"Member of" does not work in OH 2.1

[sihui]

@danielwalters86

As far as I know “Member of” trigger was only introduced in OH2.3

Features for Rules that work with Groups

Introduction This post provides an overview of two features that have been added to openHAB recently to make it easier to write rules that work with groups of items. These features only apply to rules defined in .rules files (also know as DSL Rules), and not any other types of rules/scripts such as those for the Experimental Rule Engine or JSR223 Scripting. The following sections will provide examples of the usage of each feature. These examples will be based on the items shown here. Group All…

Availability

“Member of” is an openHAB 2.3 feature. It is not available in any current release build. It is available in snapshot builds starting with openHAB 2.3.0 Build #1212.