How to Connect Smart Devices to 2.4GHz Wi-Fi on a Dual-Band Router

Most smart home devices only support 2.4GHz Wi-Fi, not the 5GHz band. So if your dual-band router broadcasts a single combined network name, your phone may connect to 5GHz while the device can't see a signal at all. The fix is usually to temporarily split the bands into two separate network names, connect the device, then leave them split or recombine afterwards.

Why Most Smart Devices Insist on 2.4GHz

The 2.4GHz band travels further and pushes through brick, plasterboard and insulation better than 5GHz, which is faster but shorter-range. Smart plugs, sensors, cameras and doorbells are usually battery-sipping or low-cost devices, and the radios that work on 2.4GHz are cheaper and less power-hungry to build into a small gadget than dual-band chips. That's why the vast majority of mains-powered smart plugs, battery sensors, and budget-friendly cameras only ever ship with a 2.4GHz radio. Meanwhile, your phone, laptop and smart TV are probably running on 5GHz without you noticing.

This isn't a fault or a downgrade. It's a deliberate trade-off that keeps devices affordable and gives them better range around the house. That includes garages, laundries and granny flats, where Wi-Fi signal is often weaker to begin with.

Check Whether Your Router Is Already Splitting the Bands

Before changing anything, find out how your router is currently set up. Some Australian retail routers and ISP-supplied modems (common with Telstra, Optus and TPG connections) broadcast two separate network names out of the box. These look something like "Home_2.4" and "Home_5". Others merge both bands under one combined name, using a feature often called band steering or smart connect.

Signs Your Network Is Already Combined (Band Steering)

If you only ever see one Wi-Fi name in your phone's settings, your router is likely using band steering, which automatically shifts devices between bands based on signal strength and load. This is convenient for phones and laptops but is exactly what trips up single-band smart devices. The router may assign your phone to 5GHz during setup while the smart device can only ever see 2.4GHz. From the app's point of view, the network you're on and the network the device needs don't line up.

How to Tell Which Band a Device Is Actually On

Most router apps or web admin pages list connected devices along with the band each one is using. Look for your router's "connected devices" or "client list" page. If a device you know only supports 2.4GHz shows up under the 5GHz band, something is misreporting, or more likely the device actually connected to a different, separate 2.4GHz network you hadn't noticed. When in doubt, temporarily splitting the SSIDs removes the guesswork entirely.

Step-by-Step: Setting Up a Dedicated 2.4GHz Network

Logging Into Your Router

Find your router's IP address (commonly printed on a label on the unit, often something like 192.168.0.1 or 192.168.1.1) and enter it into a browser on a device connected to the same network. You'll need the admin username and password, which may still be the factory default printed on the router, or one you set when you first configured it.

Splitting the SSIDs

Once logged in, look for wireless or Wi-Fi settings. On most TP-Link and Netgear routers there's a toggle for "smart connect" or "band steering". Turning this off reveals separate settings for the 2.4GHz and 5GHz radios, each with its own network name and password. On ISP-supplied modems from Telstra or Optus, this option is sometimes buried under advanced settings or may need to be requested through their support if it's locked down. Give the 2.4GHz network a distinct name, for example adding "-2G" to the end, so you can always tell at a glance which band you're joining.

Naming the Networks So You Don't Mix Them Up

Clear naming matters more than it sounds. If you're setting up several smart devices and plan to use voice assistants, it's worth reading our guide on naming smart devices so voice commands actually work alongside this one. Confusing network names and confusing device names tend to cause the same kind of frustration during setup.

Connecting Devices to the 2.4GHz Network

With a clearly named 2.4GHz network in place, open the manufacturer's app and start the add-device process. When prompted to choose a Wi-Fi network, select the 2.4GHz one specifically rather than whatever your phone happens to be on. Many apps will warn you if you're on 5GHz and ask you to switch.

A plug like the TP-Link Tapo P110 Smart Plug with Energy Monitoring is a good example of how this typically plays out. During setup the plug creates its own temporary Wi-Fi hotspot, and your phone connects to that briefly. Then you hand it the 2.4GHz network credentials so it can join your home network properly. It's a straightforward process as long as you're deliberately selecting 2.4GHz rather than letting your phone default to whatever band it's currently on. Once connected, it lets you track power use and control the plug remotely through the app or voice assistant.

Doorbells and cameras follow a similar pattern but can be fussier about signal strength, since they're often mounted outside or near a front door where Wi-Fi might already be weaker. The eufy Video Doorbell E340 Dual Camera, for instance, needs a reasonably strong 2.4GHz signal at the mounting point to pair reliably and to keep its local recording working without constant dropouts. If your router is on the opposite side of the house from the front door, it's worth testing signal strength at the doorbell's exact location before committing to the install. No amount of band-splitting will fix a weak signal caused by distance or thick walls.

Smart speakers go through the same band-matching dance, just via a different app. Setting up something like the Amazon Echo Dot Max Speaker usually starts with a short Bluetooth handshake with your phone. After that, the Alexa app asks you to pick a Wi-Fi network for the speaker to join permanently. Again, this needs to be the 2.4GHz network if that's what the speaker supports, not whichever band your phone is currently connected to.

Your router or internet plan may involve anything beyond plugging in a standard router, like running new Ethernet cabling, adding powerline adapters through switchboards, or anything touching fixed household wiring. If so, that's a job for a licensed electrician rather than a DIY project. Australian wiring rules under AS/NZS standards generally apply to that kind of fixed work.

Sources

• Energy Safe Victoria: Electrical DDIY – Don't do it yourself
• Electrical Safety Office Queensland: Don't do your own electrical work

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.

• 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
• Aeotec Smart Home Hub (SmartThings): Check price at Amazon AU · Check price at eBay AU