I recently learned about Home Assistant here on Lemmy. It looks like a replacement for Google Home, etc. However, it requires an entire hardware installation. Proprietary products just use a simple app to manage and control devices, so can someone explain why a pretty robust dedicated device is necessary as a replacement? The base model has a quad core processor, 4 gigs of ram, and a 32 gig hard drive. Admittedly it’s no gaming PC, but it’s no arduino either.
What actually happens when I turn on a smart switch in my home? Does that command have to be sent to a server somewhere to be processed? What really has to be processed, and why can’t a smartphone app do it?
Edit: I am still getting new replies to this (which are appreciated!), but I wanted to share what I’ve learned from those who have posted already. I fundamentally misunderstood how smart switches work. I had very wrongly assumed that when my phone is connected to the WiFi, it sends a signal over the local network to toggle the switch, which is connected to the same network, and it turns on/off. While there are technologies that work like this (zigbee, kinda?), most smart home devices rely on a cloud server to communicate the signal. This enables features like using the switches from outside the home network, automation, voice controls, etc. The remote server is what’s being replaced.
You must log in or register to comment.
I think others have generally caught this, but I wanted to simplify the point: the apps on your phone are not controlling your home, a computer is. If you don’t use Google’s, then you’ll need to provide one.
That’s helpful. It seems like a system an insane person would come up with, but I understand it.
A dedicated server is needed because something needs to keep a catalog of the smart devices available on your network and ideally be accessible to many people in one household. You could make a system that went phone -> device but you would need to set up each device on each phone you wanted to use, which isn’t a great user experience. You could also run into issues where devices would need to handle multiple conflicting commands from different users coming in at once. Since smart devices are usually trying to use as little power as possible, that extra complexity would hurt you in that department. The third reason is that having a separate server enables automated workflows that would depend on an always online server that orchestrates multiple devices. For example, let’s say you have some automatic insulating blinds, a smart thermostat. You want to raise and lower the blinds to maximize your energy efficiency. Since you have the dedicated server, that server can check the temperature set point of your thermostat, current weather, and sunrise\sunset times. If it’s sunny out, and your set point is higher than the outdoor temperature, the server can raise the blinds to let warm sunlight in, and vice versa. If only your phone could control the devices a workflow like this couldn’t work when you were out of the house.
so can someone explain why a pretty robust dedicated device is necessary as a replacement?
The cloud is just someone else’s computer, so when you cut the cord from the cloud, you gotta run your own server.
And you don’t need to buy a (robust) device to run HA, just install it on a spare system and start playing with it. I started building mine about 1.5yrs ago when I bought a house and I think I only gave mine like 2 CPU and 8gb ram.
What actually happens when I turn on a smart switch in my home? Does that command have to be sent to a server somewhere to be processed?
Yes, you have to have something that accepts your commands and sends the action to the end device. Just like your Google home did.
What really has to be processed, and why can’t a smartphone app do it?
Because that’s not how things work. Your app has to talk to a server to send the commands, Google home has cloud servers and a local bridge. HA has an app that you can use to control your stuff, same as Google Home.
Smart Home apps are worthless without hardware required to connect the app to your home.
Proprietary products just use a simple app to manage and control devices
They have a dedicated set of servers your devices and app are connecting to, that’s what home assistant is essentially replacing.
It’s not just app > device, it’s app > server > device.
My homeassistant is running on a pi2 with 2GB RAM. it doesn’t need much.
But yes, it is a central place for processing and recording data, either from phone, imstalled electrical hardware or other devices.
The issue with the combination of rabbit holes I’m going down is all the damn pis Im gonna end up being lol
Get any old enterprise workstation (they practically give Dells away for free) and get to know Docker.
Using multiple Pis for single applications is a fool’s errand - my Optiplex was free and it is running ~30 containers with plenty of room to breathe.
