State engine as a subflow

General
1

Hi.
Is it possible to build a state engine as a subflow?
I want to be able to pass a numeric value (1-10) and based on that there is 3 different status variables that can change. 1 of the variables is dependant of the 2 other, so the subflow must be able to read it's own variables to set the correct output values.
I'm kinda new to node red, so please be gentle with me :slight_smile:

2

Yes it is possible, each instant of the subflow will have its own variables and should not interfere with the other instances.

3

thanks for the quick response. How would I access the variables from a subflow instance?
image
Here I have 2 instances of my subflow. can I add the instanse number as part of the address?
something like this:
var sts1 = flow.get("Pump01.OperationState")

4

You would set a subflow property in the template, then when you use a subflow you would give the property a value. This value can be accessed using env.get("property_name") in a function node.

5

Sorry for being a Noob here, but how do I set the subflow property value? i used the flow.set inside the subflow to hold the values, and expose these in the msg object. If I were to use the env.get() do I have to specify the name of the subflow instance as well?

6

THe docs will tell you setting subflow property

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7

Thanks for the links. I've been trying to do some research but had trouble finding relevant topics.
Thanks for all the help so far :smiley:

8

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