Some Astro-Binding Items are UNDEF

Add-ons Bindings
1

Hello,
I would like to use the Astro Dawn start time astroDawn#start of the Astro binding and have created a corresponding DateTime-Item via the main UI.

Unfortunately, this item is not filled with the correct time, but remains “UNDEF”.

Some other items also remain UNDEF, e.g., the items for night#start, morningNight#start.

Various other DateTime items are correct, such as noon#start, rise#start, set#start, civilDawn#start or nauticDawn#start. The three ...dusk#start’s are also correct.

And although astroDusk#start is correct, astroDusk#end is not correct (UNDEF).

I haven’t created the items for all channels, only for the relevant ones, so the image may be incomplete.

I use OpenHAB 4.3.5 in a Docker container on a Synology NAS.

Does anyone have any idea what the problem might be, or could this be a bug?

BR Ulf

2

Have you rebooted openHab?
The astro gets recalculated at midnight I think?
Anyway worth a try.

3

No, the last reboot or restart of the container was 5 days ago.

4

Ok. So the problem has been ongoing for a few days?
I thought you have just added the items.
Maybe clear the cache?

5

After stop the container, clear the cache and tmp folder and start the container
the problem still exist for the described items

2025-06-17 12:49:39.995 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunrise_StartTime' changed from NULL to 2025-06-17T05:12:00.000+0200
2025-06-17 12:49:40.000 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunset_StartTime' changed from NULL to 2025-06-17T21:43:00.000+0200
2025-06-17 12:49:40.001 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunset_EndTime' changed from NULL to 2025-06-17T21:48:00.000+0200
2025-06-17 12:49:40.055 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunnoon_StartTime' changed from NULL to 2025-06-17T13:30:00.000+0200
2025-06-17 12:49:40.055 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunnight_StartTime' changed from NULL to UNDEF
2025-06-17 12:49:40.055 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunmorningNight_StartTime' changed from NULL to UNDEF
2025-06-17 12:49:40.056 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunastroDawn_StartTime' changed from NULL to UNDEF
2025-06-17 12:49:40.061 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunnauticDawn_StartTime' changed from NULL to 2025-06-17T03:11:00.000+0200
2025-06-17 12:49:40.061 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSuncivilDawn_StartTime' changed from NULL to 2025-06-17T04:24:00.000+0200
2025-06-17 12:49:40.067 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunastroDusk_StartTime' changed from NULL to 2025-06-17T23:49:00.000+0200
2025-06-17 12:49:40.068 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunastroDusk_EndTime' changed from NULL to UNDEF
2025-06-17 12:49:40.068 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunnauticDusk_StartTime' changed from NULL to 2025-06-17T22:35:00.000+0200
2025-06-17 12:49:40.068 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSunnauticDusk_EndTime' changed from NULL to 2025-06-17T23:49:00.000+0200
2025-06-17 12:49:40.071 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSuncivilDusk_StartTime' changed from NULL to 2025-06-17T21:48:00.000+0200
2025-06-17 12:49:40.075 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSuncivilDusk_EndTime' changed from NULL to 2025-06-17T22:35:00.000+0200
2025-06-17 12:49:40.081 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSuneveningNight_StartTime' changed from NULL to UNDEF
2025-06-17 12:49:40.083 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'dtSundaylight_StartTime' changed from NULL to 2025-06-17T05:16:00.000+0200
6

Pay attention to the note at the bottom of the add-on docs.

Do not worry if for example the “astro dawn” is undefined at your location. The reason might be that you live in a northern country and it is summer, such that the sun is not 18 degrees below the horizon in the morning. For details see this Wikipedia article (opens new window). The “civil dawn” event might often be the better choice.

Are you perhaps in a location far enough from the equator where the sun isn’t going low enough this time of year?

7

Thanks, sometimes it’s important to read to the end.

My latitude is 51° North, so that must be the reason.
I’ll take a look at the elevation tonight.