What Devices Make Up a Smart Home?
A smart home can include sensors, lights, plugs, switches, blinds, locks, climate controls and other connected devices. A hub or smart home platform can help these devices communicate and work together through automations. You do not need every type of smart device: the right setup depends on your home, routines and what you actually want to automate.
This guide walks through the main device categories, what each one actually does and how they work together. If you haven't already, it's worth reading what a smart home is and how a smart home works first, since this article builds directly on those concepts.
What Devices Do You Need for a Smart Home?
There's no mandatory list of devices every smart home needs. A small setup might include nothing more than a sensor, a smart light and a single automation, while a more complete installation could combine lighting, blinds, climate control, security and several other systems. The best smart home devices are simply the ones that solve a useful problem in your home: not a checklist to work through.
Smart Home Sensors: How Your Home Detects What Is Happening
Sensors are a particularly important category because they allow a home to move from being controlled to being automated based on what's actually happening. For a closer look at this category, see our dedicated guide to smart home sensors.
Motion and Presence Sensors
These detect movement or presence in a space. For example, a hallway sensor could detect someone walking past after sunset and automatically turn on the light, without anyone reaching for a switch.
Door and Window Sensors
These detect whether a door or window is open or closed. Depending on the automation, this information could trigger an entry light, send a notification, or prevent climate control from running unnecessarily while a window is left open.
Temperature, Humidity and Light Sensors
These allow environmental conditions to be built into automations, rather than relying on fixed schedules. Examples include adjusting cooling as the temperature rises, closing blinds when sunlight becomes intense, or only turning lights on when a room is actually dark.
Smart Lights
Smart lighting typically allows lights to be turned on or off, dimmed, adjusted for colour temperature, scheduled, automated using sensors, or controlled in groups. For a closer look at this category, see our guide to smart lighting.
Smart Lighting Can Be Controlled or Automated
There's a useful distinction here: a connected light is one you turn on by opening an app. An automated light turns on because someone entered the room and the relevant conditions were met: no manual action required either way.
Smart Plugs
A smart plug allows the power supply to certain compatible devices to be controlled or automated, without needing to replace the device itself. Common examples include lamps, fans, some appliances and decorative lighting.
Smart Plugs Can Make Existing Devices Smarter
Not every appliance needs to be replaced with a "smart" version: a smart plug can often add basic control or automation to something you already own. That said, smart plugs should only be used with equipment and electrical loads they're rated for; using one outside its specifications can be unsafe.
Smart Switches
Smart switches integrate smart control directly into the light switch or another compatible control point, rather than into the bulb or device itself.
Smart Switches vs Smart Bulbs
| Smart bulb | Smart switch | |
|---|---|---|
| What it does | Makes the bulb itself smart | Makes the switch or control point smart |
| Installation | Often easy to add, no wiring changes | May require electrical installation |
| Best suited for | Lamps and individual lights | Permanent lighting circuits |
Any work involving fixed household wiring should be carried out by a licensed electrician, in line with NSW regulations. This article is a general overview, not installation guidance.
Smart Curtains and Blinds
Automated blinds or curtains can open in the morning, close at night, respond to sunlight, be controlled together, or form part of a larger routine.
Automating Blinds Based on Time or Conditions
A practical, Sydney-relevant example: west-facing blinds could close automatically during strong afternoon sun and reopen again later in the day, rather than needing to be adjusted manually each time the sun moves.
Smart Locks and Access Devices
This category includes smart locks, video doorbells, entry sensors and other access-related devices, at a general introductory level.
Smart Access Can Be Part of Larger Automations
Depending on the system and how it's configured, detecting a door opening: or a lock being used: could form part of a broader arrival or departure routine. Specific product choices and security considerations are worth their own dedicated discussion rather than general assumptions here.
Smart Climate Control
A smart home can incorporate air conditioning, thermostats, fans, heaters and temperature sensors to manage comfort more efficiently.
Climate Control Can Respond to Conditions
Instead of simply turning the air conditioner on at 5pm every day regardless of conditions, an automation could check the actual temperature first and only activate cooling when it's genuinely needed. This is a good example of the difference between a fixed schedule and a true condition-based automation.
Smart Home Hubs and Controllers
A smart home hub or controller can act as a central point where information from different devices is processed and automations are coordinated.
Does Every Smart Home Need a Hub?
Not necessarily. Some devices work directly through manufacturer apps or cloud services without a dedicated hub, while others rely on a hub, controller or central platform such as Home Assistant to coordinate more complex setups. Which approach makes sense depends on the number and variety of devices involved.
Voice Assistants and Smart Speakers
Voice assistants such as Alexa, Google Assistant or Siri can provide a way to control a smart home, but they don't necessarily constitute the smart home on their own.
