/* Showing number 0-9 on a Common Cathode 7-segment LED display
  Displays the numbers 0-9 on the display, with one second inbetween.
    A
   ---
F |   | B
  | G |
   ---
E |   | C
  |   |
   ---
    D
*/
#include "DHT.h" //DHT Bibliothek laden
#define DHTTYPE DHT22 // Arduino HW DHT11
int DHTPIN = A0;
DHT DhtSensor (DHTPIN, DHTTYPE); //Der Sensor wird ab jetzt DhtSensor genannt
#define HIGH 1
#define LOW 0
int on = 0, off = 1;
// Pin 2-8 is connected  to the 7 segments of the display.
int TimeDisplay = 500; // in microseconds 
int pinA = 2;//red
int pinB = 3;//grey
int pinC  = 4;//brown
int pinD = 5;//purple
int pinE = 6;//pink
int pinF = 7;//yellow
int pinG = 8;// brown
int D1 = 9; //blue
int D2 = 10; // green
int D3 = 11;//orange
int D4 = 12;//black
int dpPIN = 13;
int Option = 1, Zahl;
bool Komma = true;


void setup() {                
  // initialize  the digital pins as outputs.
  pinMode(pinA, OUTPUT);     
  pinMode(pinB,  OUTPUT);     
  pinMode(pinC, OUTPUT);     
  pinMode(pinD, OUTPUT);     
  pinMode(pinE, OUTPUT);     
  pinMode(pinF, OUTPUT);     
  pinMode(pinG,  OUTPUT);   
  pinMode(dpPIN,  OUTPUT);   
  pinMode(D1, OUTPUT);  
  pinMode(D2, OUTPUT);  
  pinMode(D3,  OUTPUT);  
  pinMode(D4, OUTPUT);  
  Serial.begin(9600);
  DhtSensor.begin();
}

void loop() {
int Temperatur = DhtSensor.readTemperature()*10;
int Luftfeuchtigkeit = DhtSensor.readHumidity ()*10;
if (Option == 1) {
  Zahl = Temperatur;
  Komma = true;
  }
//else if () {

//  }

else {Zahl = Luftfeuchtigkeit; } 
Serial.print("Temperatur: ");
Serial.print(Zahl);
Serial.println("° Celsius");



if (Zahl>=0){ 
digitalWrite(D1, on);
digitalWrite(D2, off);
digitalWrite(D3, off);
digitalWrite(D4, off);
digitalWrite(dpPIN, LOW);
choice(Zahl/100);
delay (800);

digitalWrite(D1, off);
digitalWrite(D2, on); 
digitalWrite(D3, off);
digitalWrite(D4, off);
if (Komma){digitalWrite(dpPIN, HIGH);}
else {digitalWrite(dpPIN, LOW);}
choice ((Zahl%100)/10);
delay (800);

digitalWrite(D1, off);
digitalWrite(D2, off);
digitalWrite(D3, on); 
digitalWrite(D4, off);
digitalWrite(dpPIN, LOW);
choice (Zahl%10);
delay (800);

digitalWrite(D1, off);
digitalWrite(D2, off);
digitalWrite(D3, off);
digitalWrite(D4, on);
digitalWrite(dpPIN, LOW);
choice (Option + 9); // 10 for C , 11 for F , 12 for P
delay (800);
}
// Aufgabe 1 (8 Punkte). Die Aufgabe besteht darin, die Funktion loop ab diesem Punkt so zu ändern, dass auch eine negative Temperatur korrekt dargestellt wird. 
// Die Funktion für negative Werte heißt Minus() und wurde bereits geschrieben.
// ******************************
// Aufgabe 2 (4 Punkte). Diese Software wird auf einem Thermometer installiert, das in den USA verkauft wird. 
// Benutze die schon existierende Variable Option:
// Wenn Option = 1 oder Option = 3, bleibt die Variable Zahl unverändert.
// Wenn Option = 2, wird die Variable Zahl zuerst durch 10 dividiert und anschließend mit der Formel (Temp in Fahrenheit = Temp * 1.8 + 32) umgerechnet.
// Für die Benotung wird überprüft, ob die Umrechnung korrekt durchgeführt wurde und ob die Anzeige auf dem Display richtig ist. 
// Zur Kontrolle: 20 °C entsprechen 68 °F, und –40 °C entsprechen –40 °F. 
// Du kannst das Ergebnis der Zeile Serial.print(Zahl); im Serial Monitor überprüfen.


