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Smart-homes: The future, or harmful?
(beehaw.org)
What do you guys think of the idea of smart homes? I could make a basic setup using https://home-assistant.io to control my home temperature and lighting; the tools for doing this are everywhere nowadays and implementation doesn't seem too horrific anymore.
But setting aside what I "can" do, is this something that I "should" do? How can a person implement this without connecting any devices to the internet?
You can (mostly), but it involves more user input than the commonly advertised (google/alexa/etc.) integration.
You can choose sensors/actuators that run on protocols that don't touch the internet. Zigbee, Z-wave, rtl_433. The communication and data are local-only, from the device, to a transceiver on your automation host device. Home Assistant is a good place to start for the host, as others have said.
For some others that require networking of some kind, you can silo them. Put them on a VLAN with limited or no internet access, or just manually set the IP address without a valid gateway (not suitable for kit that is at all suspect).
For ones that must connect to some server owned by the company somewhere, the best bet is to just not buy them! Personally, I do everything I can to avoid kit like that. I absolutely loathe the idea of a device needing to phone home for basic functionality. It's just begging for the company to start charging, or even shut down the servers and leave you with a brick. Unfortunately, it means a lot of onus on researching kit before buying.
I have found luck with Ikea smart bulbs. They don’t need to be connected to the internet to operate.
Tp-link devices are notoriously bad about connecting to the internet. There is no way to operate them without an internet connection. On top of that, each device connects independently so even when you have a vLAN, there’s extra steps required each time a new device is set up.