Some router manufacturers (notably Netgear) have an extra option labeled “IoT network” that you can use. It may be possible to configure some routers to allow direct access to specific devices on a guest network from devices on your main network, but this varies from manufacturer to manufacturer. For some smart lights to respond to commands when the internet goes down, the lights and controllers must be on the same network. Remember that printers, network-attached storage, and smart TVs or speakers you want to be able to cast to should all be on the same network as devices like your computer or smartphone to work properly. You can connect it to a guest network, then connect it to the voice assistant platform of your choice (like Google Assistant or Alexa), and then it should have no trouble working wherever you are. This LG smart window AC, for example, needs to connect to the 2.4-GHz band in case a user wants to control it remotely when away from home. In practice, most smart home devices and their controllers are connected to the cloud and communicate through the internet anyway.
The potential drawback is that your devices cannot communicate directly through your local network (though they can still connect through the internet). Thankfully, there are three main ways to solve this issue.
This disconnect can lead to a frustrating loop where your new device hangs on the connecting step before eventually reporting that it cannot join your network. The problem? If you use your phone to set up the smart home device via its respective app, you might find that the device wants to join the 2.4-GHz Wi-Fi band, but your phone is on the 5-GHz band. The 2.4-GHz band has better range and penetration through obstacles like walls, but the 5-GHz band is faster. The router decides on the frequency band-choosing between 2.4 GHz or 5 GHz-based on the device and signal strength, which is called band steering. Simply put, most routers have a single network name or SSID (Service Set Identifier), which is what your devices connect to. There are a few possible reasons, but the most common is that many smart home devices can only connect to the 2.4-GHz Wi-Fi band. Whether you are welcoming a new robot vacuum into your home, setting up smart lighting, or adding one of the latest smart speakers, there’s a chance you may run into trouble getting your smart home devices connected to your Wi-Fi network.
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