else if (Zahl <= -100){
}
else {


}

}

void zero () {
 digitalWrite(pinA, HIGH); 
 digitalWrite(pinB, HIGH);
 digitalWrite(pinC, HIGH);
 digitalWrite(pinD, HIGH);
 digitalWrite(pinE, HIGH);
 digitalWrite(pinF, HIGH);
 digitalWrite(pinG, LOW);
} 

void one (){
 digitalWrite(pinA, LOW);
 digitalWrite(pinB, HIGH); 
 digitalWrite(pinC, HIGH);
 digitalWrite(pinD, LOW);
 digitalWrite(pinE, LOW);
 digitalWrite(pinF, LOW);
 digitalWrite(pinG, LOW);
}

void two () {
 digitalWrite(pinA, HIGH);
 digitalWrite(pinB, HIGH);
 digitalWrite(pinC, LOW);
 digitalWrite(pinD, HIGH);
 digitalWrite(pinE, HIGH);
 digitalWrite(pinF, LOW);
 digitalWrite(pinG, HIGH);
}

void three () {
 digitalWrite(pinA, HIGH); 
 digitalWrite(pinB, HIGH);
 digitalWrite(pinC, HIGH);
 digitalWrite(pinD, HIGH);
 digitalWrite(pinE, LOW);
 digitalWrite(pinF, LOW);
 digitalWrite(pinG, HIGH);
}

void four (){
digitalWrite(pinA, LOW);
digitalWrite(pinB, HIGH);
digitalWrite(pinC, HIGH);
digitalWrite(pinD, LOW);
digitalWrite(pinE, LOW);
digitalWrite(pinF, HIGH);
digitalWrite(pinG, HIGH);
}

void five (){
digitalWrite(pinA, HIGH);
digitalWrite(pinB, LOW);
digitalWrite(pinC, HIGH);
digitalWrite(pinD, HIGH);
digitalWrite(pinE, LOW);
digitalWrite(pinF, HIGH);
digitalWrite(pinG, HIGH);
}

void six (){
digitalWrite(pinA, HIGH);
digitalWrite(pinB, LOW);
digitalWrite(pinC, HIGH);
digitalWrite(pinD, HIGH);
digitalWrite(pinE, HIGH);
digitalWrite(pinF, HIGH);
digitalWrite(pinG, HIGH);
}

void seven (){
digitalWrite(pinA, HIGH);
digitalWrite(pinB, HIGH);
digitalWrite(pinC, HIGH);
digitalWrite(pinD, LOW);
digitalWrite(pinE, LOW);
digitalWrite(pinF, LOW);
digitalWrite(pinG, LOW);
}

void eight (){
digitalWrite(pinA, HIGH);
digitalWrite(pinB, HIGH);
digitalWrite(pinC, HIGH);
digitalWrite(pinD, HIGH);
digitalWrite(pinE, HIGH);
digitalWrite(pinF, HIGH);
digitalWrite(pinG, HIGH);
}

void nine (){
digitalWrite(pinA, HIGH);
digitalWrite(pinB, HIGH);
digitalWrite(pinC, HIGH);
digitalWrite(pinD, HIGH);
digitalWrite(pinE, LOW);
digitalWrite(pinF, HIGH);
digitalWrite(pinG, HIGH);
}

void LetterC (){
digitalWrite(pinA, HIGH);
digitalWrite(pinB, LOW);
digitalWrite(pinC, LOW);
digitalWrite(pinD, HIGH);
digitalWrite(pinE, HIGH);
digitalWrite(pinF, HIGH);
digitalWrite(pinG, LOW);
}

void LetterF (){
digitalWrite(pinA, HIGH);
digitalWrite(pinB, LOW);
digitalWrite(pinC, LOW);
digitalWrite(pinD, LOW);
digitalWrite(pinE, HIGH);
digitalWrite(pinF, HIGH);
digitalWrite(pinG, HIGH);
}

void LetterP (){
digitalWrite(pinA, HIGH);
digitalWrite(pinB, HIGH);
digitalWrite(pinC, LOW);
digitalWrite(pinD, LOW);
digitalWrite(pinE, HIGH);
digitalWrite(pinF, HIGH);
digitalWrite(pinG, HIGH);
}

void Minus (){
digitalWrite(pinA, LOW);
digitalWrite(pinB, LOW);
digitalWrite(pinC, LOW);
digitalWrite(pinD, LOW);
digitalWrite(pinE, LOW);
digitalWrite(pinF, LOW);
digitalWrite(pinG, HIGH);
}
void choice (int Zahl){
switch (Zahl) {
  case 0:
    zero();
    break;
  case 1:
    one();
    break;
  case 2:
    two();
    break;
  case 3:
    three();
    break;
  case 4:
    four();
    break;
  case 5:
    five();
    break;
  case 6:
    six();
    break;
  case 7:
    seven();
    break;
   case 8:
    eight();
    break;
   case 9:
    nine();
    break;
   case 10:
    LetterC();
    break;
   case 11:
    LetterF();
    break;
   case 12:
    LetterP();
    break;
   case 13:
    Minus();
    break;
  }
}