this post was submitted on 22 Jun 2024
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Automating skylights with blinds to block direct sun (lemmy.world)
submitted 1 year ago by sytone@lemmy.world to c/homeassistant@lemmy.world
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Looking for a solution on how to determine when to close and open skylight blinds. I can just do hours of the day but would like it to be a bit more intelligent.

Anyone looked at using something like the math used for solar panels? I was thinking that when max solar power was generated in the summer that is when they are closed to keep heat out.

Ideas?

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[–] thr0w4w4y2@sh.itjust.works 2 points 1 year ago (1 children)

Hey, I have a Shelly window/door sensor on my bifold door. It includes a lux and temperature sensor, which i’m using to close the blinds (luxaflex/hunter douglas) if the temperature exceeds a certain level along with a high light level.

In practice where I live it is easier to close the blinds based on the current outside temperature, but the window/door sensor makes a good second check. it also prevents the blinds from operating if the door is open!

[–] peregus@lemmy.world 1 points 1 year ago (1 children)

Out of curiosity: how long does the battery last on those devices?

[–] thr0w4w4y2@sh.itjust.works 2 points 1 year ago (1 children)

I’ve had this one (it’s the Wifi version not Bluetooth) for about four months and it claims that the battery is at 81%. I’ve not owned it long enough to say if that is a linear or exponential (or totally made up) value.

[–] peregus@lemmy.world 1 points 1 year ago (1 children)

Wow, I thought that the WiFi version would consume way more. Thanks!

[–] thr0w4w4y2@sh.itjust.works 1 points 1 year ago

I expect it varies depending on how often you open the door, what firmware it’s on, whether it’s MQTT or something else etc etc.