/*
TO DO

LCD Pins aendern
Relais beruhigen
Menues anfertigen
___________________________________
Key Codes (in left-to-right order):

None   - 0
Select - 1
Left   - 2
Up     - 3
Down   - 4
Right  - 5
*/

#include <dht.h>
#include <LiquidCrystal.h>
#include <DFR_Key.h>
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);


dht DHT;
DFR_Key keypad;

#define dhtA 5
#define dhtI 6
#define relais 7

int localKey = 0;      //Tastenerkennung
String keyString = ""; //??

double dewPointFast(double celsius, double humidity) //Taupunkt berechnung
{
        double a = 17.271;
        double b = 237.7;
        double temp = (a * celsius) / (b + celsius) + log(humidity/100);
        double Td = (b * temp) / (a - temp);
        return Td;
}

float dewI = 0; //Taupunkt Innen
float dewA = 0; //Taupunkt Aussen
float tempI = 0;//Temperatur Innen
float tempA = 0;//Temperatur Aussen
float humI = 0; //Luftfeuchtigkeit Innen
float humA = 0; //Luftfeuchtigkeit Aussen
int count = 0;  //Counter fuer die Eingabe
int statL = 1;  //Status der Luefter
int menueH = 0; //Durchs Hauptmenue gehen
int statS = 0;  //brauche ich das??


void setup()
{
  Serial.begin(115200); //Verbindung Computer
  //pinMode(relais, OUTPUT);
  digitalWrite(relais, HIGH);
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("0.01 by Jules");
  delay(2500);
}

void loop()
{

    if(statL == 1)  //notwendig um Relais zu schalten!!
    {
      digitalWrite(relais, LOW);
    }

    else
    {
      digitalWrite(relais, HIGH);
    }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Messung laeuft");


  DHT.read22(dhtI); //Sensor Innen auslesen
  delay(500);
  DHT.read22(dhtI);
  float humI = DHT.humidity;
  float tempI = DHT.temperature;
  float dewI = (dewPointFast(DHT.temperature, DHT.humidity));

  DHT.read22(dhtA); //Sensor Aussen auslesen
  delay(500);
  DHT.read22(dhtA);
  float humA = DHT.humidity;
  float tempA = DHT.temperature;
  float dewA = (dewPointFast(DHT.temperature, DHT.humidity));

  dewA = dewA + 5; //Test!!!!!!!!!!!!!!!!!!!

  if (dewA > dewI)  //Ueberprueft die Luftfeuchtigkeit schaltet die Luefter und speichert den Status in statL
  {
    digitalWrite(relais, HIGH); //Luefter ausschalten
    statL = 0;
    delay(10000); //Test!!!!!!!
  }

  else
  {
    digitalWrite(relais, LOW); //Lufter einschalten
    statL = 1;
  }
  Serial.println(statL); //loeschen
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Erwarte Befehle");


    count = 0; //integer, wenn zu hoch Speicherüberlauf!!!

  while(count < 30000) //Menuefunktion
  {
    keypad.getKey();
    menueH = keypad.getKey();

    if(statL == 1) //notwendig um Relais zu schalten!!
    {
      digitalWrite(relais, LOW);
    }

    else
    {
      digitalWrite(relais, HIGH);
    }


    switch (menueH) //Einzelne Menuepunkte
    {
      case 1:
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Taste1");
      delay(2000);
      lcd.clear();
      break;

      case 2:
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Taste2");
      delay(2000);
      lcd.clear();
      break;

      case 3:
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Taste3");
      delay(2000);
      lcd.clear();
      break;

      case 4:
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Taste4");
      delay(2000);
      lcd.clear();
      break;

      case 5:
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Taste5");
      delay(2000);
      lcd.clear();
      break;
    }

    if(menueH != SAMPLE_WAIT) //Setzt den Counter auf Null wenn Eingabe erfolgt ist.
    {
      count = 0;
    }


    else
    {
      count++; //Ohne Einmgabe laueft der Counter
    }

    //Serial.println(count);


  }


//  Serial.println ("Innensensor:");
//  Serial.print ("humI: ");
//  Serial.println (humI);
//  Serial.print ("tempI: ");
//  Serial.println (tempI);
//  Serial.print ("dewI: ");
//  Serial.println (dewI);
//  Serial.println ("");
//
//
//  Serial.println ("Aussensensor:");
//  Serial.print ("humA: ");
//  Serial.println (humA);
//  Serial.print ("tempA: ");
//  Serial.println (tempA);
//  Serial.print ("dewA: ");
//  Serial.println (dewA);
//  Serial.println ("____________________");

}