But then I don’t get to justify my 3d printer purchase with custom enclosures with their jobs engraved on them
Don’t worry. There’s still plenty of ESP32 waiting to be flashed with ESPHome and placed into their own little enclosure out there.
Source: Me, who’s got a Bluetooth Proxy for my adjustable desk and some small LED strips running, with a soil moisture sensor planned as my next quick project.
You just need one Pi. get a pi5 for future proofing. Docker addition , so you can host more than just home assiatant
Depending. But yes. A lot of the time they go the long way around, and head out to some server and back to your local network.
If the internet is down, or the vendor shits off the server, the device stops working.
Home assistant is attempting to localise everything, and get different vendors devices to work together.
Note, for your hass install, it can be installed on any server. Though I am using the green device
vendor shits off the server
Lol
vendor shits off the server
Oh, autocorrect, sometimes you really say things better than intended
This is really amazing to me. I had no idea that it was using the internet to send the on/off signal from my phone, up to a server (multiple servers), just to send the command back to my home network, and to the device. That seems like an absolutely bonkers system to turn on a switch. I would be better off to repurpose an old RC toy to control the switch!
What is bad is when the supplying company goes out of business, you are left with junk. Self Hosting is the way.
Also if you buy Kasa TPlink plgus and switches there is a git HS100 repo that has scripts to run to preprogram your switches to use a localhost instead of baked in proprietary IP server, and scripts to associate your switches and plugs to your wifi without an app. https://github.com/jkbenaim/hs100
With this CLI tool you can also manipulate the plugs and switches direct by IP address rather than via homeassistant server.
A service needs a server, not just a phone. Do you want to self host, or use the entire hardware installation in someone’s cloud data center?
You can run HA on lighter hardware, or use a VM or docker, but it needs something to host.
When I say “hey Siri open my garage door”, my phone does voice recognition, calls the Apple Home app, which calls my local Home Assistant server, which calls the RATGDO which opens the door.
Plus the benefit of running HA on this hardware is that you can often eliminate the proprietary hubs and sometimes cloud-based communication.
It doesn’t take much to run home assistant. I just have a raspberry pi going and it never fails. I plan to upgrade it to something more powerful in the future, but for now it is more than capable of running home assistant for me with no issues.
Obligatory if you install HA on a raspberry Pi. Use the SSD option as you will wear out an SD card or usb key pretty quickly since those devices aren’t intended for constant writes from things like logging and generally don’t have any wear out leveling.
I ran all my home assistants on Pis with the SD card + external database and never had issues.
And I’ve had SDs fail within a month.
You might want to have some other storage than a cheap SD card though
Yes, Google runs their servers in the cloud. If you host it yourself, it runs off a device in your house.
But you don’t need to use their own hardware. You can run on whatever you like, and it probably doesn’t actually need all four vCPUs.
Even then, those requirements are easily satisfied by a Raspberry Pi and most other SBCs out there. Seems rather reasonable to dedicate one to HA. It’s not too crazy when you take into consideration how powerful cheapo hardware can be these days.
I actually run mine in a 12 year old castoff Thinkpad. 4 GB ram total. More than enough to run it because I run a DNS server, a dashboard and a speedtest server on the same machine.
My words.
When you read “Cloud” change the word in your head to “Someone else’s computer”
So when I was using Tuya lightbulbs I was connecting Tuya’s Computer to Googles Computer to turn my lights on.
Now I use Home Assistant, I’m connecting MY computer to Googles Computer to turn the lights on, since I’m asking Google to turn MY lights on.
I can just not use the Google Cloud and have a voice assistant in Home Assistant do it, then I’m just using my own computer.
Now then, you don’t think that all the photos you’ve ever taken reside in an app on your phone do you, because if you do I’ve got some news for you…
I don’t really understand why a computer is necessary at all, is the thing. I know that it’s possible to use wifi network to send a signal between two devices. I have a sound board that works this way, and manages to communicate precise multichannel instructions directly over the network without an internet connection.
