How to Set Up a Separate Wi-Fi Network for Smart Devices

Setting up a separate Wi-Fi network for smart devices means creating a second SSID (or guest network) on your existing router. You then connect bulbs, plugs, speakers and cameras to that network instead of your main one. This isolates smart gadgets from your laptops and phones, reducing security risk and network congestion without needing extra hardware in most homes.

Why Bother Splitting Your Network at All

Most Australian routers supplied by internet providers, or bought from retailers like JB Hi-Fi, Officeworks or Bunnings, can broadcast more than one Wi-Fi network at once. Many households never touch this feature. But once you have five, ten or twenty smart devices connected, there are a couple of good reasons to separate them from your main network.

The security angle

Smart plugs, bulbs and cheaper cameras don't always receive security updates as often as your phone or laptop. If one of these devices is compromised, keeping it on an isolated network limits what it can see or reach — it can't easily snoop on files shared between your computers, for instance. This matters more for cameras and video doorbells than for a smart bulb, but the principle applies across the board. Whether Australian consumer or privacy law treats a compromised smart device in any particular way isn't something we can state definitively here, so this is about reducing practical risk rather than meeting a legal requirement.

The performance angle

Smart home devices tend to "chatter" — sending small status updates constantly. On a busy household network with someone streaming 4K video and another person on a video call, that background traffic can occasionally contribute to slowdowns or dropped connections. Separating IoT traffic onto its own SSID (with its own address range) can reduce contention, particularly on older routers with limited processing power. If you're already dealing with devices falling offline, it's worth reading our guide on fixing smart home devices that keep dropping off Wi-Fi alongside this one, since network segmentation is often part of the fix.

Two Practical Ways to Create a Separate Network

There isn't one single "correct" method — it depends on your router and how technical you want to get.

Option 1: Use the built-in guest network feature

Almost every consumer router and mesh system sold in Australia has a guest network toggle in its app or web interface. That includes TP-Link, Netgear, Google Nest Wifi, and ISP-supplied units from Telstra, Optus and Aussie Broadband. Guest networks are designed to give visitors internet access without exposing your main network, but the same isolation works well for smart devices. Look for a setting sometimes called "Client Isolation" or "AP Isolation". When enabled, devices on that network can reach the internet but not each other. That's fine for many gadgets, but it can cause problems for anything designed to talk locally (more on that below).

Option 2: Create a second SSID or VLAN

Slightly more advanced routers and most mesh systems let you create an entirely separate SSID with its own subnet, rather than a temporary guest network. This is generally more flexible because you can turn off client isolation selectively. Devices on that network can then talk to each other (which most smart bulbs, plugs and hubs need) while still being kept away from your main devices. Some routers describe this as a "VLAN" or "IoT network" feature. If your router doesn't offer it, a mesh Wi-Fi system with dedicated IoT network support, or a router upgrade, may be worth considering. That's a bigger project than most people need to start with, though.

Step-by-Step: Setting Up Your Smart Home Network

1. Log into your router's app or web dashboard. This is usually at an address like 192.168.1.1, or through the manufacturer's app.
2. Find the guest network or second SSID option. It's often under Wireless Settings or Network Settings.
3. Give it a distinct name, such as "HomeIoT" rather than something that identifies your address or household.
4. Set a strong password, ideally different from your main Wi-Fi password.
5. Decide on client isolation. Turn it off if you want devices to control each other locally (for example, a smart plug triggered by a motion sensor). Leave it on if you only need internet access and everything is controlled through a cloud app.
6. Reconnect your smart devices to the new network — this usually means resetting each device and running through its app's Wi-Fi setup again, entering the new SSID and password.
7. Test that voice control and automations still work, since these often route through cloud accounts rather than local network connections.

This is genuinely a weekend afternoon project rather than an all-day one, but budget extra time if you have many devices to re-pair, since each one typically needs to be reset and reconnected individually.

Choosing Which Devices Belong on the Smart Home Network

Not every gadget needs shifting. As a rule of thumb, anything that connects directly to Wi-Fi (rather than through a hub) is a candidate.

