//DHT 22
#include "DHT.h"
#define DHTPIN 2
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
float temperature;
float humidity;
DHT dht(DHTPIN, DHTTYPE);

unsigned long currentMillisDHT22;
unsigned long previousMillisDHT22 = 0;
const unsigned long periodDHT22 = 2500;

//LCD
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

//Buttons
const int blueButtonPin = 4;
const int greenButtonPin = 5;

bool blueButtonState = 0;
bool greenButtonState = 0;
bool lastBlueButtonState = 0;
bool lastGreenButtonState = 0;

int greenButtonCounter=0; //increment threshold humidity
int blueButtonCounter=0;  //increment threshold temperature

int setTemp=5;
int setHum=0;

int relayPin=13;
 
 

void mainMenu(){
  lcd.setCursor(0, 0);
  lcd.print("Hum.: ");
  lcd.print(humidity,1);
  lcd.print(" ");
  lcd.setCursor(11,0); 
  lcd.print("%");
  lcd.setCursor(0,1);
  lcd.print("Temp.:");
  lcd.print(temperature,1);
  lcd.print(" ");
  lcd.setCursor(11,1);
  lcd.print(char(223)); lcd.print("C");
  }



void setup() {
  pinMode(relayPin, OUTPUT);
  pinMode(blueButtonPin, INPUT);
  pinMode(greenButtonPin, INPUT);
 
  lcd.begin(16, 2);
  lcd.print("System "); lcd.setCursor(1, 1);
  lcd.print("    loading...");
  lcd.blink();
  delay(1000);
  lcd.noBlink();
  lcd.clear();

  dht.begin();
}

void loop() {
 
  currentMillisDHT22 = millis();
  if (currentMillisDHT22 - previousMillisDHT22 >= periodDHT22) {
    temperature = dht.readTemperature();
    humidity = dht.readHumidity();
    previousMillisDHT22 = currentMillisDHT22;
  }

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    lcd.println(F("Failed to read from DHT sensor!"));
    return;
  }
 
  greenButtonState = digitalRead(greenButtonPin);
  if (greenButtonState== HIGH  ) {
   
   setHum+=5;
   lcd.home();
    lcd.print("Set humidity:   ");
    lcd.setCursor(14, 0);
    lcd.print(setHum);
    //greenButtonCounter;
    delay(200);
  } else {
     
    lcd.setCursor(14, 0);
    lcd.print(setHum);
  }
  /*if (setHum=100){
    lcd.setCursor(14, 0);
    lcd.print("  ");
    }
    else {
    lcd.setCursor(14, 0);
    lcd.print(setHum);
  setHum=0;
  }*/
 //lastGreenButtonState=greenButtonState;

blueButtonState = digitalRead(blueButtonPin);
  if (blueButtonState == HIGH) { 
    
    lcd.setCursor(14, 1);
    lcd.print(setTemp);
  } else {

    lcd.setCursor(14, 1);
    lcd.print(setTemp);
  }
 if (greenButtonState==LOW && blueButtonState==LOW){
   mainMenu();
 }
 if (humidity<=setHum && temperature>=setTemp){
   digitalWrite(relayPin, HIGH);
  }else {
   digitalWrite(relayPin,LOW);
 }
 
}