#include <ArduinoOTA.h>        //*** Enables OTA programming. 1 of 3 lines
WiFiServer server(80); //Used for WiFi Server
#include <ESP8266WiFi.h>
#include <espnow.h>
#include <RtcDS3231.h>         //Real Time Clock library on I2C for DS3231. pin D1 is SCL, pin D2 is SDA
#include <OneWire.h>           //Used for DS18B20 temp sensors https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf
#include <DallasTemperature.h> //Used for DS18B20 temp sensors. Run Simple DS18B20 from DallasTemperature first to find sensor addresses.
                               //Run Example Simple.pde from DallasTemperature first to find sensor addresses.
#include <Wire.h>              //I2C library Used for Real Time Clock and MCP23017 I/O expander. Same two wires.
#include <RtcDS3231.h>         //RTC library

#define ONE_WIRE_BUS D5         //Define pin the one wire bus is on

RtcDS3231<TwoWire> Rtc(Wire);   // Real Time clock
int yvalue, rvalue, input4, analoginput, counter, wkday, offtimewh;
// int automode; // auto mode


//****ESP Now Receive Variables***************************
// Structure example to receive data
// Must match the sender structure
typedef struct struct_message {
    char a[32];
    int b;
    float c;
    String d;
    bool e;
} struct_message;

// Create a struct_message called myData
struct_message myData;


// Callback function that will be executed when data is received
void OnDataRecv(uint8_t * mac, uint8_t *incomingData, uint8_t len) {
  memcpy(&myData, incomingData, sizeof(myData));
 }

//****End of ESP Now Receive Variables********************



int lastSecond = -1; // set last second to impossible number so it prints right away then every second
int lastSecond1 = -1; // used to reset alert only once per second
int currentmillis = 0;
int previousmillis = 0;

String request, timedate, Month, Day, Hour, Minute, Second, dow, distancestring;
String insidetemp, humidity, furnaceLED, basementtemp, outsidetemp, tempdata;
float temp1, t2, temp2, h1, prevh1, prevt1, amps;


// Furnace Variables
    int Light = 0;
    int Fan = 0;
    
    float degreesC, temp1raw, temp2raw; 
    
    int light_level, furnaceONvalue;
    
    int seconds, timeNOW, timeLAst;
        
// Ultrasonic variables
  // int trig = D4;// common trigger output
   int ultrasonics_read;
   int distance_echo = D0;
   int distance_duration; int Barreldistance; int distance=100; int Barrel_full; // initialize level to 100% so pumps don't start after upload - only reads level every minute

   int Tankduration; int Tankdistance; int Tank_level=100; // initialize level to 100% so pumps don't start after upload - only reads level every minute
   
// End of Ultrasonic Variables

OneWire oneWire(ONE_WIRE_BUS);        //Used for DS18B20 temp sensors
DallasTemperature sensors(&oneWire);  //Used for DS18B20 temp sensors
DeviceAddress Sens1, Sens2;           //Used for DS18B20 temp sensors

void setup() {
   ArduinoOTA.begin(); //*** Enables OTA programming. 2 of 3 lines
   server.begin();

   
   pinMode(D0, INPUT);     // Initialize D1 pin as an input Barrel Ultrasonic echo on Nodemcu 12E board   
   // pinMode(D3, OUTPUT);     // Initialize D3 pin as an output Ultrasonic trigger on Nodemcu 12E board
   pinMode(D4, OUTPUT);     // Initialize D4 pin as an output Ultrasonic trigger on Nodemcu 12E board
   pinMode(D6, OUTPUT);     // Initialize D6 pin as an output for LIGHT on relay 1     on Nodemcu 12E board
   pinMode(D7, OUTPUT);     // Initialize D7 pin as an output for FAN on relay 2   on Nodemcu 12E board
 
// Initialize relay outputs to HIGH since LOW activates the relay 
   
    digitalWrite(D6, HIGH); // Relay 1 for Light
    digitalWrite(D7, HIGH); // Relay 2 for Fan
   
    
   Rtc.Begin();     //Starts I2C
   
    // Start up the DS18B20 library and set temp resolution 11 bits equals .125C
   
   sensors.begin();
   sensors.getAddress(Sens1, 0);
   sensors.setResolution(Sens1, 11);
   sensors.getAddress(Sens2, 1);
   sensors.setResolution(Sens2, 11);
   
