[SOLVED] Using A Variable To Obtain An Item State

[RolfV (Rolf Vermeer)]

Yes this is possible, please take a look at this very educative Design pattern of @rlkoshak:

Design Pattern: Working with Groups in Rules

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 [image] 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 …

Based on this, I use something like this myself:

val name = triggeringItem.name.split("_").get(0)
val setpoint = AllThermostatSetpoints.members.findFirst[ t | t.name == name + "_SetpointHeat" ] as NumberItem
val temp = AllThermostats.members.findFirst[ t | t.name == name + "_CurrentTemperature" ] as NumberItem
val mode = AllThermostatModes.members.findFirst[ t | t.name == name + "_ThermostatMode"] as NumberItem

So for example I have a rule which is triggered when Member of AllThermostatSetpoints changed or Member of AllThermostats changed, and all items in these groups have a name like Thermostat1_SetpointHeat or Thermostat_CurrentTemperature, respectively.
So the first line gets the base name, so “Thermostat1” in this example. Then setpoint finds the item Thermostat1_SetpointHeat, so that holds that item, and so on.
Subsequently you can use setpoint.state to get the value of the setpoint item, mode.sendCommand to set the value of the Thermostat1_ThermostatMode item, and so on.

Essential in this approach is that all _SetpointHeat items are in the same AllThermostatSetpoints group, and so on.

EDIT: @vzorglub beat me to it, with another nice approach, which might also be more efficient in this case.