#include <Wire.h>
#include "RTClib.h"
#include <SD.h>

Sd2Card SDcard;
SdVolume volume;

RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Domingo", "Segunda", "Terca", "Quarta", "Quinta", "Sexta", "Sabado"};
const int trigPin = 5;
const int echoPin = 6;
long duration;
float distance;


SdFat sdCard;
SdFile meuArquivo;

// Pino ligado ao CS do modulo
const int chipSelect = 4;

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(2, OUTPUT);
  Serial.begin(9600);
  while (!Serial);
  Serial.begin(57600);
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running!");

    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
    // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
  }
  //Inicia a comunicacao com o modulo SD
  if (!SD.begin(chipSelect))
  {
    Serial.println("Falha ao acessar o cartao !");
    Serial.println("Verifique o cartao/conexoes e reinicie o Arduino...");
    return;
  }
  Serial.println("Cartao iniciado corretamente !");
  Serial.println("Aguardando acionamento do push-button...");
  Serial.println();
}

}
void loop() {

  // put your main code here, to run repeatedly:
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delay(1000);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * (0.000347 / 2);
  Serial.print("Distancia: ");
  Serial.println(distance);
  DateTime now = rtc.now();

  Serial.print(now.day(), DEC);
  Serial.println();
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.year(), DEC);
  Serial.print(" (");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(") ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.print(now.second(), DEC);
  Serial.println();

  // Abrindo o arquivo txt com o nome arquivo
  File dataFile = SD.open("arquivo.txt", FILE_WRITE);
  // Gravando os dados no arquivo.txt
  if (dataFile)
    {
      dataFile.print("Distancia: ");
      dataFile.println(distance);
      dataFile.print(now.day(), DEC);
      dataFile.println();
      dataFile.print('/');
      dataFile.print(now.month(), DEC);
      dataFile.print('/');
      dataFile.print(now.year(), DEC);
      dataFile.print(" (");
      dataFile.print(daysOfTheWeek[now.dayOfTheWeek()]);
      dataFile.print(") ");
      dataFile.print(now.hour(), DEC);
      dataFile.print(':');
      dataFile.print(now.minute(), DEC);
      dataFile.print(':');
      dataFile.print(now.second(), DEC);
      dataFile.println();
      dataFile.close();

    }else{
           // Mensagem de erro caso ocorra algum problema
           // na abertura do arquivo
           Serial.println("Erro ao abrir arquivo.txt !");
         }
   delay(3000);
}