Events: State node only if output changes

Third party integrations Node-RED
1

In the Events: State node you can toggle it to ignore of the state hasn’t changed.

But I’m trying to figure out a way to ignore it if the result (true / false) has not changed. For instance, if I’m checking if a number value is above or below a threshold (luminance in a room for example). If the value changes but are still within the same threshold (output is still true or false), it’s still running.

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Is there any way to prevent this?

2

What you can do in this scenario is tell the event state to output either on/off depending on the value.

$number($entity().state) > 1000 ? "on" : "off"

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Now msg.payload will be either on/off, adding a filter node after the event state will only send when the message changes.

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1 Like
3

Use a trigger: state node with two conditions:

  1. Current State: <= X
  2. Previous State: > X

This setup will trigger the flow only when the entity state crosses below the threshold X from a higher value.

4

Thanks for your help! This seems to work just as I want. :slight_smile: