Rainfall data from online source (Met.no?)

Configuration
1

Hello!

I am trying to find a way to pull precipitation (rainfall specifically but overall precipitation would be fine) data from some online source for my approximate location. I can see in the Met.no weather integration that it has precipitation amounts but I have no idea how to access this information, or if it’s logged anywhere.

The goal is to use the past 24 hours rainfall to determine if a switch will activate the power to a solenoid valve for an automatic irrigation system. It seems like this should be simple to create the condition in the automation, essentially I just need a sensor for rainfall total over the past X hours, but I am lost with where to try to get this data into Home Assistant.

2

Hmmm…perhaps with AccuWeather integration and precipitation sensor using history somehow?

3

Anybody have any ideas for this, other than to get a rain meter?

4

I think this might work but I don’t know because we haven’t gotten any precipitation since setting up the relevant weather integration.

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5

I’m still working on this. For some reason, the history statistics card doesn’t work for the precipitation sensor, but a regular history card will. We got some precipitation yesterday and I can see that it’s working.

image

Now I’m trying to figure out how to make an automation that will only trigger on a schedule if the sum of the precipitation for the past 24 hours is less than 1".

Creating an automation to trigger on a schedule isn’t difficult, I just don’t know how to make the condition. This is what I’ve come up with so far:

condition: not
conditions:
  - condition: numeric_state
    above: '1'
    entity_id: sensor.1125_buttercup_precipitation
    attribute: unit_of_measurement

I haven’t tested it because that switch isn’t set up yet (and I suspect it’s not right).

So the trigger should, I think, only trigger when the numeric state of the precipitation sensor is not above 1, which I am hoping means 1".

6

Don’t do screenshots of your code. Copy and paste it into your message and mark it as preformatted text . It is much easier to help you this way.
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Anyway, drop the attribute: unit_of_measurement. That attribute only specifies the units, it has nothing to do with the value of the sensor.

You could also do below: 1 on the numeric state condition and drop the not condition.

1 Like
7

Edited to remove the picture.

Let me try below 1 and see if it’ll execute.

8

(probably) stupid question:

how do I specify the time that’s being measured? This is easy enough:

condition: numeric_state
entity_id: sensor.1125_buttercup_precipitation
below: '1'

This is the history of this sensor:

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I think it is always going to be below 1 unless we get an entire inch of precipitation at a time. Is there a way to sum the values for this over the past 24 hours?

9 
condition:
  - condition: numeric_state
    entity_id: sensor.1125_buttercup_precipitation
    above: '0'

  - condition: numeric_state
    entity_id: sensor.1125_buttercup_precipitation
    below: '1'