#define DHTTYPE DHT22   
const int chipSelect = 10;
const int DHTvcc = 6;
const int DHTdat = 5;
const int DHTgnd = 3;


const int timeRate = 5;

#include <dht.h>
#include <SdFat.h>

dht DHT;
double DHTtemp , DHThumid;
int DHTread;

SdFat sd;
SdFile logFile;

void setup() {
  // setup IO pins to power DHT11 / DHT22 sensor
  pinMode (DHTdat, INPUT_PULLUP); 
  pinMode (DHTvcc, OUTPUT);
  pinMode (DHTgnd, OUTPUT);
  digitalWrite(DHTvcc, HIGH);
  digitalWrite (DHTgnd, LOW);

  Serial.begin(57600);
  Serial.println("Pomiar temperatury i wilgotnosci z zapisem na karte SD");
  Serial.println("Dane zapisywane do log.csv na karcie MicroSD");
  
  delay(2000);
  DHTread = DHT.read22(DHTdat);
  switch (DHTread) {
    case DHTLIB_OK: Serial.println("Sensor OK.");
      break;
    default: Serial.println("ERROR: Problem z sensorem nie wykryto.");
  }
  `
  if (!sd.begin(chipSelect)) {
    Serial.println("ERROR karty SD .");
  } else {
    Serial.println("Karta SD ok!");
  }
}

void loop() {
  delay(timeRate * 1000); 
  if (!logFile.open("log.csv", O_RDWR | O_CREAT | O_AT_END)) { 
    sd.errorHalt("Blad pliku log.csv");
  } else {
    Serial.print("zapis danych. ");
  }
  DHTread = DHT.read22(DHTdat);
  DHTtemp = DHT.temperature;   
  DHThumid = DHT.humidity; 
  Serial.print("Temperatura: ");
  Serial.print(DHTtemp); Serial.print("C ");
  Serial.print(" Wilgotnosc: "); Serial.print(DHThumid);
    Serial.println("%");
  logFile.print(" Temperatura: ");logFile.print(DHTtemp); logFile.print(" C"); logFile.print(","); logFile.print(" Wilgotność  : "); logFile.println(DHThumid);logFile.print(" %"); // write data
  logFile.close();
}