#include "DHT.h"

#define DHTPIN 2       // Data pin
#define DHTTYPE DHT22  // Sensor type

DHT dht(DHTPIN, DHTTYPE);

// Optional calibration offsets
float tempOffset = 0.0;     // °C (adjust after testing)
float humidityOffset = 0.0; // %

void setup() {
  Serial.begin(9600);
  dht.begin();

  Serial.println("DHT22 Calibration Test");
  Serial.println("----------------------");
}

void loop() {

  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature(); // Celsius

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    delay(2000);
    return;
  }

  // Apply calibration offsets
  float calibratedTemp = temperature + tempOffset;
  float calibratedHumidity = humidity + humidityOffset;

  Serial.print("Raw Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  Serial.print("Calibrated Temperature: ");
  Serial.print(calibratedTemp);
  Serial.println(" °C");

  Serial.print("Raw Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  Serial.print("Calibrated Humidity: ");
  Serial.print(calibratedHumidity);
  Serial.println(" %");

  Serial.println("----------------------");

  delay(2000); // DHT22 recommended interval
}