#include <SPI.h>

#include <SD.h>
#include <dht.h>

dht DHT;

#define DHT22_PIN 5


struct {
  uint32_t total;
  uint32_t ok;
  uint32_t crc_error;
  uint32_t time_out;
  uint32_t connect;
  uint32_t ack_l;
  uint32_t ack_h;
  uint32_t unknown;
} stat = { 0, 0, 0, 0, 0, 0, 0, 0};



File myFile;

void setup() {

  // Open serial communications and wait for port to open:


  Serial.begin(9600);

  while (!Serial) {

    ; // wait for serial port to connect. Needed for native USB port only

  }

 //Serial.begin(115200);
  Serial.println("dht22_test.ino");
  Serial.print("LIBRARY VERSION: ");
  Serial.println(DHT_LIB_VERSION);
  Serial.println();
  Serial.println("Type,\tstatus,\tHumidity (%),\tTemperature (C)\tTime (us)");


  Serial.print("Initializing SD card...");


  if (!SD.begin(10)) {

    Serial.println("initialization failed!");

    while (1);

  }

  Serial.println("initialization done.");


  // open the file. note that only one file can be open at a time,

  // so you have to close this one before opening another.

  

}

void loop() {

 // READ DATA
  Serial.print("DHT22, \t");

  uint32_t start = micros();
  int chk = DHT.read22(DHT22_PIN);
  uint32_t stop = micros();
 uint32_t hitu = micros();

  stat.total++;
  switch (chk)
  {
    case DHTLIB_OK:
      stat.ok++;
      Serial.print("OK,\t");
      break;
    case DHTLIB_ERROR_CHECKSUM:
      stat.crc_error++;
      Serial.print("Checksum error,\t");
      break;
    case DHTLIB_ERROR_TIMEOUT:
      stat.time_out++;
      Serial.print("Time out error,\t");
      break;
    case DHTLIB_ERROR_CONNECT:
      stat.connect++;
      Serial.print("Connect error,\t");
      break;
    case DHTLIB_ERROR_ACK_L:
      stat.ack_l++;
      Serial.print("Ack Low error,\t");
      break;
    case DHTLIB_ERROR_ACK_H:
      stat.ack_h++;
      Serial.print("Ack High error,\t");
      break;
    default:
      stat.unknown++;
      Serial.print("Unknown error,\t");
      break;
  }

 myFile = SD.open("test.txt", FILE_WRITE);

  // DISPLAY DATA
  if (myFile) {
 Serial.print(DHT.humidity, 1);
  Serial.print(",\t");
  
  myFile.print(DHT.humidity, 1);
   myFile.print(",\t");


  Serial.print(DHT.temperature, 1);
  Serial.print(",\t");

  myFile.print(DHT.temperature, 1);
   myFile.print(",\t");

 hitu=stop - start;
 // Serial.print(stop - start);
  Serial.print(hitu);
  Serial.println();

  myFile.print(hitu);
  myFile.println();

  

    // close the file:
   
    myFile.close();

    Serial.println("done. tulis");

  } else {

    // if the file didn't open, print an error:

    Serial.println("error opening test.txt");

  }
 // re-open the file for reading:

  myFile = SD.open("test.txt");

  if (myFile) {

    Serial.println("test.txt:");


    // read from the file until there's nothing else in it:

    while (myFile.available()) {

      Serial.write(myFile.read());

    }

    // close the file:

    myFile.close();

  } else {

    // if the file didn't open, print an error:

    Serial.println("error opening test.txt");

  }



  if (stat.total % 20 == 0)
  {
    Serial.println("\nTOT\tOK\tCRC\tTO\tCON\tACK_L\tACK_H\tUNK");
    Serial.print(stat.total);
    Serial.print("\t");
    Serial.print(stat.ok);
    Serial.print("\t");
    Serial.print(stat.crc_error);
    Serial.print("\t");
    Serial.print(stat.time_out);
    Serial.print("\t");
    Serial.print(stat.connect);
    Serial.print("\t");
    Serial.print(stat.ack_l);
    Serial.print("\t");
    Serial.print(stat.ack_h);
    Serial.print("\t");
    Serial.print(stat.unknown);
    Serial.println("\n");
  }
  delay(2000);



}



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