Converting group items into non-group items

Setup, Configuration and Use Scripts & Rules
1

I have multiple group items which average out temperatures across all the sensors in every room like so:

Group:Number:AVG HKTKitchen_Average_Temp "Avg. temp [%.1f °C]" <temperature> (Kitchen, Smart_Thermostat, Sensors)

This works very well and lets me easily add items to the average when I put them in the room’s appropriate average temperature group (in this case, HKTKitchen_Average_Temp). These averages should also be stored in influxDB persistence (group Sensors* is in influxdb.persist).

Unfortunately, I can’t graph them with Graphana or the “chart” widget in HabPanel. Now, a bit of searching reveals that inability to graph group items is a known issue (in graphana at least) and one of the suggested solutions is to have the group item save it’s state into a non-group item every time it is updated.

Now, I could imagine the code for this would look something like this:

rule "do conversion"
when
   group_average_item changed
then
   non_group_average_item.postUpdate(group_average_item.state)
end

The problem is that I’m too lazy I’d rather not to write this 30+ times (I have a lot of zones) and even with copy/paste and find/replace, this strikes me as something that should be able to be efficiently handled. What would be the quickest and least effort way of doing this?

2

Almost the right answer. You can get the group state into the influxDB, but you must specify it in the Influxdb.persist file and without the *.

example:

Strategies {
	default = everyChange
}

Items {
Sensors* : 
HKTKitchen_Average_Temp :

}

Now it will persist the HKTKitchen_Average_Temp state and not the group-members, but as a group.

1 Like
3

Not necessary. Just put HKTKitchen_Average_Temp in your influxdb.persist file (no *). Then the state of the Group will be saved just like any other Item.

You never need to write identical Rules 30+ times. That’s what the Member of rule trigger, triggeringItem implicit variable and Design Pattern: Associated Items is for. You can handle all 30+ Items with one six or so line Rule (only one line of actual code).

rule "do conversion"
when
    Member of AverageGroups changed
then
    postUpdate(triggeringItem.name+"_PersistItem", triggeringItem.state.toString)
end
1 Like