#include "DHT.h" //DHT Bibliothek laden
#define DHTTYPE DHT22    
int DHTPIN = A0;
DHT DhtSensor (DHTPIN, DHTTYPE);
//DHT11 HW: Mit Blick auf die Vorderseite des DHT11 wird der linke
// Kontakt mit Pin 3,
// der mittlere mit 5V und der rechte mit GND 
// am Mikrocontroller verbunden. 
int pinA = 2;
int pinB = 3;
int pinC  = 4;
int pinD = 5;
int pinE = 6;
int pinF = 7;
int pinG = 8;
int D1 = 9;
int D2 = 10; 
int D3 = 11;
int D4 = 12;
int DP = 13;
int RLed = A1;
int GLed = A2;
#define HIGH 1
#define LOW 0
int on = 0 , off = 1;
float Delta = 0;

void setup() {
  pinMode(DHTPIN, INPUT);
  DhtSensor.begin(); //DHT Sensor starten
  Serial.begin( 9600); //Serielle Verbindung starten
  pinMode(pinA, OUTPUT);     
  pinMode(pinB, OUTPUT);     
  pinMode(pinC, OUTPUT);     
  pinMode(pinD, OUTPUT);     
  pinMode(pinE, OUTPUT);     
  pinMode(pinF, OUTPUT);     
  pinMode(pinG, OUTPUT);   
  pinMode(D1, OUTPUT);  
  pinMode(D2, OUTPUT);  
  pinMode(D3, OUTPUT);  
  pinMode(D4, OUTPUT);  
  pinMode(DP, OUTPUT);
  pinMode(RLed, OUTPUT);
  pinMode(GLed, OUTPUT);
}

void loop() {
 float Temp = DhtSensor.readTemperature();
 int x = Temp*10 + Delta;
 Serial.print("Die Temperatur beträgt: ");
 Serial.print(Temp + Delta/10);
 Serial.println("°C");
 // wenn Temp < 21 °C (x < 210) GLed einschalten 
 // und schrittweise die Variable Delta um 1 erhöhen
 // und zu x addieren
 // (d.h. die Temperatur um 0.1 Grad erhöhen) 
  // wenn Temp > 21 °C (x > 200) GRed einschalten 
 // und schrittweise die Variable die Variable Delta um 1 
 // verkleinen und zu x addieren
 // (d.h. die Temperatur um 0.1 Grad verkleinen) 

if (x<210) {  // if Temp < 21°C
  digitalWrite(GLed, HIGH);
  digitalWrite(RLed, LOW);
  Delta= Delta +1;
}
else {
  digitalWrite(RLed, HIGH);
  digitalWrite(GLed, LOW);
  Delta = Delta-1;
 }

 if (Temp >=0 ) {
  digitalWrite(D1, on);
  digitalWrite(D2, off);
  digitalWrite(D3, off);
  digitalWrite(D4, off);
  Auswahl(x/100);
  delay (700);

  digitalWrite(D1, off);
  digitalWrite(D2, on);
  digitalWrite(D3, off);
  digitalWrite(D4, off);
  digitalWrite(DP, HIGH);
  Auswahl ((x%100)/10);
  delay (700);

  digitalWrite(DP, LOW);
  digitalWrite(D1, off);
  digitalWrite(D2, off);
  digitalWrite(D3, on);
  digitalWrite(D4, off);
  Auswahl(x%10);
  delay (700);

  digitalWrite(D1, off);
  digitalWrite(D2, off);
  digitalWrite(D3, off);
  digitalWrite(D4, on);
  Auswahl (10);
 }
 else {
  digitalWrite(D1, on);
  digitalWrite(D2, off);
  digitalWrite(D3, off);
  digitalWrite(D4, off);
  Auswahl(11);
  delay (700);

  digitalWrite(D1, off);
  digitalWrite(D2, on);
  digitalWrite(D3, off);
  digitalWrite(D4, off);
  Auswahl(-x/100);
  delay (700);

  digitalWrite(D1, off);
  digitalWrite(D2, off);
  digitalWrite(D3, on);
  digitalWrite(D4, off);
  Auswahl ((-x%100)/10);
  delay (700);

  digitalWrite(D1, off);
  digitalWrite(D2, off);
  digitalWrite(D3, off);
  digitalWrite(D4, on);
  Auswahl (10);


  }
 delay (700);
}

void Auswahl (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:
    Minus();
    break;

  }

}

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