#include <Wire.h>

#include <LiquidCrystal_I2C.h> // Vorher hinzugefügte LiquidCrystal_I2C Bibliothek hochladen
LiquidCrystal_I2C lcd1(0x27, 20, 4); 
LiquidCrystal_I2C lcd2(0x20, 20, 4); 

int taster1=12;//G1-
int taster2=14;//G2-
int taster3=27;//G3-
int taster4=26;//G4-
int taster5=5;//G1+
int taster6=18;//G2+
int taster7=19;//G3+
int taster8=23;//G4+
int tasterPfand=4;//Pfand-


int tasterstatus=0; 
int G1=0;     //Bestellmenge Glühwein
float P1=3.5; //PReis für Glühwein
float S1=0;   //Summe Glühwein
int G2=0;     //Bestellmenge 
float P2=4.5; //PReis für 
float S2=0;   //Summe 
int G3=0;     //Bestellmenge 
float P3=4.0; //PReis für 
float S3=0;   //Summe 
int G4=0;     //Bestellmenge 
float P4=1.0; //PReis für 
float S4=0;   //Summe 
float Summe=0; //Gesamtsumme
int Pfand=0;  //Anzahl der Getränke
int Pfandback=0; //Pfand zurück
//lcd1.print("\xF5"); // das ist ein ü
//ä : \xE1
//ö : \xEF
//ü : \xF5
//ß : \xE2


void setup() {
  Wire.begin();
  Serial.begin(115200);
  Serial.println("SF-Nordvelen");
  Serial.println("Glühwein-Rechner");

  pinMode(taster1, INPUT);
  pinMode(taster2, INPUT);
  pinMode(taster3, INPUT);
  pinMode(taster4, INPUT);
  pinMode(taster5, INPUT);
  pinMode(taster6, INPUT);
  pinMode(taster7, INPUT);
  pinMode(taster8, INPUT);
  lcd1.init(); //Im Setup wird das LCD2 gestartet
  lcd1.backlight();
  lcd2.init(); //Im Setup wird das LCD2 gestartet
  lcd2.backlight();
  lcd1.setCursor(3,0); 
  lcd1.print("Gluehwein");
  lcd1.setCursor(3,1); 
  lcd1.print("Gl");
  lcd1.print("\xF5");
  lcd1.print("hwein+");
  lcd1.setCursor(3,2); 
  lcd1.print("Kakao");
  lcd1.setCursor(3,3); 
  lcd1.print("Schneemann");

  lcd2.setCursor(3,0); 
  lcd2.print("SF-Nordvelen");
  lcd2.setCursor(3,1); 
  lcd2.print("Gl");
  lcd2.print("\xF5");
  lcd2.print("hweinrechner");

}
 
void loop() {
  

lcd1.setCursor(0,0); 
lcd1.print("   ");
lcd1.setCursor(0,0); 
lcd1.print(G1);
lcd1.setCursor(15,0); 
lcd1.print("     ");
lcd1.setCursor(15,0); 
S1=G1*P1;
lcd1.print(S1);

lcd1.setCursor(0,1); 
lcd1.print("   ");
lcd1.setCursor(0,1); 
lcd1.print(G2);
lcd1.setCursor(15,1); 
lcd1.print("     ");
lcd1.setCursor(15,1); 
S2=G2*P2;
lcd1.print(S2);

lcd1.setCursor(0,2); 
lcd1.print("   ");
lcd1.setCursor(0,2); 
lcd1.print(G3);
lcd1.setCursor(15,2); 
lcd1.print("     ");
lcd1.setCursor(15,2); 
S3=G3*P3;
lcd1.print(S3);

lcd1.setCursor(0,3); 
lcd1.print("   ");
lcd1.setCursor(0,3); 
lcd1.print(G4);
lcd1.setCursor(15,3); 
lcd1.print("     ");
lcd1.setCursor(15,3); 
S4=G4*P4;
lcd1.print(S4);


Pfand=G4+G3+G2+G1-Pfandback;
if (Pfand<0)
{
  Pfandback=0;
}
lcd2.setCursor(0,2); 
lcd2.print("   ");
lcd2.setCursor(0,2); 
lcd2.print(Pfand);
lcd2.setCursor(3,2);
lcd2.print("Pfand:");
lcd2.setCursor(11,2); 
lcd2.print("     ");
lcd2.setCursor(11,2); 
Summe = Pfand * 2;
lcd2.print(Summe);


lcd2.setCursor(3,3); 
lcd2.print("Summe:");
lcd2.setCursor(11,3); 
lcd2.print("     ");
lcd2.setCursor(11,3); 
Summe=S4+S3+S2+S1;
lcd2.print(Summe);

delay(100);

tasterstatus=digitalRead(taster1); 
if (tasterstatus == HIGH)
{ 
  G1=G1-1;
  if (G1<0) { G1=0;}
} 
tasterstatus=digitalRead(taster5); 
if (tasterstatus == HIGH)
{ 
  G1=G1+1;
} 

tasterstatus=digitalRead(taster2); 
if (tasterstatus == HIGH)
{ 
  G2=G2-1;
  if (G2<0) { G2=0;}
} 
tasterstatus=digitalRead(taster6); 
if (tasterstatus == HIGH)
{ 
  G2=G2+1;
} 
tasterstatus=digitalRead(taster3); 
if (tasterstatus == HIGH)
{ 
  G3=G3-1;
  if (G3<0) { G3=0;}
} 
tasterstatus=digitalRead(taster7); 
if (tasterstatus == HIGH)
{ 
  G3=G3+1;
} 

tasterstatus=digitalRead(taster4); 
if (tasterstatus == HIGH)
{ 
  G4=G4-1;
  if (G4<0) { G4=0;}
} 
tasterstatus=digitalRead(taster8); 
if (tasterstatus == HIGH)
{ 
  G4=G4+1;
} 


tasterstatus=digitalRead(tasterPfand); 
if (tasterstatus == HIGH)
{ 
  Pfandback=Pfandback+1;
} 

}