Trigger on rapid sensor value increase?

Configuration
1

I want to trigger an automation if a sensor value increases very fast, i.e. it goes from 20 to 60 within a few minutes. Is this possible?

2

You should define rapid first, let’s say change in value by 20 units in a minute.

  • create a number input helper, we will store previous value here
  • create a minute based automation
  • check if previous value minus new value is above threshold 20.
  • if yes, fire the actual event
  • update input helper with new value
3

Home Assistant has many useful utility integrations, this is one Trend - Home Assistant

3 Likes
4

Or just use the trend binary sensor with min_gradient: 0.22 calculated using (60-20)/(3*60), you may need to adjust this.

3 Likes
5

Just beat ya!

1 Like
6

I spent too long calculating the minimum gradient.

7

I spent too long staring at the utilities page trying to remember which one to use :slight_smile:

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8

Thank you guys, the Trend sensor is perfect.

9

One question left: I want to track for example if the sensor goes from 20 to 60 within 200s seconds. That is an inclination of 40/200=0.2

But I don’t want to track if the sensor goes from 20 to 22 within 10s. So besides an inclination of 0.2 units/second this should be the case for at least 100 seconds. How can I catch this?

10

Your initial post indicated this was for an automation.

You could try a for: 200 in the trigger.

1 Like
11

I kept circling back to the Filter integration, re-reading the Time Moving Averages Filter and thinking “Nah, that’s not it.” Couldn’t remember it was the Trend integration. Next time I’ll zero in on the Oddballs Utilities category.

12

I created a Derivative Sensor, which to me is a bit more straight forward.