In this chapter I’ll introduce the architecture I chose, list some of the platforms I’ve used and describe how I integrated them together.
Decoupling
First, let’s talk about the decoupling of the controls and the controlled elements. I’ll use lights in this example but it applies to all types of devices.
Why it matters: The traditional way of controlling lights by connecting and disconnecting power is not well suited for smart homes.
Traditional wiring of lights with two switches in a room
- Lights are unreachable when off, this may be a problem for platforms like Philips Hue.
- Granularity is hard-wired during installation. You can’t control individual lights or change light grouping as your home evolves.
- Dimming is hard to do and controls for that would also have to be hard-wired.
There are ways to use traditional wiring in smart home setups, for example by using a smart switch that connects and disconnects power to the lights.
But the cleanest approach that gives the most flexibility and future-proofness to your setup is decoupling these two functions.
Decoupled wiring of lights
That means that your switches merely inform your controller when they are pressed. The lights are powered constantly and the controller instructs specific lights to turn on or off as needed.
Platforms
After a lot of research, I’ve settled on using these platforms:
- KNX wired standard I’m using for wall switches, sensors and actuators
- Z-Wave for sensors where KNX wasn’t an option
- DALI wired standard I’m using for controlling most indoor lights
- Philips Hue for lights where DALI wasn’t an option
- LinkTap for irrigation
- Wifi for closed platforms that don’t support anything else
- Home Assitant to bridge and control all of these platforms
- Node-RED to define the automation logic
Platforms and connectivity
In the next chapters, I’ll share my notes on these platforms and mention what worked and what didn’t.