How to subscribe to "Sunrise with negative offset" in an app?

[Jost]

Is there already something ready to use?
Or do I have to make the calculations myself and use runOnce (or similar)?

I know about subscribe location, 'sunrise', handler, but in my case when it's sunrise it's already to late...

[igor.lehotan]

There is an offset option in RM that can be negative as well.

[Jost]

Thanx, but I'm not talking about RM,
I'm looking for in app solutions (coding question)...

[thebearmay]

I don’t recall seeing a way to subscribe to an offset, so I’m pretty sure it’s something you’d have to code for.

[mikee385]

It’s not super straightforward, but ultimately the event you’re looking for is sunriseTime, like this:

subscribe(location, "sunriseTime", sunriseTimeHandler)

This will send an event with the time of the next sunrise. In your code, you take that time, calculate the offset, and set up a runOnce schedule for that time.

I highly recommend this page from the SmartThings API. I’ve always just stolen the code from this page, rather than trying to remember how to do it myself:

https://docs.smartthings.com/en/latest/smartapp-developers-guide/sunset-and-sunrise.html

[Jost]

@mikee385

sunriseTime

Thanx a lot!

Why are such facts not in the official Hubitat Developer Documentation?

[wayne.pirtle]

1. The HE team spends most of their time expanding the capabilities of the system.

2. They basically copied a LOT of the functionality of SmartThings Classic. If they spent enough time (resources) to fully develop the documentation the platform would be lacking a lot of the functionality it has.

This is why those of us who do any coding use ST Classic documentation as a reference. It’s close enough.

[mikee385]

@Jost

Why are such facts not in the official Hubitat Developer Documentation?

I’m a bit embarrassed to admit it, but I didn’t even look at the Hubitat documentation before I answered your question. I started with SmartThings, so I usually go to their documentation out of habit. As @wayne.pirtle mentioned, the functionality is almost identical. I don’t think I’ve ever found anything in the SmartThings documentation that’s missing in Hubitat.