#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4
#define DHTPIN 13
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);


DHT dht(DHTPIN, DHTTYPE);

//copy from mplabx
//#define Heater_PIN      RA0
//#define Humidifyer_PIN  RA1
//#define Ifan_PIN        RA2
//#define Ofan_PIN        RA3
//#define Dfan_PIN        RA5
//#define DHT11_PIN      RB0
//#define DHT11_PIN_DIR  TRISB0

//char Temperature[] = "TEMP : 00  C ";
//char Humidity[]    = " RH  : 00 %  ";
//unsigned char t, T_Byte2, h, RH_Byte2, CheckSum ;

int TmState=1;
int RhState=1;
#define Heater_PIN      6
#define Humidifyer_PIN  2
#define Ifan_PIN        3
#define Ofan_PIN        4
#define Dfan_PIN        5

float h; //humidity
float t; //temperature


void setup() {
  // Init
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();

  // Print something
  lcd.setCursor(3, 0);
  lcd.print("Hello, world!");
  lcd.setCursor(2, 1);
  lcd.print("Wokwi Online IoT");
  lcd.setCursor(5, 2);
  lcd.print("Simulator");
  lcd.setCursor(7, 3);
  lcd.print("Enjoy!");
  dht.begin();
  clearlcd();
  delay(1000);

  //set pinmodes
   pinMode(Heater_PIN, OUTPUT);
   pinMode(Humidifyer_PIN, OUTPUT);
   pinMode(Ifan_PIN, OUTPUT);
   pinMode(Ofan_PIN, OUTPUT);
   pinMode(Dfan_PIN, OUTPUT);
   

}
void clearlcd(){
 
  for (int row = 0; row < 4; row++){
    for (int col = 0; col < 20; col++){
      lcd.setCursor(col, row);
      lcd.print(" ");
      //delay(10);
     // Serial.println(F("clear"));
    }

  }
}



void SetStates(void)
{
    if (h >= 1 & h <56)
    {
        RhState = 0;
    }
    else if (h >= 56 & h <=65)
    {
        RhState = 1;
    }
    else if (h >65 & h <=100)
    {
        RhState = 2;
    }
    else
    {
        RhState = 3;
    }
    
    if (t >= 1 & t <= 33)
    {
        TmState = 0;
    }
    else if (t > 33 & t <= 35)
    {
        TmState = 1;
    }
     else if (t > 35 & t <=100)
    {
        TmState = 2;
    }
     else
         TmState = 3;
             
}


  
void SetEquip()
{
    if (TmState == 0 & RhState == 0) //Cold Dry
    {
        /*
        digitalWrite(Heater_PIN,HIGH);  
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,LOW);
        Dfan_PIN        =1;
         */
        
        //relay is low active 0 is on ; 1 is off
        digitalWrite(Heater_PIN,LOW);
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,LOW);

        

    }
    else if (TmState == 0 & RhState == 1) //Cold Normal
    {
        /*
        digitalWrite(Heater_PIN,HIGH);  
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,LOW);
        Dfan_PIN        =1;
         */
        //relay is low active 0 is on ; 1 is off
        digitalWrite(Heater_PIN,LOW);  
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,LOW);
    }
    else if (TmState == 0 & RhState == 2)//Cold Wet
    {
        /*
        digitalWrite(Heater_PIN,HIGH);  
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,LOW);
        Dfan_PIN        =1;
         * */
        //relay is low active 0 is on ; 1 is off
        digitalWrite(Heater_PIN,LOW);  
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,LOW);
        
    }
      else if (TmState == 1 & RhState == 0)//Normal Dry
    {
        /*
          digitalWrite(Heater_PIN,LOW);  
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,LOW);
        digitalWrite(Dfan_PIN,HIGH); 
         */ 
        //relay is low active 0 is on ; 1 is off
        digitalWrite(Heater_PIN,HIGH);  
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,LOW);  
        
