Best practice on handling two states

General
1

I have two states (person 1 home/away, person 2 home/away). I would like to create a function or something similar that can take the two states in concideration.

Something like:

if (person 1 = home or person 2 = home ) {
//do something
} else {
// do something else
}

I was thinking the join function might do the work but I do not know how to create the logic if this is the right choice.

Any help is appriciated

2

Have you considered the "switch" node ?

3

The swich node can only take one input right?, I have two inputs

4

Found a solution, using join node and then after using the switch node, creating 4 scenarios. Works fine, but maybe there is a smarter way?

5

If the 2 states or not stored in the message (payload) then

  1. I would store them in a flow context variable.
  2. Each time one of the 2 states should be updated, you update the respective flow context variable (e.g. in a change node) and then you route that to the switch node (that is doings the switch based on the values of the 2 context variables).
6

Not sure what you mean by that, you should be able to do it with a Join and two Switches, though I would probably use a Join and a Function.

7

There's two people each with two states so that gives 4 scenarios

8

There are four input scenarios but only two out.

9

Actually this can be done in one node using the OR gate from node-red-contrib-bool-gate. That node will do the Join and the OR test for you.

10

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