#include <DHT.h>                //Library for DHT22
#include <LiquidCrystal_I2C.h>  //Library for LCD I2C
#include <RTClib.h>             //Library for RTC DS1307

LiquidCrystal_I2C lcd(0x27,20,4);   //Set the LCD address to 0x27 for a 16 chars and 2 line display
RTC_DS1307 rtc;                     //Set RTC

#define BUZZER  4
#define SPG     25                  //Set Pin
#define DHTPIN  27                  //Set Pin
#define SOILPIN 36                  //Set Pin
#define DHTTYPE DHT22               //Set Type
DHT dht(DHTPIN, DHTTYPE);

/*Sensor Control*/
float conTemp   = 40.00;
float conHumid  = 30.00;
int   conSoil   = 30;

/*Time Control*/
byte conHrs1    = 11;
byte conMins1   = 48;
byte conSec1    = 00;
byte conHrs2    = 11;
byte conMins2   = 49;
byte conSec2    = 00;

/*Cordition Control*/
bool MANUAL         = 0;
bool AIRCordition   = 0;
bool SOILCordition  = 0;

/*Function*/
void AIRCONTROL();
void SOILCONTROL();
void TIMECONTROL();

void setup()
{
  Serial.begin(115200);
  dht.begin();  //Initialize the DHT  
  rtc.begin();  //Initialize the RTC
  lcd.init();   //Initialize the lcd 
  lcd.backlight();
  lcd.clear();

  pinMode(SOILPIN,INPUT);
  pinMode(SPG,OUTPUT);
}

void loop(){
  if(MANUAL == 0){
    if ((AIRCordition == 1) || (SOILCordition == 1)){
      digitalWrite(SPG,1);
      lcd.setCursor(12,0);
      lcd.print("SPG ON ");
      // Serial.println("SPG ON");
      tone(BUZZER, 500, 1000);
      delay(1000);
      noTone(BUZZER);
    }
    else if ((AIRCordition == 0) && (SOILCordition == 0)){
      digitalWrite(SPG,0);
      lcd.setCursor(12,0);
      lcd.print("SPG OFF");
      // Serial.println("SPG OFF");
      lcd.setCursor(0,2);
      // lcd.print("NORMAL !!");
      noTone(BUZZER);
    }
    else{

    }
  }
  else{
  }
  // Serial.println((String)AIRCordition +":" +SOILCordition);
  AIRCONTROL();
  SOILCONTROL();
  TIMECONTROL();
}

void AIRCONTROL(){  //DHT22
  float humid = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float temp = dht.readTemperature();

  if ((temp >= conTemp)&&(humid <= conHumid)){
    lcd.setCursor(0,2);
    lcd.print("HIGH TEMP LOW HUMID");
    AIRCordition = 1;
  }
  else if (temp >= conTemp){
    lcd.setCursor(0,2);
    lcd.print("HIGH TEMP          ");
    AIRCordition = 0;
  }
  else if (humid <= conHumid){
    lcd.setCursor(0,2);
    lcd.print("LOW HUMID          ");
    AIRCordition = 0;
  }
  else{
  lcd.setCursor(0,2);
    lcd.print("AIR NORMAL          ");
    AIRCordition = 0;
  }
}

void SOILCONTROL(){ //SOIL MOISTURE
  int SOIL = analogRead(SOILPIN);
  int mapSOIL = map(SOIL,0,4095,0,100);
  if (mapSOIL <= conSoil){
    lcd.setCursor(0,3);
    lcd.print("LOW MOISTURE        ");
    SOILCordition = 1;
    
  }
  else{
    lcd.setCursor(0,3);
    lcd.print((String)"MOISTURE " +mapSOIL +"% NORMAL");
    SOILCordition = 0;
  }
}

void TIMECONTROL(){ //RTC
  DateTime now = rtc.now();
  byte hrs  = now.hour();
  byte mins = now.minute();
  byte sec  = now.second();

  float humid = dht.readHumidity(); 
  float temp = dht.readTemperature(); // Read temperature as Celsius (the default)

  if ((hrs == conHrs1)&&(mins == conMins1)&&(sec == conSec1)){
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("MOR SPG ON          ");
    digitalWrite(SPG,1);
    delay(3000);
    lcd.clear();
    MANUAL = 1;
  }
  else if ((hrs == conHrs2)&&(mins == conMins2)&&(sec == conSec2)){
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("AFT SPG ON           ");
    digitalWrite(SPG,1);
    delay(3000);
    lcd.clear();
    MANUAL = 1;
  }
  else{
    lcd.setCursor(10,3);
    lcd.setCursor(0,0);
    lcd.print((String) hrs +":" +mins +":" +sec +"  ");
    // lcd.clear();
    MANUAL = 0;
  }
  lcd.setCursor(0,1);
  lcd.print((String) "T " +temp +"C : " +"H "+humid +"%");
}