Sunset, sunrise triggers at the wrong time since blackout

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1

Yesterday we had a power outage for half a day until about 2:30pm. Last night, long after everything was up and running again, the automation that is supposed to turn on some lights at sunset did not trigger, instead it triggered about 6 hours too late. Same for the sunrise trigger. Time based triggers work correctly. The map coordinates are correct. It is as if HA thinks it lives in a different location.

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Sunset is supposed to be about 6pm (18:00) not close to midnight.
(The “5 hours ago” and time is correct in this screenshot, I am an early riser :slightly_smiling_face:)

2

I just did a system reboot, then I wrote an automation to test the sunrise (using offset), and it worked as expected. Hm… I should have done the test before the restart. Anyway, I will report back tonight when the existing automation is supposed to be triggered.

3

Hi, do you use a RPi and/or did you check the time of your system?

4

I am using a Raspberry Pi Green, apparently without RTC, but the time is correct. It appears that existing time based automations are all late by just under 6 hours, only newly written automations work correctly. I just realised the blackout was for about the same length of time, just under 6 hours. Interesting!

5

In the meantime, the clock might have been synchronized but did you check it before?
Be aware that this could be an issue after a power failure.

6

Checking the clock was one of the first things I did and it has always been correct, since power came back.

7

Thanks for getting involved Nick.
Here is just a quick update. Meanwhile the issue is resolved. However something was definitely going on. Here is a quick summary.

  • Sunday 2:30PM power came back after 6 hours of blackout. Half an hour later internet was connected again
  • Sunday, sunset approx 6PM automation did not fire and lights stayed off.
  • Sunday around Midnight (6 hours too late), lights came on unexpectedly
  • Monday 7AM an automation that was scheduled for 1AM got triggered.
  • all of the reports and reported time were always correct
    **Next steps, chronologically listed **
  • I created a time-based test automation which was successful
  • I initiated a system reboot
  • I created further Sun based test automations which were all successful
  • at sunset, the lights turned on and scheduled automation triggered correctly at 1AM

I don’t know if the reboot fixed it or not, but for quite some time (18h+), time based automations were lagging by approximately the same amount of time as the blackout was long.

8

Good you got it solved!

I wonder if the clock from the RPi might have been synced at a certain point when your WAN connection came back online but HA needed that restart to correct it’s time settings…

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