im working on a timer using ds1307 but im facing a problem when i set the start time lets say to 23:00 & stop time to 00:05

here is the code to turn on
if ((out1TimeControl) == 0 && (settingsDisplay1) == 0) {
if ((out1OffTimeSetHours) < out1OnTimeSetHours) {
if ((tm.Hour) >= out1OnTimeSetHours && (tm.Minute) >= out1OnTimeSetMinutes) {
out1TimeControl = 1;
}
}
}

im looking for idea to turn off please

thanks

Thank you for publishing the example using a RTC.
I just have bought a RTC module and connected it as you show in the schematics.
The layout is the same as the model you have showed in the schematics.
I have put no battery in the module for now. It is continuously connected and the power is up.
I am using a Nano using the same connections (A4 and A5) as the Uno.
Then I copied today the raw code (written by John Boxall from http://tronixstuff.com) as the sketch from your page.
I changed the line “setDS3231time(30,42,16,5,13,10,16);” for the initial time (16:32:00 at Wednesday 4th of October 2023) as
sec=0, minutes=32, hours=16, day (Monday)=2, date=9, month October=10, year=23
as follows: setDS3231time(0,32,16,2,9,10,23);
Then I uploaded this sketch and opened the Serial Monitor and saw this as result:

23:10:09 1/1/0 Day of week: Sunday
23:10:10 1/1/0 Day of week: Sunday
23:10:11 1/1/0 Day of week: Sunday
23:10:12 1/1/0 Day of week: Sunday
23:10:13 1/1/0 Day of week: Sunday

The year is used as hours etc, it looks as all is in reverse order. Always 1/1/0 Day of week:Sunday

I have also used your I2C scanner, downloaded from your page about the OLED display SSD1306 to determine the Address of this RTC
with this output in the Serial Monitor:

Scanning…
I2C device found at address 0x57
I2C device found at address 0x5F
I2C device found at address 0x68
done

I believe it is address 0x68.
In your I2C sketch I have looked but can not find where the other two addresses are coming from.

Retain the time in the Real Time Clock
If you don’t want to reset the time every time the RTC is turned off, you should do the following:

after setting up the time, you should comment the function that sets the time and upload the code again.
comment-the-code

This is a very important step to set up the time in your RTC. If you don’t do this, everytime your RTC resets, it will display the time that you’ve set up previously and not the current time.

Can u Add this for Temperature on DS3231on your exemple ?? Maybe this help.

//——————————————————————————————-
// Routine pour Lire la Température dans le DS3231
// Par: Luc Verville
// Mars 21
// Rev :1.0
//————————————————————————————————

void showTemperature() {
uint8_t lsb;
int8_t msb;
Wire.beginTransmission(DS3231_I2C_ADDRESS);
Wire.write(0x11); //Temperature registers (11h-12h) get updated automatically every 64s
// Wire._I2C_WRITE(DS3231_TEMPERATUREREG);
Wire.endTransmission();

Wire.requestFrom(DS3231_I2C_ADDRESS, 2);
msb = Wire.read(); // msb = bcdToDec(Wire.read());
lsb = Wire.read(); // lsb = bcdToDec(Wire.read());

// Serial.print(“Temperature : “); Serial.print ((float)msb + (lsb >> 6) * 0.25f ); Serial.print(” C “);
// Serial.print (( 1.8 * ((float)msb + (lsb >> 6) * 0.25f) + 32)); Serial.println(” F”);

}

Good question, so our rtc will update despite DST changes.