Platform information: Hardware: raspberry pi3b+ OS: rasbian stretch Java Runtime Environment: openjdk openHAB version: 2 Right now I determine how many lights I have in a group with Group:Switch:OR(ON,OFF) group_house_switch_light it it possible to display as a groupname something like “[Gro…

Changed the two items: String NumberOfLightsON "[%s]" String NumberOfLightsOFF "[%s]"

You should be able to use Group:Number:COUNT("ON") group_house_switch_light "[%d] of 4 lights on" to get the number of items that is currently on. Note that you have to hard-code the total number of items, so if you add another light to the group you have to change that manually. Not sure if I go…

Okay so it is not possible to count the total number of lights by function???

In fact, the dynamic part of the label is not that flexible. Group:Switch:OR(ON,OFF) group_house_switch_light "Number of Lights on [%d]" would suffice to get the correct answer, but the total number of members can’t be displayed this way. You could build a rule like this: rule "count members" wh…

rule "count members" when member of group_house_switch_light changed then var Integer ctOff = group_house_switch_light.members.filter[m|m.state == OFF].size var Integer ctOn = group_house_switch_light.members.filter[m|m.state == ON].size // maybe var Int instead of var Integer? var I…

Ooops, sorry… Changed to upper case :wink:

Udo: do you remember if 2.3.0 Stable has this included? the post that I linked is from Feb/18 and OH2.3.0 Stable was released on May/18 so it should include this

As far as I remember Member of was introduced before 2.3.0 stable. It is possible to use when Item gGroup received update then instead, but this will always trigger gGroup.members.size + 1 times each time one member is updated.

next error ist 2018-11-30 08:14:36.990 [INFO ] [el.core.internal.ModelRepositoryImpl] - Validation issues found in configuration model 'default.rul$ The value of the local variable lOn is not used The value of the local variable lOff is not used because it is not set to the group how do I do this…

You will need to display that text that is built in the two variables. This is not an error. Just info from the rule parsing engine that the variables are not used. Create 2 new items: String NumberOfLightsON String NumberOfLightsOFF Change your rule: rule "count members" when Member of gro…

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[SOLVED] Group name function question

Setup, Configuration and Use Beginners

Dim (Angelos) November 30, 2018, 7:12am 6

small typo: Member of...

by the way: you need OH2.3.0 for this to work
see: Features for Rules that work with Groups