    }
      else if (TmState == 1 & RhState == 1)//Normal Normal
    {
        /*
          digitalWrite(Heater_PIN,LOW);  
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,LOW);
        digitalWrite(Dfan_PIN,HIGH);
         */    
        //relay is low active 0 is on ; 1 is off
        digitalWrite(Heater_PIN,HIGH);  
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,LOW);  
    }
      else if (TmState == 1 & RhState == 2)//Normal Wet
    {
        /*
          digitalWrite(Heater_PIN,LOW);  
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,LOW);
        digitalWrite(Dfan_PIN,HIGH); 
         */  
        //relay is low active 0 is on ; 1 is off
         digitalWrite(Heater_PIN,HIGH); 
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,LOW); 
    }
      else if (TmState == 2 & RhState == 0) //Hot Dry
    {
        /*
          digitalWrite(Heater_PIN,LOW);  
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,HIGH);
        Dfan_PIN        =1;
         */   
        //relay is low active 0 is on ; 1 is off
        digitalWrite(Heater_PIN,HIGH);  
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,LOW);
        digitalWrite(Dfan_PIN,LOW);
    }
      else if (TmState == 2 & RhState == 1)//Hot Normal
    {
        /*
          digitalWrite(Heater_PIN,LOW);  
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,HIGH);
         */      
        //relay is low active 0 is on ; 1 is off
         digitalWrite(Heater_PIN,HIGH); 
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,LOW);
        digitalWrite(Dfan_PIN,LOW);
    }
      else if (TmState == 2 & RhState == 2)//Hot Wet
    {
        /*
          digitalWrite(Heater_PIN,LOW);  
        digitalWrite(Humidifyer_PIN  ,LOW);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,HIGH);
         */     
        //relay is low active 0 is on ; 1 is off
        digitalWrite(Heater_PIN,HIGH);  
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN,LOW);
        digitalWrite(Ofan_PIN,LOW);
        digitalWrite(Dfan_PIN,LOW);
    }
          else //Error
    {
        /*
          Heater_PIN      =0;  
        Humidifyer_PIN  =0;
        digitalWrite(Ifan_PIN        ,LOW);
        digitalWrite(Ofan_PIN,LOW);
        digitalWrite(Dfan_PIN,LOW); 
         */
        //relay is low active 0 is on ; 1 is off    
        digitalWrite(Heater_PIN,HIGH);  
        digitalWrite(Humidifyer_PIN  ,HIGH);
        digitalWrite(Ifan_PIN        ,HIGH);
        digitalWrite(Ofan_PIN,HIGH);
        digitalWrite(Dfan_PIN,HIGH); 
    }
}
  
  
void DisplayStats()
{
            
            clearlcd();
            
            lcd.setCursor(2, 0);
           
            if (TmState==0) lcd.print("Cold ");
            
            if(TmState==1) lcd.print("Normal ");
            
            if(TmState==2) lcd.print("Hot ");
            
            if(TmState==3) lcd.print("Error ");
            
            lcd.setCursor(11, 0);
            
            if (RhState==0) lcd.print("Dry");
            
            if(RhState==1) lcd.print("Normal");
            
            if(RhState==2) lcd.print("Wet");
            
            if(RhState==3) lcd.print("Error");


            lcd.setCursor(1, 1);
            if (Heater_PIN==HIGH)
            {
                lcd.print("Heat OFF"); 
            }
            else if (Heater_PIN==0)
            {
                lcd.print("Heat ON");
            }
            
            else 
            {
              lcd.print("Heat=xx");
              Serial.print(Heater_PIN);
            }
            if (Humidifyer_PIN==HIGH)
            {
                lcd.print("Hdt=OFF "); 
            }
            else if (Humidifyer_PIN==0)
            {
                lcd.print("Hdt=ON ");
            }    
            else 
            {
            lcd.print("Hdt=xx ");
            Serial.print(Humidifyer_PIN);
            }

            
            delay(2000);
            clearlcd;
            lcd.setCursor(1, 2);
            
            if (Ifan_PIN==HIGH)
            {
                lcd.print("IF=OFF "); 
            }
            else if (Ifan_PIN==0)
            {
                lcd.print("IF=ON ");
            } 
            else 
            {
              lcd.print("IF=xx ");
              Serial.print(Ifan_PIN);
            }
            if (Ofan_PIN==HIGH)
            {
                lcd.print("OF=OFF "); 
            }
            else if (Ofan_PIN==0)
            {
                lcd.print("OF=ON ");
            }     
            
            else 
            {
              lcd.print("OF=xx ");
              Serial.print(Ofan_PIN);
            }
             lcd.setCursor(5, 3);
             if (Dfan_PIN==HIGH)
            {
                lcd.print("DF=OFF"); 
            }
            else if (Dfan_PIN==0)
            {
                lcd.print("DF=ON");
            } 
            else 
            {
              lcd.print("DF=xx ");
             Serial.print(Dfan_PIN);
            }
}

void loop() {
  // Wait a few seconds between measurements.
  delay(2000);
  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Compute heat index in Fahrenheit (the default)
  float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);
 
 lcd.setCursor(1, 0);
 lcd.print("Humidity: ");
 lcd.print(h);
 lcd.print(" %");
 lcd.setCursor(1, 1);
 lcd.print("Temperature: ");
 lcd.print(t);
 //lcd.print("°C ");
 lcd.setCursor(1, 2);
 lcd.print("Heat Index: ");
 lcd.print(hic);
delay(2000);


SetStates();
SetEquip();
DisplayStats();
delay(2000);
  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));
}