#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <DHT.h>

// what pin we're connected to
#define DHTPIN 6
// DHT 22  (AM2302)
#define DHTTYPE DHT22
//// Initialize DHT sensor for normal 16mhz Arduino
DHT dht(DHTPIN, DHTTYPE);

const int lcdAddress1 = 0x27; // Replace with the actual I2C address of LCD 1
const int lcdAddress2 = 0x28; // Replace with the actual I2C address of LCD 2
const int lcdAddress3 = 0x29; // Replace with the actual I2C address of LCD 3

const int Btn1 = 3;
const int LED = 5;
const int LEDNORMAL = 7;
const int BZR = 4;
volatile bool BUZZER = false;

float h;  //Stores humidity value
float t; //Stores temperature value

// I2C address 0x27, 16 column and 2 rows
// I2C LCD displays
LiquidCrystal_I2C lcd1(lcdAddress1, 16, 2);
LiquidCrystal_I2C lcd2(lcdAddress2, 16, 2);
LiquidCrystal_I2C lcd3(lcdAddress3, 16, 2);

void STOPBUZZER() {
  BUZZER = true;
}

void setup(void)
{
  dht.begin();
  Serial.begin(9600);
  lcd1.init(); // initialize the lcd
  lcd2.init(); // initialize the lcd
  lcd3.init(); // initialize the lcd
  lcd1.backlight();
  lcd2.backlight();
  lcd3.backlight();
  pinMode(Btn1, INPUT_PULLUP);
  pinMode(LED, OUTPUT);
  pinMode(LEDNORMAL, OUTPUT);
  pinMode(BZR, OUTPUT);
  attachInterrupt(digitalPinToInterrupt(Btn1), STOPBUZZER, CHANGE);
  //detachInterrupt(digitalPinToInterrupt(Btn1));
  lcd1.clear();  // clear display
  lcd2.clear();  // clear display
  lcd3.clear();  // clear display

  lcd3.setCursor(3, 0);         // move cursor to   (0, 0)
  lcd3.print("WELCOME TO");
  lcd3.setCursor(0, 1);
  lcd3.print("SMARTHOME SYSTEM");
  delay(500);                 // display the above for 1 second               // display the above for 1 second
}

void loop(void)
{
  digitalWrite(LED, LOW);
  digitalWrite(BZR, LOW);
 
  t = dht.readTemperature(); // Read temperature
  h = dht.readHumidity();  // Read humidity

  if (t < 35.00) {

    //lcd1.clear();  // clear display
    BUZZER = false;
    digitalWrite(LEDNORMAL, HIGH);
    lcd1.setCursor(0, 0);         // move cursor to   (0, 0)
    lcd1.print("     NORMAL     ");
    lcd1.setCursor(0, 1);
    lcd1.print("    CONDITION   ");
    delay(500);                 // display the above for 1 second

    //print the temperature in Celsius
    Serial.println("NORMAL CONDITION");
  }

  if (t >= 35.00) {
    digitalWrite(LED, HIGH);
    digitalWrite(LEDNORMAL, LOW);
    if (BUZZER) {
      digitalWrite(BZR, LOW);
    }
    else {
      digitalWrite(BZR, HIGH);
    }
    lcd1.clear();  // clear display
    lcd1.setCursor(0, 0);         // move cursor to   (0, 0)
    lcd1.print("TEMP.: ");
    lcd1.print(t);
    lcd1.print((char)223);	//shows degrees character
    lcd1.print("C");

    lcd1.setCursor(0, 1);
    lcd1.print("   WARNING!!!  ");
    delay(500);                 // display the above for 1 second

    //print the temperature in Celsius
    Serial.print("Temperature: ");
    Serial.print(t);
    Serial.print((char)176);//shows degrees character
    Serial.print("C  |  ");
    Serial.println("WARNING");
  }


  //else {
    //lcd1.clear();  // clear display
    lcd2.setCursor(0, 0);         // move cursor to   (0, 0)
    lcd2.print("TEMP.: ");
    lcd2.print(t);
    lcd2.print((char)223);	//shows degrees character
    lcd2.print("C");

    lcd2.setCursor(0, 1);
    lcd2.print("HUMI.: ");
	  lcd2.print(h);
	  lcd2.print("%");
    /*lcd2.print("Fhrt.: ");
    lcd2.print((t * 9.0) / 5.0 + 32.0);
    lcd2.print((char)223);	//shows degrees character
    lcd2.print("F"); */
    delay(500);                 // display the above for 1 second

    //print the temperature in Celsius
    Serial.print("Temperature: ");
    Serial.print(t);
    Serial.print((char)176);//shows degrees character
    Serial.print("C  |  ");

    //print the temperature in Fahrenheit
    Serial.print((t * 9.0) / 5.0 + 32.0);
    Serial.print((char)176);//shows degrees character
    Serial.println("F");
	  Serial.print("Humidity = ");
	  Serial.print(h);
	  Serial.println("% ");
	  Serial.println("");
    //delay(500);
  //}
}