#include <LiquidCrystal.h>
#include "DHT.h"
#include "RTClib.h"
#include <Adafruit_PM25AQI.h>
#define DHTPIN 2
#define DHTTYPE DHT22  
Adafruit_PM25AQI PM;
DHT dht(2, DHT22);
RTC_DS1307 rtc;
LiquidCrystal lcd(12,11,10,9,8,7);
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};


void setup() {
lcd.begin(16,2);
dht.begin();
rtc.begin();
}
void loop() {
 delay(2000);
   lcd.setCursor(0, 0);
    DateTime now = rtc.now();
   lcd.print(now.month(), DEC);
   lcd.print('/');
   lcd.print(now.day(), DEC);
   lcd.print('/');
   lcd.print(now.year(), DEC);
   lcd.print("(");
   lcd.print(daysOfTheWeek[now.dayOfTheWeek()]);
   lcd.print(")");
   lcd.setCursor(0, 1);
   lcd.print(now.hour(), DEC);
   lcd.print(':');
   lcd.print(now.minute(), DEC);
   lcd.print(':');
   lcd.print(now.second(), DEC);
   lcd.println();
 delay(3000);
   lcd.setCursor(0, 0);
   lcd.print("Todays AQIIndex:");
   lcd.setCursor(0, 1);
   lcd.println( );
   lcd.println( );
   lcd.println( );
   lcd.println( );
 delay(3000);
   float h = dht.readHumidity();
   // Read temperature as Celsius (the default)
   float t = dht.readTemperature();
   // Read temperature as Fahrenheit (isFahrenheit = true)
   float f = dht.readTemperature(true);
   float hif = dht.computeHeatIndex(f, h);
   // Compute heat index in Celsius (isFahreheit = false)
   float hic = dht.computeHeatIndex(t, h, false);
   lcd.clear();
   lcd.setCursor(0, 0);
   lcd.print(F("Humidity:"));
   lcd.print(h);
   lcd.setCursor(0, 1);
   lcd.print(F("Temperature:"));
   lcd.print(t);
 delay(4000);
   lcd.clear();
   lcd.setCursor(0, 0);
   lcd.print("Have a good day!");
 void exit();
}