//  Uncomment next two lines to set Real Time Clock if required - after setting clock make sure and upload commented version again or time will be reset on reboot
//    RtcDateTime t = RtcDateTime(19, 9, 12, 14, 8, 0); //set date and time NO leading zeroes (yr mo day Hour min sec)
//    Rtc.SetDateTime(t); //configure the RTC with object // send about 25 secs before actual time.gov time to allow for compile

//******ESP NOW Setup****************************************************

// Set device as a Wi-Fi Station
  WiFi.mode(WIFI_STA);

    // Init ESP-NOW
  if (esp_now_init() != 0) {
//    Serial.println("Error initializing ESP-NOW");
    return;
  }
  
// Once ESPNow is successfully Init, we will register for recv CB to
  // get recv packer info
  esp_now_set_self_role(ESP_NOW_ROLE_SLAVE);
  esp_now_register_recv_cb(OnDataRecv);
  
//******End of ESP NOW Setup*********************************************
 
       }

int  automode = 0; // default mode is AUTO OFF mode 


void loop() {

  ArduinoOTA.handle();     //*** Enables OTA programming. 3 of 3 lines
  if (myData.b > 300) digitalWrite(D4, LOW);   // Turn the LED on (Note that LOW is the voltage level
  if (myData.b < 300) digitalWrite(D4, HIGH);  // mData.b is coming from the sending NodeMCU
 //*************Analog Input read******************************************************
 
    analoginput = analogRead(0); //Check!! Nodemcu 12E is digital 0 to 1024 for input 0 to 3.3V NOT 0 to 1.0V on pin A0.
    furnaceONvalue = analoginput; // furnace program uses this variable for analog input of furnace LED ON
    
//*************End Analog Input read******************************************************
    
//*******Get Date and Time*************************************************
  RtcDateTime t = Rtc.GetDateTime();    //get the time from the RTC

  char str[15];   //declare a string as an array of chars

  sprintf(str, "%d/%d/%d %d:%d:%d",     //%d allows to print an integer to the string
          t.Year(),   //get year method
          t.Month(),  //get month method
          t.Day(),    //get day method
          t.Hour(),   //get Hour method
          t.Minute(), //get Minute method
          t.Second()  //get Second method
  
         );

//********End Get Date and Time***********************************************


//*********Light ON/OFF Logic*************************************************

    if (Light == 1) digitalWrite(D6, LOW);// Light is on NC contacts so Default is OFF. LOW activates relay to turn Fan ON

    if (Light == 0) digitalWrite(D6, HIGH);// LOW deactivates relay to turn Light OFF


//********End Light ON/OFF Logic*********************************************


//********* Fan ON/OFF Logic*************************************************

   if (Fan == 1) { digitalWrite(D7, LOW); // Turn ON Fan
   
    }

     if (Fan == 0) { digitalWrite(D7, HIGH); // Turn OFF Fan   

     }
//*********Fan ON/OFF Logic*************************************************

//********Read temp from DS18B20s*****************************
    
      sensors.requestTemperatures(); // Send the command to get temperatures from DS18B20s
    
     
// Reading temperatures from sensors
     
      temp1raw = sensors.getTempCByIndex(0); //DSB1820 temp1
      if ((temp1raw > -50.0) && (temp1raw < 50.0)) temp1 = temp1raw; // error checking 
         
      temp2raw = sensors.getTempCByIndex(1); //DSB1820 temp2
      if ((temp2raw > -50.0) && (temp2raw < 50.0)) temp2 = temp2raw; // error checking

     if ((automode == 1) && (temp1 > 24.0)) digitalWrite(D7, LOW);  //LOW activates relay
     if ((automode == 1) && (temp1 < 23.0)) digitalWrite(D7, HIGH); // HIGH deactivates relay
     
     if ((automode == 1) && (temp1 > 24.0)) Fan = 1; // for web page display 
     if ((automode == 1) && (temp1 < 23.0)) Fan = 0; // for web page display 
     
//********End read temperature ****************************************

//*****Read Ultrasonics*********************************************************
if ((t.Second() == 0) || (t.Second() == 5) || (t.Second() == 10) || (t.Second() == 15) || (t.Second() == 30) || (t.Second() == 35) || (t.Second() == 40) || (t.Second() == 45) || (t.Second() == 50) || (t.Second() == 55)) ultrasonics_read = 0; // reset ultrasonics_read bit after 0

if (ultrasonics_read == 0){ // only read ultrasonics once every 5 secs
ultrasonics_read = 1; // only read once every five seconds

// Ultrasonic Distance Sensor 

delay(10);
// Clears the trig
// digitalWrite(trig, LOW);
delayMicroseconds(2);

