Question on today's low

jhemak commented 4 weeks ago

Describe the issue

Hi @cloneofghosts, I am trying to find the simplest way to determine the lowest temperature of the next ~24 hours. I originally tried to use templow for the current day (day 0), however that does not work in cases where the current temperature (e.g. in the morning) is lower than the upcoming overnight low. Do I just need to create a template sensor to calculate the min value between the current temp and templow, or is there a built-in sensor value that would already provide this information? Thank in advance!

Home Assistant version

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Integration version

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Troubleshooting steps

[X] I have updated my Home Assistant installation to the latest version.
[X] I have updated the Pirate Weather Integration to the latest version.
[X] I have gone through the documentation before opening this issue.
[X] I have searched this repository and API Repository to see if the issue has already been reported.
[X] I have restarted my Home Assistant installation.
[X] I have queried the API in my browser to confirm the issue is not with the API.
[X] I have not included my API key anywhere in my issue.
[X] I have written an informative title.

cloneofghosts commented 3 weeks ago

I don't think there's anything built into the integration at the moment to get the lowest temperature for the next ~24hours so you might need to create a template but I'll ping @alexander0042 in case he has any ideas for this.

dxmnkd316 commented 3 weeks ago

Just adding this as a reference: https://github.com/Pirate-Weather/pirateweather/issues/5

jhemak commented 3 weeks ago

@cloneofghosts, thanks for confirming! I am going to use this as a template sensor:

{{ min(state_attr('sensor.pirateweather_daily_forecast', 'forecast')[0].templow | int(100), states('sensor.pirateweather_temperature') | int(100)) }}

cloneofghosts commented 3 weeks ago

I was able to find this resource on the HA forums of someone trying to do something similar. https://community.home-assistant.io/t/how-to-get-max-value-in-sensor-attribute-array/579236

It doesn't take the current temperature into consideration but still may be useful.

jhemak commented 3 weeks ago

Man, you are good. That is the more elegant approach I knew had to exist. Here's how I adapted it .. thoughts?

{{ state_attr('sensor.pirateweather_hourly_forecast','forecast')[:24] | map(attribute='temperature') | list | min }}

cloneofghosts commented 3 weeks ago

Yup, exactly like that. That'll get you the lowest temperature in the next 24 hours and you could probably combine it with the code you posted above to get the lowest temperature in the next 24 hours.

If you're able to get it working I'll add it to the FAQ section in the HA documentation page if you don't mind.

jhemak commented 3 weeks ago

Not sure I need to combine... do I? the last snippet gives the lowest temp in the next 24 hours based on the hourly forecast sensors alone. What would be missing? And of course, feel free to add to the documentation.

cloneofghosts commented 3 weeks ago

You'd only need to combine if you want to take into account the current temperature. If you're fine with the template as it is then we're good and you can mark this as complete.

jhemak commented 3 weeks ago

I did end up adjusting this. I don't know how all these weather sources come together in the API, but Just tonight I saw the current actual temperature several degrees lower than the lowest forecasted temperature of the 24 hourly forecast segments.

Here's the final version: {{ min(state_attr('sensor.pirateweather_hourly_forecast','forecast')[:24] | map(attribute='temperature') | list | min, states('sensor.pirateweather_temperature') | int(100)) }}

cloneofghosts commented 3 weeks ago

I did end up adjusting this. I don't know how all these weather sources come together in the API, but Just tonight I saw the current actual temperature several degrees lower than the lowest forecasted temperature of the 24 hourly forecast segments.

If you're in the US or parts of Canada the current temperature and the forecasted temperatures come from two different sources which is likely why you're seeing the disconnect between them.

alexander0042 commented 3 weeks ago

Thanks for reaching out! @cloneofghosts's solution here is perfect, and nicely builds on the existing HA tools! The discrepancy between current and the next 24 hours is a little strange though, so definitely let me know if it happens again

Pirate-Weather / pirate-weather-ha