/* How to use the DHT-22 sensor with Arduino uno
   Temperature and humidity sensor
*/
//Libraries
#include <DHT.h>;
//Constants
const int ldrPin = A0; // Analog pin for LDR sensor
const int ledPin = 9; // Digital pin for LED
const int threshold = 150;
#define DHTPIN 7
#define LED 4
#define DHTTYPE DHT22 // DHT 22 (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino
//Variables
int chk;
float hum; //Stores humidity value
float temp; //Stores temperature value
void setup()
{
  pinMode(ledPin, OUTPUT);
  pinMode(LED, OUTPUT);
  Serial.begin(9600);
  dht.begin();
}
void loop()
{
    delay(10);
    //Read data and store it to variables hum and temp
    hum = dht.readHumidity();
    temp= dht.readTemperature();
    //Print temp and humidity values to serial monitor
    Serial.print("Humidity: ");
    Serial.print(hum);
    Serial.print(" %, Temp: ");
    Serial.print(temp);
    Serial.println(" Celsius");
    if(temp>40){
      digitalWrite(LED, HIGH);
    }
    else
    {
      digitalWrite(LED, LOW);
    }
    delay(10); //Delay 2 sec.
    int ldrValue = analogRead(ldrPin);
    // Print the LDR value to the serial monitor (optional)
    Serial.print("LDR Value: ");
    Serial.println(ldrValue);
    // Check if the LDR value is less than the threshold
    if (ldrValue < 150) {
      digitalWrite(ledPin, HIGH);
       // Turn on the LED
    } else {
      digitalWrite(ledPin, LOW);
    // Turn off the LED
    }
    delay(100); // Delay for a second (adjust as needed)
}