this post was submitted on 06 Jan 2025
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homeassistant

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Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io

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I've been using HA for a while; having my home just "do things" for me without asking is fantastic. My lights turn on to exactly the levels I want when I enter a room, my grass and my plants get watered automatically, heating and cooling happens only when it needs to. There are lots of benefits. Plus, it's just a fun hobby.

One thing I didn't expect, though, is all the interesting things you can learn when you have sensors monitoring different aspects of you home or the environment.

  • I can always tell when someone is playing games or streaming video (provided they're transcoding the video) from one of my servers. There's a very significant spike in temperature in my server room, not to mention the increased power draw.
  • I have mmWave sensors in an out-building that randomly trigger at night, even though there's nobody there. Mice, maybe?
  • Outdoor temperatures always go up when it's raining. It's always felt this way, but now it's confirmed.
  • My electrical system always drops in voltage around 8AM. Power usage in my house remains constant, so maybe more demand on the grid when people are getting ready for work?
  • I have a few different animals that like to visit my property. They set off my motion sensors, and my cameras catch them on video. Sometimes I give them names.
  • A single person is enough to raise the temperature in an enclosed room. Spikes in temperature and humidity correspond with motion sensors being triggered.
  • Watering a lawn takes a lot more water than you might expect. I didn't realize just how much until I saw exactly how many gallons I was using. Fortunately, I irrigate with stored rain water, but it would make me think twice about wasting city water to maintain a lawn.
  • Traditional tank-style water heaters waste a lot of heat. My utility closet with my water heater is always several degrees hotter than the surrounding space.

What have you discovered as a result of your home automation? While the things I mentioned might not be particular useful, they're definitely interesting, at least to me.

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[–] [email protected] 40 points 3 months ago* (last edited 3 months ago) (5 children)

While not publishing it, my weather station uploads my indoor temperatures to weather underground. The plaintext password is in every packet. It uses unencrypted HTTP.

My TV continues to chatter to random servers on the internet long after it has turned off. It transmits to a telemetry server on every single button press.

My air conditioners drain a lot more power when I haven't cleaned the filters. It's almost double.

A chromecast will try to bypass your router's DNS and go straight to Google's. It is constantly pulling data even if you're not using it. I'm fairly certain it's that slideshow. It's not cached at all.

[–] [email protected] 7 points 3 months ago* (last edited 3 months ago) (1 children)

@pHr34kY @corroded Not from home automation but from my #pihole installation.
My internet radio tries to send the title of each new song to itunes.apple.com. My smartphone tries to report any new installation / update of SW packages to googletagmanager.com.
Those are among the reasons I use a #pihole in the first place.

[–] [email protected] 1 points 3 months ago* (last edited 3 months ago) (2 children)

I just have BIND DNS, but I do capture all DNS traffic and re-route it through my own server. There's an adblock list on it.

I even set up DoT so my phone uses it for DNS when I'm out of the house.

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[–] [email protected] 24 points 3 months ago (2 children)

I've caught the front door and garage door left open several times (kids)

I found out my garage under my bedroom is primarily why my room is hard to heat and likely has poor insulation in the ceiling.

I found out my Samsung TV was sending a LOT of data home.

I know every time my Roomba gets stuck so I can go and locate it before the battery dies.

I know when my unraid Dockers fail to update and accidentally delete the old containers, so that I can go and re-add them.

One of my children were doing remote learning and I would get an alarm if he didn't get up in the morning and start using his Chromebook.

[–] [email protected] 12 points 3 months ago (1 children)

How much data is a lot? Mine lost wifi privileges for putting ads in my stuff, but I'm still curious.

[–] [email protected] 18 points 3 months ago (1 children)

It was burning a few gigs a day. Which wouldn't have been noticed except I wasn't using it to stream anything. I originally put it on the time out vlan, But my wife wanted to make changes to art mode, and of course that requires cloud connection. I should probably go back and isolate what it talks to and see if I can get art mode to continue working without letting it do whatever high bandwidth application it was trying to do before.

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[–] [email protected] 4 points 3 months ago (1 children)

Do you have some sort of notification for the docker fail one? I'm currently just periodically visiting the previous apps page in the Apps tab, but that's annoying and manual.

[–] [email protected] 1 points 3 months ago

Right now I'm using uptimekuma, It writes to a private telegram group I set up just for alarms.

I also have set up some user scripts that do curl calls to write to telegram on certain system conditions, like when I add a file to IPFS.

