#include <Wire.h>
//#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Thermistor.h>
#include <NTC_Thermistor.h>

Adafruit_SSD1306 display = Adafruit_SSD1306(128, 64, &Wire, -1);

#define SENSOR_PIN                A0
#define REFERENCE_RESISTANCE      95600
#define NOMINAL_RESISTANCE        100000
#define NOMINAL_TEMPERATURE       24
#define B_VALUE                   3950
#define STM32_ANALOG_RESOLUTION   4095

#define RelaisPinCooler           32

Thermistor* thermistor;

bool cooler = false;

void setup() {

  pinMode(RelaisPinCooler, OUTPUT);
  //digitalWrite(RelaisPinCooler, LOW);
  //Test

  display.begin(SSD1306_SWITCHCAPVCC,0x03C);
  display.setTextSize(2);
  display.setTextColor(1,0);
  display.clearDisplay();

  thermistor = new NTC_Thermistor(
    SENSOR_PIN,
    REFERENCE_RESISTANCE,
    NOMINAL_RESISTANCE,
    NOMINAL_TEMPERATURE,
    B_VALUE,
    STM32_ANALOG_RESOLUTION // <- for a thermistor calibration
  );

}

void loop() {

  const double celsius = thermistor->readCelsius();
//  const double kelvin = thermistor->readKelvin();
//  const double fahrenheit = thermistor->readFahrenheit();
  
  if 
    (celsius >= 60) {
      cooler = true;
      digitalWrite(RelaisPinCooler, 1);
    }
  else if 
    (celsius < 40) {
      cooler = false;
      digitalWrite(RelaisPinCooler, 0);
    }

  display.setCursor(0,0);
  display.println("Temperatur ");
  display.println(String(celsius) + " " + (char(247)) + "C");

  if 
    (cooler) {
      display.println("FAN ON");
    }
  else
    {
      display.println("FAN OFF");
    }
  
  display.display();
  delay(500);

  display.clearDisplay();
}