Repurpose Old Laptops as Smart Home Hubs With Home Assistant

Turning an old laptop into a central smart home hub is an accessible project, thanks to Home Assistant. Although the platform is built on Linux, users do not need to wipe their existing operating system or become command-line experts to begin. A low-commitment entry point is running Home Assistant OS (HAOS) inside a virtual machine, which allows the laptop to keep its current Windows, macOS, or Linux installation intact.

While virtualization introduces some performance overhead, the hardware demands are modest. A machine with at least 2GB of RAM and two virtual CPUs should suffice. For those seeking free virtualization software, options include VirtualBox for Windows, macOS, and Linux, as well as VMware Workstation Pro for Windows and Linux, and VMware Fusion Pro for macOS. Home Assistant also supplies specific VM images and setup guidance for these platforms.

For users who wish to dedicate a machine permanently to home automation, installing HAOS directly is the cleaner alternative. This method replaces the laptop’s existing OS and eliminates virtualization overhead, making it ideal for older or less powerful hardware. Prospective installers should verify that their device meets Home Assistant’s x86-64 system requirements before proceeding.

Once configured, the laptop functions invisibly in the background. Management is handled remotely via a web browser on another device or through the official mobile app. To maintain this setup, users should adjust power settings to prevent the laptop from sleeping when the lid is closed, then place it near the router with the screen off. Those using a virtual machine must also ensure the host operating system’s sleep settings are adjusted accordingly.