[–] [email protected] 3 points 3 months ago (2 children)

Outdoor temperatures always go up when it's raining.

Are you saying the outside weather temperature rises when it starts to rain, or am I understanding that incorrectly?

[–] [email protected] 8 points 3 months ago

Depending on the location, but

  1. Often rain comes along for the ride on a warm front as it moves over the property (although cold fronts also carry rain)
  2. In winter, the rainclouds act as insulation and so rainy days are warmer than blue-sky days
[–] [email protected] 4 points 3 months ago (1 children)

It's probably rain clouds trapping heat from escaping into the atmosphere, and humid air equalizing the temp by sucking heat off of high heat capacity surfaces like rocks and cement, warming the air.

That's just my guess though. I have no relevant scientific expertise.

[–] [email protected] 4 points 3 months ago

Along a similar line, ground temp (~200mm deep) lags air temps by about 12 hours

[–] [email protected] 22 points 3 months ago (3 children)

I can see if someone is on the toilet and having a Nr.2 by checking the power draw of the Japanese style toilet. (I also have a presence detector). I do not monitor the first part intentionally, though.

I unintentionally catched some birds eating on camera and that led to us installing a designated bird cam - in a 3D printed bird house. The AI model for identification is still in the works though - there aren't any good European based ones available as open source so I still will need to work out my own.

I found out the kid is reading FAR more than thought and is using the PC far less than I thought. Sorry kiddo!

CO2 is going up far more than expected,yes. What I found more interesting, though, is the direct connection between the humidity and my sinus infections - I always get them if my room air gets to dry.

Cooking releases an ungodly amount of VOC and uses FAR more electric energy than I thought.

And: After two years of optimisation I can control the temperature in two very sun exposed rooms just by using the covers and a weather forecast extremely well. Means they are up to 4° colder in the summer than before and 10° warmer in winter. Sadly this does not apply to all rooms.

And last but not least: Heating is the only point where home automation really saves energy here.

[–] [email protected] 1 points 3 months ago (2 children)
[–] [email protected] 1 points 3 months ago (1 children)

Was going to suggest this - I've not used it myself but friends have and the model apparently does have fairly good results https://github.com/kahst/BirdNET-Analyzer

[–] [email protected] 3 points 3 months ago

You know what, I've just checked and birdNET app is the one I use in the field, I thought I was using something from eBird. BirdNET is great for UK birds, I use it all the time! I'm an ecologist doing bird-stuff

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[–] [email protected] 3 points 3 months ago (3 children)

Do you have induction hobs or traditional electric?

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[–] [email protected] 4 points 3 months ago (1 children)

I had a terrible run of sinus infections last year so I've been using a humidifier and been checking the humidity in the house daily this winter. What percent range do you find is ideal?

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[–] [email protected] 21 points 3 months ago (1 children)

My electrical system always drops in voltage around 8AM. Power usage in my house remains constant, so maybe more demand on the grid when people are getting ready for work?

If it turns into a problem I wonder if you report that to your power provider they can investigate it. I assume it isn't much of a drop though 240v to 210v ish drop.

We had a UPS that would report under voltage every winter at a remote radio tower. We sent the info to the power company and a few months later found the issue and we never got an alert again.

[–] [email protected] 5 points 3 months ago (1 children)

I assume it isn't much of a drop though 240v to 210v ish drop.

If you had that big of a drop, it would likely have already caused the local power grid to trip and turn off. That hardware is not designed to run at a very large frequency differential from normal, and while 30v might not sound like a lot, it's still enough to massively change the Hz of the AC.

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[–] [email protected] 3 points 3 months ago (4 children)

Wait, how do you make your smart bulbs turn off and on automatically when you enter/leave a room? I've been using them for years and I always have to manually trigger them with an app! And how are you measuring power usage?

[–] [email protected] 5 points 3 months ago (1 children)

You'll want to research "room presence" systems.

Here's one I've been looking at implementing for an example: https://espresense.com/

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[–] [email protected] 10 points 3 months ago* (last edited 3 months ago)
  1. Motion sensors. The mmWave are very sensitive but also expensive. Nice for rooms where you sit still or lie down for longer periods, such as an office or bed room. PIR sensors are the cheap ones, very useful for hallways, stairs, kitchen and toilets.
  2. Some smart plugs measure current. Innr has a nice zigbee smart plug with a physical button and monitoring for around €20.

FYI If you have a Zigbee bridge, you can just connect most zigbee devices to it and you are not tied to the app or devices of the bridge's brand.

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