#include <Wire.h>
#include <LiquidCrystal_I2C.h>

const int ntcPin = A0;
const int redLED = 9;
const int greenLED = 10;
const int blueLED = 11;

LiquidCrystal_I2C lcd(0x27, 16, 2); // Prüfe ggf. I2C-Adresse mit Scanner

void setup() {
  pinMode(redLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(blueLED, OUTPUT);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Thermo-Stimmung");
  delay(1000);
  lcd.clear();

  Serial.begin(9600);
}

void loop() {
  int ntcValue = analogRead(ntcPin);
  Serial.print("NTC-Wert: ");
  Serial.println(ntcValue);

  // LCD-Anzeige
  lcd.setCursor(0, 0);
  lcd.print("NTC-Wert:       ");  // Löschen mit Leerzeichen
  lcd.setCursor(10, 0);
  lcd.print(ntcValue);

  // Farblogik
  if (ntcValue > 800) {
    // kalt → blau
    digitalWrite(blueLED, HIGH);
    digitalWrite(greenLED, LOW);
    digitalWrite(redLED, LOW);
    lcd.setCursor(0, 1);
    lcd.print("Status: Warm     ");
  } else if (ntcValue > 500) {
    // angenehm → grün
    digitalWrite(blueLED, LOW);
    digitalWrite(greenLED, HIGH);
    digitalWrite(redLED, LOW);
    lcd.setCursor(0, 1);
    lcd.print("Status: OK       ");
  } else {
    // warm → rot
    digitalWrite(blueLED, LOW);
    digitalWrite(greenLED, LOW);
    digitalWrite(redLED, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("Status: Kalt     ");
  }

  delay(300);
}