this post was submitted on 01 Sep 2025
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Anyone automate anything with smart thermostats and outdoor temp? (lemmy.world)
submitted 22 hours ago by weastie@lemmy.world to c/selfhosted@lemmy.world
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I have a pretty simple smart thermostat without many fancy features. Every Spring and Fall I tell myself I should set up some kind of system where if the outdoor weather is good enough, maybe I dial back the heating / cooling, maybe send myself a text to open windows, etc.

Small example: I normally keep my house at 72 in the summer, but if it's up to 76 or so outside, it'd be nice if the thermostat turned off the cooling. I could manually turn it back on if I have guests over, etc.

I'm sure some of this logic would be easy to code myself, but wanted to check out what anyone else is doing first.

Using home assistant.

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[–] DaGeek247@fedia.io 2 points 16 hours ago

My goal was to never need to touch the settings for any of the HVAC units all year round,

I got a lot more luckier than you. I have a single floor, three bedroom place. All I needed to get my setup to an acceptable level was a programmable thermostat.

The other snag was more fundamental - I don't think it's possible to have a perfect temperature, even for one person. If I'm sitting still for long periods, I tend to want warmer temps. If I'm cleaning the house, I want cooler temps.

I set my temps for warmer in the afternoon, cooler in the evening/night, and semi-warm again in the morning. It's not perfect, but it makes getting to sleep and waking up a lot easier.