So im building a project which relies on having an accurate time clock ticking away to trigger various things within my house all defined within a schedule.
This issue is when I sync the time clock via my serial I can get it 7 seconds behind my PCs time which im fine with but within 24 hours or so its about a minute in front! Iv re synced it many times and get fairly consistent results…
This is obviously a deal breaker for a schedule based system and is know where near what I expected to be able to get even with a “cheap” DS1307 from ebay!
Im using the <DS1307RTC.h> library which is linked to from the Arduino Library page so it should not be the issue?
Do you think I have a factory dud? Is there a chance my project code could be causing the time drift? I do not do any kind of RTC write commands, I set the time using a separate demo sketch then upload my real project seconds later.
Also my project is quite large at 51,58Bytes