#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);


#define TASTER 8
#define LED_R 7
unsigned long alteMillisTemp = 0; 
const long intervallTemp = 5000; 
int sensorpin1 = A0;
float value; 
int anzahlMessung = 10;
int TempDigiSumme = 0;
float Mittelwert;
unsigned long aktuellMillisTemp = millis();

void setup()
{
  pinMode(LED_R, OUTPUT);
  pinMode(TASTER, INPUT_PULLUP);
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
}
void loop()
{
digitalWrite(LED_R, Schalter());

float sensorTemp = analogRead(sensorpin1);

LCD(Temperatur(sensorTemp));

Serial.print("TemperaturDigiwert: ");
Serial.println(sensorTemp);

}

bool Schalter(){
  static bool Status = LOW;
  static bool Flankenmerker = LOW;

if(digitalRead(TASTER) == LOW && Flankenmerker == LOW){
Flankenmerker = HIGH;
Status = !Status;
Serial.print("Status:  ");
if(Status == LOW) Serial.println("Ein");
else Serial.println("Aus");
delay(20);
}

if(digitalRead(TASTER) == HIGH){
  Flankenmerker = LOW;
  delay(20);
}
return Status;
}

float Temperatur(float sensorTemp) {



  for (int i = 0; i < anzahlMessung; i++) {
    TempDigiSumme = TempDigiSumme + sensorTemp;
  }

  Mittelwert = TempDigiSumme / anzahlMessung;

  if (digitalRead(TASTER) == LOW) {
    value = ((Mittelwert * 5.0 * 100) / 1023.0);
    return value;
  }
}


void LCD(float Schalter) {

  lcd.setCursor(0, 0);
  lcd.print("Temp.:");
  lcd.setCursor(6, 0);
  lcd.print(Schalter);
  lcd.setCursor(10, 0);
  lcd.print("\337C");
}