// Sets the trigPin on HIGH state for 10 micro seconds

// digitalWrite(trig, HIGH);
delayMicroseconds(10);
// digitalWrite(trig, LOW);

// Reads the echoPin, returns the sound wave travel time in microseconds

distance_duration = pulseIn(distance_echo, HIGH);

// Calculating the distance
distance = distance_duration*0.17; // BML demo for distance in mm

delay(100);

}

//*****End Read Ultrasonic*****************************************************  

//***read photoresistor light_level *****
   
    light_level = 1024 - analogRead(0);

    if ((automode == 1) && (light_level < 500)) Light = 1;
    if ((automode == 1) && (light_level > 600)) Light = 0;
    
    
//********end read photoresistor light_level *******************


//*******WiFi detect client and record input********************************
// Check if a client has connected
  WiFiClient client = server.available();
  if (!client) {
    return;
  }
  // Read the first line of the request
      request = client.readStringUntil('\r');
  
   client.flush();
//*******End of WiFi detect client and record input********************************

//*************Actions on web page button click. Buttons defined below.************************
     
  if (request.indexOf("/FAN=ON") != -1)  {// Input from screen. No spaces in name.

       if (automode == 0) Fan = 1; 
  }
  if (request.indexOf("/FAN=OFF") != -1)  {// Input from screen. No spaces in name.

     
      if (automode == 0) Fan = 0; 
  }

// Match the request 
 
 if (request.indexOf("/LIGHT=ON") != -1)  {// yvalue = Sys ON. Input from screen. No spaces in name.
      
    if (automode == 0) Light = 1;  
   
  }

  if (request.indexOf("/LIGHT=OFF") != -1) {// Input from screen. No spaces in name.
     
    
    if (automode == 0) Light = 0;
   
     }

   
  if (request.indexOf("/AUTO_ON") != -1)  {// Input from screen. No spaces in name. Water heater auto mode
     automode = 1;
     } 

  if (request.indexOf("/AUTO_OFF") != -1)  {// Input from screen. No spaces in name. Water heater auto mode
     automode = 0;
     } 
   
   request.indexOf("/HOME");  // Go to Home page after LEDs set.
 
  
 

//*******End of web page button actions******************************************************

//****** Return the response in HTML on web page************************************

  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  do not forget this one
  client.println("<!DOCTYPE HTML>");
  client.println( // start code html with this. Have to add quotes before and after. Delete most html quotes in line.
    "<html>"
        "<head>"
          "<title>ESP NOW Web Page Demo</title>"
//            "<meta http-equiv=refresh content=60; url=/http://192.168.0.188//>" // Auto refresh every 60 secs. Issues?
      
      "<meta name=viewport content=width=720px, initial-scale=1.0>"    
      "<meta name=viewport shrink-to-fit=yes>" 
       
        "</head>"
    "<style> p {font-size: 14px; color:blue; font-family:monospace;} </style>" //Use monospace font to make columns of text and numbers line up
    "<p>"); // large font applies between <p> and </p> below
 //*********End HTML page start of defintion*****************************************
 
 
 //*********Print Date and Time add leading zeroes to Web Page***********************************
 
      Hour = String(t.Hour()); // integers like t.Hour() are used for comparisons and control. Change to string for display and add leading zeroes
    if (t.Hour() <= 9) Hour = "0" + Hour;  // adjust for 0-9
      Minute = String(t.Minute());
    if (t.Minute() <= 9) Minute = "0" + Minute;  // adjust for 0-9
      Second = String(t.Second());
    if (t.Second() <= 9) Second = "0" + Second;  // adjust for 0-9
 
    if (t.DayOfWeek() == 0) dow = " Sun"; // t.DayOfWeek() calculated from rest of date not from DS3231
    if (t.DayOfWeek() == 1) dow = " Mon";
    if (t.DayOfWeek() == 2) dow = " Tue";
    if (t.DayOfWeek() == 3) dow = " Wed";
    if (t.DayOfWeek() == 4) dow = " Thu";
    if (t.DayOfWeek() == 5) dow = " Fri";
    if (t.DayOfWeek() == 6) dow = " Sat";

    Month = String(t.Month());
    Day = String(t.Day());
  
    if (t.Month() <= 9) Month = "0" + Month;  // adjust for 0-9 in month
    if (t.Day() <= 9) Day = "0" + Day;  // adjust for 0-9 in day
  
    timedate = String(t.Year())+ "/" + Month + "/" + Day + " " + Hour + ":" + Minute + ":" + Second ; // create string for display with one client.println
 
    client.println(timedate);

    client.println("&emsp;"); // add spaces
    client.println(dow); // print day of week
    client.println("&emsp;"); // add spaces  
    
