Ok the offset calculation is working fine. But I realized that the timezone is obviously wrong? Next start says 10:32, Garage Door Item says 10:30 - but it´s +1h ahead! It should be 09:30 instead.
The timezon is setup correctly in the regional settings for openhab. Any idea how to fix this? I tried offset 3720 (so 1 hour + 2 minutes) which didn´t work at all.
I found this topic here: How to correctly format datetimeoffset in item? - #6 by rossko57
Guess I´m not the only one having this problem…
Short update: The offset is working correctly now - it says: 2024-03-29T06:58:00.000+0100
Next start in the Automower App says 29th of March, 07:00 AM. I will update this one here if the trigger is working as expected - I hope it does!
Thanks for your support!