

unsigned long lastMillis = 0;

void connect();


void setup() {  // Begin setup
  Serial.begin(9600);
  //pinMode(buton1, INPUT);  // set buton1 pin as input
  //pinMode(buton2, INPUT);  // set buton1 pin as input
  pinMode(AC_pin, OUTPUT);                          // Set the Triac pin as output
  attachInterrupt(0, zero_cross_detect, RISING);    // Attach an Interupt to Pin 2 (interupt 0) for Zero Cross Detection
  Timer1.initialize(freqStep);                      // Initialize TimerOne library for the freq we need
  Timer1.attachInterrupt(dim_check, freqStep);      // Go to dim_check procedure every 75 uS (50Hz)  or 65 uS (60Hz)
  // Use the TimerOne Library to attach an interrupt



   WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, password);
   client.begin(server, net);
   client.onMessage(messageReceived);

   connect();

   MDNS.begin(host);

  httpUpdater.setup(&httpServer, update_path, update_username, update_password);
  httpServer.begin();

  MDNS.addService("http", "tcp", 80);
 }


void connect()
{
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(1000);
  }

  while (!client.connect(mqttDeviceID))
  {
    delay(1000);
  }

  client.subscribe(subscribeTopic);
}



void loop()
{
  client.loop();
  delay(10);

  if(!client.connected())
  {
    connect();
  }

  httpServer.handleClient();

}


void messageReceived(String &topic, String &payload, String &payload1)
{
  String buton1= payload;
  String buton2= payload1;
 // myservo.attach(2);
  //digitalWrite(buton1, HIGH);
  //digitalWrite(buton2, HIGH);

 if (buton1 == "UP")
   {
  if (dim<127)
   {
    dim = dim + pas;
    if (dim>127)
    {
      dim=128;
    }
  }
   }
  if (buton2 == "DOWN")
   {
  if (dim>5)
  {
     dim = dim - pas;
  if (dim<0)
    {
      dim=0;
    }
   }
   }
    while (buton1 == "UP")
    {
     }
    delay(10); // waiting little bit...

    while (buton2 == "DOWN")
    {
      }
    delay(10); // waiting little bit...


  dim2 = 255-2*dim;
  if (dim2<0)
  {
    dim2 = 0;
  }

  Serial.print("dim=");
  Serial.print(dim);
  Serial.print("     dim2=");
  Serial.print(dim2);
  Serial.print("     dim1=");
  Serial.print(2*dim);
  Serial.print('\n');
  delay (100);

}


void zero_cross_detect() {
  zero_cross = true;               // set flag for dim_check function that a zero cross has occured
  i=0;                             // stepcounter to 0.... as we start a new cycle
  digitalWrite(AC_pin, LOW);
}

// Turn on the TRIAC at the appropriate time
// We arrive here every 75 (65) uS
// First check if a flag has been set
// Then check if the counter 'i' has reached the dimming level
// if so.... switch on the TRIAC and reset the counter
void dim_check() {
  if(zero_cross == true) {
    if(i>=dim) {
      digitalWrite(AC_pin, HIGH);  // turn on light
      i=0;  // reset time step counter
      zero_cross=false;    // reset zero cross detection flag
    }
    else {
      i++;  // increment time step counter
    }
  }
}