//*********End Print Date and Time to Web Page ********************************************

//*********Web Page Button Style defintion CSS******************************************************************
 
  client.println(  //html output. Put quotes around html code. Don't have to client.println every line
    "<style>" // button style definition
    ".button {"
    "background-color: #008CBA; /* Blue */"
    "border: none;"
    "border-radius: 4px;"
    "color: yellow;"
    "padding: 12px 24px;"
    "text-align: center;"
    "text-decoration: none;"
    "display: inline-block;"
    "font-size: 16px;"
    "}"
    "</style>"
//*****End Web Page Button Style Definition************************************************************************************************

//******Web Page Buttons Definitions************************************************************************************************
    "<br>"
    "<a href=\"/LIGHT=ON\"\"><button class=button>LIGHT ON </button></a>"   // LIGHT ON button definition. No spaces
    "&nbsp;" // horizontal space between buttons
    "<a href=\"/LIGHT=OFF\"\"><button class=button>LIGHT OFF </button></a>" //LIGHT OFF button definition. No spaces
    "&nbsp;"
    "<a href=\"/FAN=ON\"\"><button class=button>FAN ON </button></a>"      // FAN ON button definition. No spaces
    "&nbsp;" // horizontal space between buttons
    "<a href=\"/FAN=OFF\"\"><button class=button>FAN OFF </button></a>"    //FAN OFF button definition. No spaces
    "&emsp;" // horizontal space between buttons
    "<a href=\"/HOME\"\"><button class=button>HOME </button></a>"); //Home button definition. No spaces
    
    
  //  client.print("&emsp; &emsp;"); // add spaces
  //client.println(
  //    "&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;"); // add spaces
 
      
//*****End Button Definition************************************************************************************************

//***** Display data to web page 

  
    client.println("<style> p {font-size: 14px; color:blue; font-family:monospace;} </style>" //Use monospace font to make columns of text and numbers line up
      "<p>"); // large font applies between <p> and </p> below 
    
    tempdata = "Temp "+String(temp1,1)+"C";
    
    client.println(tempdata);
    client.println("&emsp;"); 
  
    client.println(" Light_Level ");      
    client.println(myData.b);
    client.println("&emsp;"); 
    distancestring = "Distance "+String(distance)+"mm";  
    
//    client.println(distancestring);
    client.println(" Counter ");      
    client.println(myData.c);
    client.println("&emsp;"); 
   
    client.println("<br>");
    client.println("<br>");
    client.println("&emsp;&emsp;&emsp;&emsp;"); 
    
 
  // client.println("&emsp;"); 
   //client.println("&emsp;"); 
   
   client.println(
    //***Furnace and water heater buttons***************
    "&emsp;" //Clear Flag button definition. No spaces
    "&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp; <a href=\"/AUTO_ON\"\"><button class=button>AUTO ON</button></a>"
    "&nbsp;<a href=\"/AUTO_OFF\"\"><button class=button>AUTO OFF</button></a>");
    //***End furnace and water heater buttons***********
  
   // "<br>");
    
  
  //****Print data to web page
  
   client.println("<style> p {font-size: 14px; color:blue; font-family:monospace;} </style>" //Use monospace font to make columns of text and numbers line up
      "<p>"); // large font applies between <p> and </p> below

   client.println("&nbsp");
 
   client.println("&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;");
      if (automode == 1) client.println("Auto:ON_");
      if (automode == 0) client.println("Auto:OFF"); 
   client.println("&emsp;");

         
       client.println("&emsp;");
      if (Light == 0) client.println("Light:OFF");
      if (Light == 1) client.println("Light:ON_");
      
      client.println("&emsp;");
      if (Fan == 0) client.println("Fan:OFF");
      if (Fan == 1) client.println("Fan:ON_"); 
      client.println("&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;");






































      
      client.println("ESP NOW");
       
    client.println("<br>");
     client.println("&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;");

    client.println("<br>");
    
   client.println("<br>"); 
   client.println("<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
      "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
     "<br>"
    "<br>"
    "<br>"
    "<br>"
    "<br>"
    "<br>"
    "<br>"       
    "<br>"
    "<br>"
    "<br>"     

    ".");    // add period below the background you want to display or it won't scroll past last text
    client.println("</p>"
      "</body>");
  
client.println("<br>");
  delay(1);
client.println("</html>");
  delay(200);
 client.stop(); // disconnect client to allow other clients
  delay(1);