Problem with Ds1307 and SQW pin to GND

Projects Networking, Protocols, and Devices
2

Hi @muhit114474

You connected the GND of the arduino to the GND of the module with the DS1307.

See this schematic from DS1307 RTC SMD Module - Electronics-Lab.com

RTC-DS1307-MODULE-SMD-SCHEMATIC
RTC-DS1307-MODULE-SMD-SCHEMATIC709×533 56.2 KB

or this:

RV mineirin

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