rtc_sd_controle_II.ino

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

File myFile;
RTC_DS1307 rtc;
String stringOne;
String Stringyear = "2010";
String Stringmonth = "01";
String Stringday   = "01";
unsigned long atual;
unsigned long anterior = 0;
const long intervalo = 60000;
unsigned long val = 0.00;
unsigned long s;
float media;
//-----------------------------------------------------------------
void setup () {
  Serial.begin(115200);
  if (!SD.begin(15)) {
    return;
  }
  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__)));
  }
}
//-----------------------------------------------------------------
void loop () {
  DateTime now = rtc.now();
  if ((now.hour() == 17) && (now.minute() == 59) && (now.second() == 0))
  {
    Stringyear = now.year(), DEC;
    Stringmonth = now.month(), DEC;
    Stringday = now.day(), DEC;
  }
  stringOne = Stringyear + "/" + Stringmonth + "/" + Stringday + ".txt";
  if ((now.hour() < 6) || (now.hour() > 18))
  {
    atual = millis();
    if (anterior != atual)
    {
      int valor = analogRead (A0);
      val = val + valor;
      s = s + 1.00;
      if (atual - anterior >= intervalo )
      {
        anterior = atual;
        media = (val * 3.2226) / s;
        myFile = SD.open(stringOne, FILE_WRITE);
        if (myFile) {
          DateTime now = rtc.now();
          myFile.print(now.hour(), DEC);
          myFile.print(':');
          myFile.print(now.minute(), DEC);
          myFile.print(" \t");
          myFile.println(media);
          myFile.close();
          Serial.println('.');
        }
        s = 0.00;
        val = 0.00;
      }
    }
  }
  else
  {
    s = 0.00;
    val = 0.00;
    media = 0.00;
    Serial.print(".");
  }
}