const int thermistorPin = 2;
const double baseResist = 10000.0;
const double baseTemp = 25.0;
const double resistTempCoefficientB = 3950.0;
const double seriesResistor = 10000.0;
const unsigned long timerDuration = 240 * 60 * 1000;   // 24 hours
const unsigned long calcAverageTiming = 10 * 60 * 1000;   // 10 minutes
unsigned long startTime;
//set integers, floats, etc
unsigned long lastAverageCalc;
unsigned long lastTempCheck;
unsigned long currentTime;
unsigned long passedTime;
int tempDataArray[240 * 60]; //1 data point per 24 hrs
int numOfData = 0;


void setup() {
  Serial.begin(38400);
  startTime = millis();
  lastAverageCalc = startTime;
  lastTempCheck = startTime; // set times to match
}
// gather averages of data for set period
double calcCurrentAvg() {
  double allData = 0;
  int numSamples = numOfData;
  if (numSamples > calcAverageTiming / 1000) {
    numSamples = calcAverageTiming / 1000;//determine number of samples


  }
  //add data to allData
  for (int i = 0; i < numSamples; ++i) {
    allData += tempDataArray[numOfData - 1 - i];
  }
  //determine the average temp for all data.
  double average = allData / numSamples;
  return average;
}


void loop() {
  currentTime = millis();
  passedTime = currentTime - startTime;
  //end loop
  if (passedTime >= timerDuration) {

    return;
  }

//this determines when to print the 10 minute average
  if (currentTime - lastAverageCalc >= calcAverageTiming) {
    double rollingAvg = calcCurrentAvg();
    Serial.println("10 min average: ");
    Serial.println(rollingAvg);
    lastAverageCalc = currentTime;
  }


  if (currentTime - lastTempCheck >= 1000 && numOfData < (timerDuration / 1000)) {
    //gather data per second
    int rawValue = analogRead(thermistorPin); 
    double resistance = seriesResistor * (4095.0 / rawValue - 1.0);
    //calc temperature with steinhart equation
    double resistTempCalc;
    resistTempCalc = resistance / baseResist;
    resistTempCalc = log(resistTempCalc);
    resistTempCalc /= resistTempCoefficientB;
    resistTempCalc += 1.0 / (baseTemp + 273.15);
    resistTempCalc = 1.0 / resistTempCalc;
    resistTempCalc = resistTempCalc - 273.15;
    resistTempCalc = resistTempCalc * 1.80;


    double temperature = resistTempCalc + 30.0;
    tempDataArray[numOfData] = temperature;
    ++numOfData;
    Serial.println(temperature);
    lastTempCheck = currentTime;
  }
}