#include <DHT.h>
#define DHTTYPE DHT22 // Mit Arduino dann DHT11 schreiben
int DHTPIN = A0;
DHT DhtSensor (DHTPIN, DHTTYPE);
//DHT11 HW: Mit Blick auf die Vorderseite des DHT11 wird der linke Kontakt mit Pin 13,
// der mittlere mit 5V und der rechte mit GND am Mikrocontroller verbunden.
//invert HIGH, LOW, on, off for Arduino HW if needed (Cathode Display)
#define HIGH 1
#define LOW 0
int on = 0 , off = 1;
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 Zeit = 700;

void setup() {
  Serial.begin(9600);
  DhtSensor.begin ();
  pinMode(DHTPIN , INPUT);  

  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);  
}

void loop() {
  float Temp = DhtSensor.readTemperature();
  int Zahl = Temp *10;
  Serial.print("Temperatur: ");
  Serial.print(Temp);
  Serial.println("°C");

  digitalWrite(D1, on);
  digitalWrite(D2, off);
  digitalWrite(D3, off);
  digitalWrite(D4, off);
  choice(random(0,10));
  delay (Zeit);

  digitalWrite(D1, off);
  digitalWrite(D2, on);
  digitalWrite(D3, off);
  digitalWrite(D4, off);
  choice(random(0,10));
  delay (Zeit);

  digitalWrite(D1, off);
  digitalWrite(D2, off);
  digitalWrite(D3, on);
  digitalWrite(D4, off);
  choice(random(0,10));
  delay (Zeit);

  digitalWrite(D1, off);
  digitalWrite(D2, off);
  digitalWrite(D3, off);
  digitalWrite(D4, on);
  choice(random(0,10));
  delay (Zeit);
}

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 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;
  }
}