const int thermistorPin = 34;  // Analog pin connected to the thermistor
const int resistorValue = 10000;  // Resistance value of the resistor
const int bufferSize = 10800;  // Size of the circular buffer
float buffer[bufferSize];  // Circular buffer to hold the temperature readings
int writeIndex = 0;  // Index to write the next reading
int numReadings = 0;  // Number of readings currently stored

float highestValue = -273.15; // Initialize with lowest possible temperature
float lowestValue = 1000.0; // Initialize with highest possible temperature
float overallAverage = 0.0;
unsigned long startTime = millis(); // Start time in milliseconds
unsigned long tenMinuteInterval = 600000; // 10 minutes in milliseconds
unsigned long previousIntervalTime = 0; // Time of the previous 10-minute interval

void setup() {
  Serial.begin(115200);
}

void loop() {
  // Read the analog value from the thermistor
  int rawValue = analogRead(thermistorPin);

  // Convert the raw value to resistance
  float voltage = rawValue * (3.3 / 4095.0);  // Convert raw value to voltage (assuming 3.3V reference)
  float resistance = (resistorValue * voltage) / (3.3 - voltage);

  // Calculate the temperature in Celsius using the Steinhart-Hart equation
  float steinhart;
  steinhart = log(resistance / 10000.0);  // (R/Ro)
  steinhart /= 3950.0;  // 1/B * ln(R/Ro)
  steinhart += 1.0 / (25 + 273.15);  // + (1/To)
  steinhart = 1.0 / steinhart;  // Invert
  steinhart -= 273.15;  // Convert to Celsius

  // Store the temperature reading in the circular buffer
  buffer[writeIndex] = steinhart;
  writeIndex = (writeIndex + 1) % bufferSize;

  // Update the number of readings stored (limited to bufferSize)
  numReadings = min(numReadings + 1, bufferSize);

  // Update the highest and lowest values
  highestValue = max(highestValue, steinhart);
  lowestValue = min(lowestValue, steinhart);

  // Calculate the overall average
  overallAverage = ((overallAverage * (numReadings - 1)) + steinhart) / numReadings;

  // Check if a 10-minute interval has elapsed
  unsigned long currentTime = millis();
  if (currentTime - previousIntervalTime >= tenMinuteInterval) {
    // Output the 10-minute average
    float tenMinuteAverage = 0.0;
    for (int i = 0; i < numReadings; i++) {
      int readIndex = (writeIndex + bufferSize - numReadings + i) % bufferSize;
      tenMinuteAverage += buffer[readIndex];
    }
    tenMinuteAverage /= numReadings;

    Serial.print("10-minute average: ");
    Serial.print(tenMinuteAverage);
    Serial.println(" °C");

    // Print the highest value, lowest value, and overall average
    Serial.print("Highest value: ");
    Serial.print(highestValue);
    Serial.println(" °C");
    Serial.print("Lowest value: ");
    Serial.print(lowestValue);
    Serial.println(" °C");
    Serial.print("Overall average: ");
    Serial.print(overallAverage);
    Serial.println(" °C");

    // Reset the previous interval time
    previousIntervalTime = currentTime;
  }

  // Print the stored temperature readings
  Serial.println("Stored temperature readings:");
  for (int i = 0; i < numReadings; i++) {
    int readIndex = (writeIndex + bufferSize - numReadings + i) % bufferSize;
    Serial.print("Reading ");
    Serial.print(i + 1);
    Serial.print(": ");
    Serial.print(buffer[readIndex]);
    Serial.println(" °C");
  }
  Serial.println();

  // Check if the desired number of readings is reached
  if (numReadings >= bufferSize) {
    while (true) {
      // Stay in an infinite loop to prevent further execution
    }
  }

  delay(1000);  // Delay between readings
}