Xenophon
October 13, 2020, 11:42am
1
Hi folks,
I am new to OpenHab and I wonder if it is possible to access the thing and its location an item belongs to in a rule?
Regards
While a thing can be called in a rule, you typically call the items; as items are linked to the thing.
It may be helpful you can provide more detail on what you are trying to accomplish.
Xenophon
October 13, 2020, 12:41pm
3
When my item (a contact of a window handle) changes its state I want to figure out the location of the window handle (thing) to send a command to other items (with the same location). An example of these other items is the mode of a thermostat.
rossko57
October 13, 2020, 1:13pm
4
This is what Groups can be used for.
Group Front_Room can contain two windows, a door, a thermostat, and three lights.
Figuring out which member you want to command is more the challenge …
Please see Design Pattern: What is a Design Pattern and How Do I Use Them for how to read and use DPs.
Problem Statement
Often one finds a number of Rules that are very similar and that all work on similar Items resulting in a lot of duplicated code. One way to solve this problem is through the use of Groups.
Concept
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This DP is not a standard DP in that it provides a single concrete template to follow to solve a specific problem. Instead this DP is more of a grand exploration of some …
Please see Design Pattern: What is a Design Pattern and How Do I Use Them for how to read and use DPs.
Problem Statement
Often one will have a number of separate Items which are all related to each other in some way. For example, one might have a Contact on a door and a DateTime to represent when the last time the door was opened. This is easy enough to keep track of if there are only one or two such Items, but if one has a lot of similar Items or is using a lot of generically coded rules where…
Xenophon
October 13, 2020, 1:46pm
5
I know the pattern, but I don’t want to write a rule for every room. Therefore I use a group for all window contacts and want to determine the location of the thing from the triggeringItem.
rossko57
October 13, 2020, 1:52pm
6
You can find out in a rule what Groups an Item is a member of.
