I have an interface problem that i hope someone can solve.
I am using a Wemos mini D1 and I wish to connect up a micro sd card and an RTC but the two seem to be incompatible. The RTC is a DS3231 and I have used the library by Makuna which is recommended and supposed to be compatible with the WEmos D1 mini.
Individually they both work fine, but not together. I have attached a code that first initialises the RTC and then after 10 seconds initialises the SD card.
to start with the date and time are correct but a soon as the SD card is opened the date is rubbish.
Any help would be appreciated. Thanks
#include <Wire.h>
#include "RTClib.h"
#include <SD.h>
#include <SPI.h>
RTC_DS3231 rtc;
int sec = 0;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
void openSD() {
Serial.println();
Serial.println("Open SD card");
if (!SD.begin(4)) {
Serial.println("Open SD card failed");
return;
}
Serial.println("SD card open");
}
void setup () {
#ifndef ESP8266
while (!Serial); // for Leonardo/Micro/Zero
#endif
Serial.begin(9600);
delay(3000); // wait for console opening
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
while (1);
}
if (rtc.lostPower()) {
Serial.println("RTC lost power, lets set the time!");
// following line sets the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(DATE), F(TIME)));
// This line sets the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
}
}
void loop () {
DateTime now = rtc.now();
Serial.print(now.year(), DEC);
Serial.print('/');
Serial.print(now.month(), DEC);
Serial.print('/');
Serial.print(now.day(), 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();
sec++;
Serial.println(sec);
if (sec == 10)
openSD();
Serial.println();
delay(1000);
}