Voice Control Is an Interface, Not the Automation Itself
Saying "turn on the kitchen lights" is smart control. Having those lights turn on automatically when someone enters the kitchen is automation. Neither is inherently better: they're different ways of interacting with the same underlying system and most smart homes end up using a mix of both.
Other Useful Smart Home Devices
A few additional categories are worth a brief mention, even without a dedicated section each: smart buttons, cameras and video doorbells, robot vacuums, smart irrigation, garage door controllers, energy monitoring devices, leak or water sensors and smoke or air-quality devices where appropriate for the property.
How Smart Home Devices Work Together
A device catalogue only tells half the story: the real value comes from how these pieces interact.
Sensors Provide Information
Something happens: for example, motion is detected in a hallway.
The Smart Home System Makes a Decision
The system checks relevant conditions, such as whether it's currently dark.
One or More Devices Respond
If the conditions are met, the hallway lights turn on. A broader example: when everyone leaves home, selected lights could turn off, climate settings could change and unnecessary devices could switch off: all from a single trigger.
Do Smart Home Devices Have to Be From the Same Brand?
Not necessarily, but compatibility matters. Technologies and platforms such as Matter, Zigbee, Thread and Home Assistant can help integrate devices from different manufacturers, depending on the specific products and how the system is set up. This is a deeper topic worth exploring separately rather than summarising in a single paragraph here.
Which Smart Home Devices Should You Start With?
Start with the problem you want to solve, not the device you want to buy.
Start With Everyday Friction
A few practical examples:
- "I always forget the hallway light." → a motion sensor paired with smart lighting.
- "The apartment gets very hot in the afternoon." → temperature or sunlight sensors paired with compatible blinds or climate control.
- "I have to turn off several things before bed." → smart devices combined into a single "Good Night" routine.
Add More Devices When They Have a Purpose
A smart home can grow progressively over time. There's no need to install everything at once: most useful setups start small and expand as new needs come up.
What Does a Basic Smart Home Setup Look Like?
As a general example, a basic setup might include 2: 3 smart lights, a motion sensor, a door sensor, a smart plug and a controller or platform to tie them together. This is only an example: a useful smart home might be considerably smaller or larger depending on the property and the person living in it.
How Hausie Chooses Smart Home Devices
Rather than starting from a list of products, Hausie starts with what the homeowner or renter wants the home to actually do, then selects compatible devices and automations to achieve it: needs first, technology second. This applies whether you're a homeowner or a renter looking to get started and it's consistent with how devices are chosen for every Hausie smart home installation.
For work that goes beyond low-voltage smart devices: such as permanent wiring for smart switches: see our guide on when you need an electrician for smart home installation in Australia.
Device Categories at a Glance
| Device category | What it does | Simple example |
|---|---|---|
| Sensors | Detect conditions or events | Detect motion in a hallway |
| Smart lights | Control or automate lighting | Turn on when someone enters |
| Smart plugs | Control power to compatible devices | Turn a lamp off automatically |
| Smart switches | Add smart control to compatible circuits | Control ceiling lights |
| Smart blinds/curtains | Automate window coverings | Close during strong afternoon sun |
| Smart locks | Manage compatible door access | Lock as part of a leaving routine |
| Climate control | Manage temperature and airflow | Cool the room when it gets too warm |
| Hub/controller | Coordinates devices and automations | Connect a sensor event to a light |
| Voice assistant | Provides a voice interface | "Turn off the living room lights" |
You do not need every category above to have a smart home: most households only need a handful of these working well together.
Frequently Asked Questions
What are the most common smart home devices? The most common categories are sensors, smart lights, smart plugs, smart switches, blinds or curtains, climate control and a hub or controller to coordinate them. Most smart homes only use a subset of these, chosen based on what the household actually wants to automate.
What smart home devices should I start with? It's usually best to start with whichever everyday task causes the most friction: commonly a motion sensor paired with lighting, or a smart plug for a frequently used lamp or appliance: rather than buying a wide range of devices at once.
Do I need a smart home hub? Not necessarily. Some devices work directly via manufacturer apps or cloud services, while others benefit from a hub or platform when the setup involves several device types working together.
Can smart devices from different brands work together? Often, yes. Standards such as Matter and Zigbee and platforms like Home Assistant, are designed to help different brands communicate, though compatibility can still vary by specific product.
Can renters use smart home devices? Yes. Many devices: such as smart bulbs, plugs, wireless sensors and some blind solutions: don't require permanent changes to a property, making them suitable for rentals as well as owned homes. See our guide on smart home options for renters for more detail.
Do I need an electrician to install smart home devices? It depends on the device. Plug-in and wireless devices generally don't require an electrician, but anything involving permanent wiring: such as smart switches or hardwired climate control: should be installed by a licensed electrician in line with NSW regulations.
---
Device compatibility, installation requirements and costs can vary depending on the specific products and property involved. For any work involving fixed electrical wiring, use a licensed electrician: this article does not constitute electrical or safety advice for a specific installation.