Exception when trying to write date/time

[marcelocampilima]

Hello,

I am using the library DS3232RTC on a project based on ESP32. It is happening something that I tried to figure out but I have not been able to.

When I try to update the Date using "write(tmElements_t)" I get an exception and the system restarts. One thing that is really strange to me is the date when "read(tmElements_t)" before writing.

Below you can see the code and after the debug of the data.

// set the current date void setCurrentDate(){ tmElements_t currentDateTime;

byte currentDay = 4; byte currentMonth = 3; byte currentYear = 2021 - 1970; byte currentWeekDay = 5;

rtcClock.read(currentDateTime); Serial.print("Date before updating: "); Serial.print(currentDateTime.Month, DEC); Serial.print("/"); Serial.print(currentDateTime.Day, DEC); Serial.print("/"); Serial.println(currentDateTime.Year + 1970, DEC); Serial.print("Weekday: "); Serial.println(currentDateTime.Wday, DEC);

// Set the date currentDateTime.Day = currentDay; currentDateTime.Month = currentMonth; currentDateTime.Year = currentYear; currentDateTime.Wday = currentWeekDay;

Serial.print("Date after setup: "); Serial.print(currentDateTime.Month, DEC); Serial.print("/"); Serial.print(currentDateTime.Day, DEC); Serial.print("/"); Serial.println(currentDateTime.Year + 1970, DEC); Serial.print("Weekday: "); Serial.println(currentDateTime.Wday, DEC);

// writing the date to RTC rtcClock.write(currentDateTime);

rtcClock.read(currentDateTime); Serial.print("Date after updating: "); Serial.print(currentDateTime.Month, DEC); Serial.print("/"); Serial.print(currentDateTime.Day, DEC); Serial.print("/"); Serial.println(currentDateTime.Year + 1970, DEC); Serial.print("Weekday: "); Serial.println(currentDateTime.Wday, DEC); }

Date before updating: 252/98/2033 Weekday: 240 Date after setup: 3/4/2021 Weekday: 5 Guru Meditation Error: Core 0 panic'ed (IntegerDivideByZero). Exception was unhandled. Core 0 register dump: PC : 0x400d961f PS : 0x00060630 A0 : 0x800d99ba A1 : 0x3ffcfce0
A2 : 0x00000133 A3 : 0x00000000 A4 : 0x00000032 A5 : 0x3ffbedb8
A6 : 0x00004e20 A7 : 0x60013000 A8 : 0x00000113 A9 : 0x3ffcfcc0
A10 : 0x00000000 A11 : 0x00000000 A12 : 0x3ffe17b4 A13 : 0x00000001
A14 : 0x00002710 A15 : 0x3ffbedb8 SAR : 0x00000013 EXCCAUSE: 0x00000006
EXCVADDR: 0x00000000 LBEG : 0x4000c46c LEND : 0x4000c477 LCOUNT : 0x00000000

Backtrace: 0x400d961f:0x3ffcfce0 0x400d99b7:0x3ffcfd10 0x400d3a5d:0x3ffcfd30 0x400d3ab1:0x3ffcfd50 0x400d3ba5:0x3ffcfd70 0x400d3e56:0x3ffcfd90 0x400d3e91:0x3ffcfdb0 0x400d3f74:0x3ffcfde0 0x400d2543:0x3ffcfe00 0x400d27f7:0x3ffcfe30 0x400d1c82:0x3ffcfe60 0x400d1d67

Thanks in advance.

[JChristensen]

I cannot duplicate the issue. I do not have an ESP32, but the code below appears to run fine on an Uno. Sorry.

#include <DS3232RTC.h>      // https://github.com/JChristensen/DS3232RTC

DS3232RTC rtcClock;

void setup()
{
    Serial.begin(115200);
    rtcClock.begin();
    setCurrentDate();
}

void loop()
{
}

// set the current date
void setCurrentDate()
{
    tmElements_t currentDateTime;

    byte currentDay = 4;
    byte currentMonth = 3;
    byte currentYear = 2021 - 1970;
    byte currentWeekDay = 5;

    rtcClock.read(currentDateTime);
    Serial.print("Date before updating: ");
    Serial.print(currentDateTime.Month, DEC);
    Serial.print("/");
    Serial.print(currentDateTime.Day, DEC);
    Serial.print("/");
    Serial.println(currentDateTime.Year + 1970, DEC);
    Serial.print("Weekday: ");
    Serial.println(currentDateTime.Wday, DEC);

    // Set the date
    currentDateTime.Day = currentDay;
    currentDateTime.Month = currentMonth;
    currentDateTime.Year = currentYear;
    currentDateTime.Wday = currentWeekDay;

    Serial.print("Date after setup: ");
    Serial.print(currentDateTime.Month, DEC);
    Serial.print("/");
    Serial.print(currentDateTime.Day, DEC);
    Serial.print("/");
    Serial.println(currentDateTime.Year + 1970, DEC);
    Serial.print("Weekday: ");
    Serial.println(currentDateTime.Wday, DEC);

    // writing the date to RTC
    rtcClock.write(currentDateTime);

    rtcClock.read(currentDateTime);
    Serial.print("Date after updating: ");
    Serial.print(currentDateTime.Month, DEC);
    Serial.print("/");
    Serial.print(currentDateTime.Day, DEC);
    Serial.print("/");
    Serial.println(currentDateTime.Year + 1970, DEC);
    Serial.print("Weekday: ");
    Serial.println(currentDateTime.Wday, DEC);
}

Output:

Date before updating: 1/1/2000
Weekday: 1
Date after setup: 3/4/2021
Weekday: 5
Date after updating: 3/4/2021
Weekday: 5

[marcelocampilima]

Hi,

Thank you for your reply.

Could you see these numbers when reading from RTC? Date before updating: 252/98/2033 Weekday: 240

What do you think this can be?

Best regards

[JChristensen]

All the numbers looked good. See my output above. I have no idea what might be going on, sorry.

[marcelocampilima]

ok. Thank you, anyway.

Best regards.