If I want to turn on a light switch, it seems like all I should need to send is the location of the light switch on the network and the on/off command. I know that there is not the computing power in the light switch itself to process much more than that.
Do these devices all connect to a remote server to switch on and off??
Yes. That’s why it’s called the Internet of things. Every “smart”, wifi connected, device you have uses that connection to communicate with a remote server. The app on your phone does the same to control the light.
Check out Zigbee for an example local control.
Many “smart” devices are sold with the idea that you can control your home from somewhere else. Maybe change the temperature on your way home or get notified when someone rings your doorbell. All this stuff requires servers to work.
Controlling some lightbulbs via bluetooth/wifi would be possible of course, but probably not very interesting for many.
Pretty much, yes.
I think you’re underestimating the computing power of these devices. If it has WiFi, it has an operating system.
You’re looking for something like ESPhome maybe. It’s a project from the same people that do home assistant. There’s a web server (and/or local API) available that allows you to toggle outputs locally, your browser directly to the microcontroller.
From the wifi wikipedia page> Hardware>Embedded Systems
https://en.m.wikipedia.org/wiki/Wi-Fi
Increasingly in the last few years (particularly as of 2007), embedded Wi-Fi modules have become available that incorporate a real-time operating system and provide a simple means of wirelessly enabling any device that can communicate via a serial port. This allows the design of simple monitoring devices. An example is a portable ECG device monitoring a patient at home. This Wi-Fi-enabled device can communicate via the Internet.
https://github.com/jkbenaim/hs100 if you have tplink kasa hardware this cli tool lets you send direct commands via Wifi, no hub required. it is not that the tech actually needs a server, it is that the server handles IP address changes, records data, checks switch on/off status, scheduling, etc, to provide a better experience than hitting an on off command.
It’s crazy, given that all these devices have something powerful like an esp32, isn’t it?
I’ve done some of my home stuff this way, but I had to program it myself. Tasmota has some features which can be used without a server, but that’s just for simple stuff like switches. For whatever reason (simplicity for non tech people?), out of the box products don’t work this way.
If you don’t have days of spare time, you buy ready made products and set them up in minutes in Home Assistant
The computing as to when they need switching on and off is done by the computer.
I used to use Tasker and Smart Life connected through Google to control my lights. It worked but it was fucking shit. I wrote all the logic for it based off my phone, so it kinda worked for me, and everyone else in the house hated it.
Now it’s all controlled by a computer based in the home, based on sensors that are in the home from all kinds of manufacturers using different protocols (because that’s what Home Assistant does, conglomerate protocols) it works much better for everyone involved.
You can try to make iot devices work without a computer or cloud if you like but it will just be absolutely garbage.
Good luck
Except Google likes to collect that data
HA doesn’t require 4/4/32, that’s just the hardware the HA people sell. (which, given that your phone may be 8/16/128, is hardly “robust”). Generally, the Home Assistant crowd kind of target an audience that’s probably already running some kind of home server, NAS, or router, and HA can probably be installed on that device.
Theoretically, there’s no reason the HA server couldn’t be installed on your phone, except then your smart home functions would only work while your phone is in the house and not sleeping. Kind of defeats the point of a lot of it, unless you’re just thinking of smart home like “remote control for everything.” Regardless, much smaller niche for an already-small market, and apparently not a priority for the dev team.
Also, the point of HA is usually to avoid 3rd party servers, so you don’t just need something that runs HA, you need something that can receive data signals that may not be over wifi. Unless you can connect 3rd party receiver dongles to your phone, it’ll end up limiting which devices you can use on your network.
THIS.
Home Assistant is the brain of the operation. Your smart phone is just an arm or hand in the operation. It’s the same for any of the services you perceive to be just using your smart phone. They actually call out to servers owned by the various companies, and then return requested operations to your devices at home. So with Home Assistant you have the opportunity to use devices and a server that all remain in your own network. Your data and information aren’t being sent to a third party. This, of course, depends on the devices you buy.
But that’s the power behind Home Assistant.
