I’m using openhabian on my RPI 0W that does not have any battery powered RTC and I would like to know where does openHAB get the time from?
My guess is probably somewhere from internet but what will happen when we are offline?
I have a few astro rules and I want to know how they may behave in worst cacase.
Here is a sample scenario:
- we are online and everything is fine
- a blackout comes - everything turns off
- power comes back on but we have no internet connection (with “outside world”, local is ok)
How will OH behave in terms of current date&time ? Because when the time is wrong astro rules will trigger in wrong point in time and that can be a problem
Will OH update its date&time automatically when the internet connection comes back?
Can I somehow simply check if I have a valid internet connection?