#include <DHT.h>

#define DATA_PIN 13
#define READINGS_COUNT 10

DHT sensor(DATA_PIN, DHT22);

float temperatureReadings[READINGS_COUNT];
int readingsIndex = 0;

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

void readAndDisplayData() {
  sensor.read();
  float temp = sensor.readTemperature();
  Serial.print("Temperature: ");
  Serial.print(temp);
  Serial.println("°C");
  
  // Store temperature reading in the array
  temperatureReadings[readingsIndex] = temp;
  readingsIndex = (readingsIndex + 1) % READINGS_COUNT;
}

void calculateAndDisplayStatistics() {
  float minTemp = temperatureReadings[0];
  float maxTemp = temperatureReadings[0];
  float sumTemp = temperatureReadings[0];

  for (int i = 1; i < READINGS_COUNT; i++) {
    float temp = temperatureReadings[i];
    sumTemp += temp;

    if (temp < minTemp) {
      minTemp = temp;
    }

    if (temp > maxTemp) {
      maxTemp = temp;
    }
  }

  float averageTemp = sumTemp / READINGS_COUNT;

  // Calculate standard deviation
  float sumSquaredDifferences = 0;
  for (int i = 0; i < READINGS_COUNT; i++) {
    float difference = temperatureReadings[i] - averageTemp;
    sumSquaredDifferences += difference * difference;
  }
  float standardDeviation = sqrt(sumSquaredDifferences / READINGS_COUNT);

  Serial.print("Min Temperature: ");
  Serial.print(minTemp);
  Serial.print("°C, Max Temperature: ");
  Serial.print(maxTemp);
  Serial.print("°C, Average Temperature: ");
  Serial.print(averageTemp);
  Serial.print("°C, Standard Deviation: ");
  Serial.println(standardDeviation);
}

void loop() {
  // Read and display temperature every second
  readAndDisplayData();
  delay(1000);
  
  // Calculate and display statistics every 10 seconds
  static unsigned long lastStatisticsTime = 0;
  if (millis() - lastStatisticsTime >= 10000) {
    calculateAndDisplayStatistics();
    lastStatisticsTime = millis();
  }
}