I never understood the want or desire for such things honestly
Also you don’t want proprietary cloud based products because of things like this:
https://www.newsweek.com/amazon-smart-home-brandon-jackson-echo-racial-slur-allegation-1806947
In my case it was a specific use case in that I have a number of outdoor lights that I want to control without needing to go back in the house every time. Folks here have given a few options that would work well for this without relying on the internet, but I already have the setup installed at this point
Home Assistant can be installed as a Docker container instead of going with the whole dedicated machine route.
deleted by creator
Okay — can anyone — and I mean anyone, please explain to me that allure of the so called home assistant. Our home was built in 1965. Its housed many families very comfortably. It houses our family very comfortably. Our kids are heading off to college. Tra la la. We have holidays, happiness, and we contribute to the community at a variety of events. We sleep well. Eat well. We host parties of up to fifty people sometimes… we have a yard.We have a dog, two cats, fish etc. All the things that happen in a home.
We are happy.
We have no so called smart products. We use a terrestrial radio in the kitchen on the daily. We stream from the rip-off services when we desire. We are up on the shows etc. So we have internet — each of us has a phone and a device for working. I just don’t get it.
What is the allure of the so called smart home etc?
Can anyone, I mean anyone, please explain to me that allure of so called cats. We are happy and have no cats. I just don’t get it
I’m sure they have an app to help you understand.
It’s just a minor convenience, not sure why that’s confusing.
I can set the temperature from anywhere, that’s nice.
Imagine… setting it while at home.
For many, just a hobby. If it doesn’t strike you as something you need or want, then maybe it isn’t
That’s true. It doesn’t.
I like the idea that some folks have entirely private systems run by raspberry-pi. That sounds fun.
But what can it do more easily than an mid 20th century home can do?
But what can it do more easily than an mid 20th century home can do?
One word: Automations. Everything from lights to irrigation, HVAC to surveillance cameras, fishtanks to plant monitoring, managed by a single, extensible open source platform, hosted locally in your own home.
Of course that is not trivial. If you don’t see your smart home as a hobby you enjoy putting time and effort into then the smart home scene is not for you, especially not Home Assistant.
Sounds like you are in a fine place with your home, so you are probably not the target audience here.
Nope. Just like living. Not sure what all the hoo-haw’s about. Never felt so old in my life.
Who doesn’t like hand feeding the fish? Why even have them?
Also, notifications. I’m a fairly forgetful person, so I set up notifications to let me know if I left windows open or devices on before I go to bed or leave for work.
Sounds convenient.
Wifi smart devices can have that sort of completely local control, not just zigbee. LIFX devices use local control if you don’t connect them to the cloud. However, you’re then limited in lots of ways, such as you can’t then use a smart switch from a different manufacturer to control the lights. Home Assistant takes over the job of Google/Apple Home, which allows different manufacturer’s devices to all work together harmoniously. Those services also provide things like automations, turning the lights on when your smartphone arrives within a geofence for example. HA can do even better because those automations will work across Android as well as iOS. It also maintains the advantage of just one app to control your entire home.
As well, as far hardware, I think you’re misunderstanding a bit. Nabu Casa, the org that controls the open-source HA project, sells a couple of pre-built devices that run home assistant already. They’re designed as turn-key solutions for people with less technical know-how, and provide a bunch of expansibility so people don’t waste money needing to upgrade. The proceeds from those go back into supporting the projects costs. But you can go out and buy a Raspberry Pi Zero 2 W (512mb RAM) for $15 and it’ll happily run the kind of basic setup you’re after. But you will almost immediately run into it’s limitations if you try to do anything more complicated.
My HA server is running on an x86 VM with 2c/4t and 8gb of RAM to itself. Have a full music server running on it serving ~6 devices around the house though. Edit: 6 fixed devices. It can also be cast to a bunch of places from mobile devices. My music collection is in FLAC so it’s transcoding to lossy on the fly where needed.
