[SOLVED] Switching when a condition is NOT met

[abasel (Andre)]

I have the following two switches in my sitemap

//All Home
Group:Switch:AND(ON,OFF)   gPresence            "gPresence"              <icon_presence>
//Someone is out
Group:Switch:AND(ON,OFF)    gPresenceIncomplete "gPresenceIncomplete"   <icon_presence>

I am trying to get the gPresenceIncomplete to show on when one of the group is off.

From a logic point of view I am trying to do the following

//Someone is out
Group:Switch:NOT(AND(ON,OFF))   gPresenceIncomplete            "gPresenceIncomplete"              <icon_presence>

From a syntax point of view I am not sure how to achieve this; basically I am wanting to invert the switch state (if that makes sense)

[5iver (Scott Rushworth)]

So, all of your presence Items are switches, they are all in the gPresenceIncomplete group, and you’d like this group’s state to be ON when any of the members are OFF and OFF when all are ON?

Group:Switch:NAND(ON,OFF)    gPresenceIncomplete "gPresenceIncomplete"   <icon_presence>

You’ll find a truth table for group logic in this post…

Area Triggers --> Area Actions

The main thing I am aiming to communicate in this tutorial is the concept of using the logic built into groups to lessen the complexity of rules. By setting up your Items and groups in the following way, you will be able to use one rule for much of the automation in your home. A second rule is needed if you’d like to have the lights adjust to Mode (Time of Day) and outside lux levels. The concept is that each area within a home has triggers and the combined state of those triggers can represent …

[abasel (Andre)]

NAND(ON,OFF)

Thanks for that and the tutorial link.