An Old Android Phone Can Double As a Smart Home Hub

A retired Android phone can take over the job of a dedicated smart home hub, so long as it stays powered on and connected to the home network, according to a project detailed by Android Authority. The outlet frames the setup as a way to reuse hardware that would otherwise sit in a drawer.

What problem does a phone-based hub solve?

Most smart home ecosystems need a device that is always on, always connected to Wi-Fi, and running an app or dashboard that can send commands to lights, locks, thermostats, and sensors. Dedicated hub hardware does this by design. A spare phone can do the same job if it is repurposed to stay plugged into power and left on a shelf rather than carried around, according to the Android Authority account.

What does a smart home hub actually do?

Functionally, a hub is a bridge. It holds the automation logic — "turn on the porch light at sunset," for example — and relays instructions to individual devices over Wi-Fi, Bluetooth, or a mesh protocol like Zigbee or Thread. The hub does not need to be powerful; it needs to be reliable and continuously available, which is why old phones with aging batteries can still qualify if they are kept tethered to a charger.

Why use an old phone instead of buying a dedicated hub?

The appeal, per the Android Authority project, is cost and reuse: a phone already owned by the household avoids the price of new hub hardware. It also keeps a functional device out of a landfill rather than replacing it outright with a single-purpose gadget.

What are the trade-offs of this approach?

Phones are not built for always-on hub duty. Batteries degrade faster under constant charging, and the screen and other components draw power the device does not need for a background hub role. Users who go this route generally need to disable aggressive battery-saving settings that would otherwise put the phone to sleep and interrupt its connection to smart home devices.

Does this work with Matter-based devices?

The broader smart home industry has moved toward a shared connectivity standard, Matter, intended to let devices from different brands work through a common hub regardless of manufacturer — a shift covered in Smart Home Central's reporting on a recent Matter update. Whether a repurposed Android phone can act as a full Matter controller depends on the specific app installed on it, a detail not specified in the Android Authority report. Households running a DIY hub alongside Matter-certified accessories may still benefit from organizing those devices with clear names, a practice outlined in Smart Home Central's guide to naming smart home devices for readable scenes, so automations built on a repurposed phone remain easy to audit.

Android Authority's full walkthrough, including the specific apps and settings used, is available at the original link above.

Artiglio is A coming-soon iPhone chief of staff for briefings and drafts. Not on the App Store yet.