Hello @Community member and welcome to the community :)
The DS3231 is accessed through an I2C serial interface. For that, I advise you to get inspired from the I2C examples within STM32CubG0 MCU package:
STM32Cube_FW_G0_V1.5.0\Projects\NUCLEO-G070RB\Examples\I2C
You should check data and device address based on following DS1341/DS1342 datasheet.
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Imen
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Thanks
Imen
