Thank you all!

[rlkoshak (Rich Koshak)]

@Kees_van_Gelder

Though I am quite OK with C++ and a hoist of other languages, Java is not one of them, so I foresee a steep curve with the rules again, but learning is never bad.

Just to avoid confusion, Rules are not written in Java but a specially designed language we call around here the Rules Domain Specific Language (DSL). It is based on Xtend, it runs on the Java Runtime Environment, and it has access to Java classes and Objects, but it is very much unlike Java in all other respects.

If you are more comfortable with Python or JavaScript you might want to look into the JSR223 plugin. I find that those who come to OH Rules with a C/C++ background struggle mightily with the constraints of the Rules DSL.

@Kees_van_Gelder

Simulates my presence when I am away (to deter burglars, still have to find a good random function for my rules)

import java.util.Random

val rnd = new Random(now.millis) // I know, the timestamp is a really bad seed, but it is better than nothing and does it really matter how mathematically provably random these numbers are?

...

    // In a rule
    rnd.nextInt
    

https://docs.oracle.com/javase/7/docs/api/java/util/Random.html

Also, have you see things posting?

Presence Simulation

Hi Is there any alternative to GCAL to record how lights are changed and use it for presence simulation. /Mike

Read the whole thread, lots of good ideas there.

@Kees_van_Gelder

tells me when it is time to plant specific crop (carrots e.g. need the soil to be > 7 degrees C for planting, a ds18B20, an esp and a rule tell me)

I would love to see more specifics on this one. I’ve such a short growing season here that if I could base this on actual soil temp rather than just waiting until mid-May I might get an extra week of outdoors growing. If you are willing this would make an excellent new Thread in Examples and Tutorials.

Did you just bury the sensor in the ground? How deep? Did you include a moisture sensor as well? If I threw in a pH sensor I could maybe grow blueberries. Did you encounter any unexpected problems?

@Kees_van_Gelder

Controls my aquaponics systems

This is another one I’m sure a lot of people would love to know more about.