#include <DHTesp.h>

// Constants for DHT sensor
const int DHT_PIN = 15;

// Constants for photoresistor calibration
const float GAMMA = 0.7;
const float RL10 = 50;

// Creating an instance of the DHTesp class
DHTesp dhtSensor;

// Define the pin connected to the photoresistor
const int PHOTO_RESISTOR_PIN = 2; // Example pin, adjust according to your setup

void setup() {
  // Initializing serial communication
  Serial.begin(115200);

  // Configuring the DHT sensor
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop() {
  // Reading temperature and humidity from DHT sensor
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  
  // Printing temperature and humidity
  Serial.print("Temperature: ");
  Serial.print(data.temperature, 2); // Two decimal places for temperature
  Serial.println(" °C");
  
  Serial.print("Humidity: ");
  Serial.print(data.humidity, 1); // One decimal place for humidity
  Serial.println("%");
  
  // Reading analog value from photoresistor pin
  int analogValue = analogRead(PHOTO_RESISTOR_PIN);

  // Convert analog value to voltage (assuming 12-bit ADC and 3.3V reference)
  float voltage = analogValue / 4095.0 * 3.3;

  // Calculate resistance of the photoresistor using voltage divider formula
  float resistance = 2000 * voltage / (3.3 - voltage);

  // Calculate lux using the resistance and predefined calibration values
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  // Print the lux value
  Serial.print("Lux: ");
  Serial.println(lux / 10);

  // Adding a delay for readability
  delay(2000);
}