Wi-Fi bulbs, plugs and speakers

A bulb like the Tapo L530B TP-Link Smart Wi-Fi Light Bulb connects straight to your home Wi-Fi without needing a separate hub. That makes it simple to move onto a dedicated IoT network, since you just reconnect it during setup. The trade-off with any Wi-Fi bulb versus a hub-based system like Zigbee is that it adds one more device talking directly to your router. That's exactly the kind of traffic a separate network is meant to absorb.

Similarly, the TP-Link Tapo P110 Smart Plug with Energy Monitoring connects via Wi-Fi and reports power use back through its app. It's a good candidate for the smart home network because it's typically controlled remotely or by schedule rather than needing constant fast local response, so keeping it on a separate SSID rarely causes noticeable issues.

Voice assistants and streaming devices need a bit more care

Smart speakers are a slightly different case. The Amazon Echo Dot Max Speaker is designed to manage other smart home devices through voice commands, which means it often needs to discover and communicate with gadgets on the same network. If you put your Echo on the main network and your bulbs on an IoT network with client isolation switched on, voice commands may fail to find those devices. Either keep isolation off for devices that need to interact, or place the speaker on the same segment as the devices it controls.

Common Problems After Splitting Your Network

Devices can't find each other anymore

This is the most frequent complaint after setting up a separate network. It almost always comes down to client isolation being switched on when devices actually need to discover each other locally. A common example is a motion sensor triggering a light directly, without going via the cloud. The fix is usually to disable isolation on your IoT SSID, or to make sure the controlling hub and the controlled devices sit on the same network segment.

Automations and routines stop triggering

If you've built routines following our guide to smart home automation for beginners, double check each device's connection after moving to a new SSID. A routine that used to fire instantly can start failing silently if one device is stranded on the wrong network.

Voice commands stop working properly

Say you've carefully named your smart devices for voice commands and everything suddenly stops responding after a network change. It's worth checking that your voice assistant and the devices it controls are on networks that can actually see each other.

Renters, Apartments and Shared Wi-Fi

If you're renting, you may be using a router supplied by your landlord, agent, or provided as part of an internet plan bundled into strata-managed building infrastructure. In share houses or apartments with a single shared router, adding a guest network is usually fine since it doesn't involve any fixed wiring or changes to the property. But check with a housemate or landlord before changing settings on shared equipment. Keep a note of the original settings in case you need to revert them. None of this typically requires an electrician, since it's software configuration on existing equipment rather than fixed wiring. But if you're ever adding new network hardware that requires running cabling through walls, that's a job for a licensed electrician or data cabler. It falls under AS/NZS wiring rules and isn't a DIY project.

You might be extending Wi-Fi or a mesh network to reach an outbuilding, garage, or granny flat. If so, our guide on building a Zigbee mesh that reaches the garage and granny flat covers some of the same distance and reliability challenges that come up with a dedicated IoT network too.

A Few Practical Tips

• Label your IoT network clearly in your router app so you remember which devices belong where.
• Keep a simple written list of which devices are on which network — useful when troubleshooting months later.
• Don't bother splitting a network if you only have two or three smart plugs and no cameras; the benefit is marginal until you have a reasonable number of devices.
• If you use a hub such as a SmartThings or Homey Bridge to manage Zigbee or Z-Wave devices, remember the hub itself still needs a Wi-Fi connection to your router. It should generally sit on whichever network your controlling app or voice assistant uses.

Sources

• Energy Safe Victoria: Electrical DDIY – Don't do it yourself
• Electrical Safety Office Queensland: Don't do your own electrical work
• NSW Government: Making changes to a rental property
• Consumer Affairs Victoria: Renters making changes to the property

Where to buy

Retailers stocking the products in this guide. Prices and stock change often, so check the retailer before you buy. We may earn a commission from these links at no extra cost to you.

• Tapo L530B TP-Link Smart Wi-Fi Light Bulb: Check price at Amazon AU · Check price at JB Hi-Fi · Check price at Harvey Norman
• TP-Link Tapo P110 Smart Plug with Energy Monitoring: Check price at Amazon AU · Check price at JB Hi-Fi · Check price at Harvey Norman
• Amazon Echo Dot Max Speaker: Check price at Amazon AU · Check price at JB Hi-Fi · Check price at The Good Guys
• Blaupunkt BPTV10 Android TV Streaming Device: Check price at JB Hi-Fi · Check price at BCF