#include <DHT.h>;
#include <SPI.h>
#include <SD.h>

//Constants
#define DHTPIN 2     // what pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino


//Variables
File textFile;
String data;//String of data combined for further processing.
float hum;  //Stores humidity value
float temp; //Stores temperature value
int count;  //Counter to recognize the data

void setup()
{
    Serial.begin(9600);
	dht.begin();
  Serial.print("Initializing SD card... ");

  if (!SD.begin(4)) {
    Serial.println("Card initialization failed!");
    while (true);
  }

  Serial.println("initialization done.");

  
  data = String();
  count = 0;
}

void loop()
{
    textFile = SD.open("data.txt", FILE_WRITE);
    //Read data and store it to variables hum and temp.
    hum = dht.readHumidity();
    temp= dht.readTemperature();
    //Combine data to one string.
    data = "(" +String(hum) + "," + temp + + ","+ count + "),";
    count++;
    //Print data value to serial monitor and sd card.
    Serial.print(data);
    textFile.println(data);
    textFile.close();
    delay(60000); //Delay 1 min.
}