Result; Trouble Shooting - DFRobot DS1307 Manual

mark = 0;
}
}

Result

Trouble shooting
Thank the guy to share this great way to update DS1307 clock through computer, in this way, you
could get the precise time.
Guide Link
Download
Download
More question and cool
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http://www.lucadentella.it/en/2013/11/27/rtcsetup/
library https://github.com/adafruit/RTClib
sketch & pc_software https://github.com/lucadentella/RTCSetup
idea,visit DFRobot Forum
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