What Home Assistant Is and Why It Matters
Home Assistant is the world's most widely used open-source smart home platform. By 2026 it serves more than 1.2 million active users globally and supports over 3,000 integrations — from Philips Hue bulbs to Tuya sensors, EZVIZ cameras, and Aqara locks.
What sets it apart from apps like Mi Home or Tuya Smart is local processing. All automation logic and data stay on your hardware inside your home, no external cloud required, and no monthly subscription for advanced automation.
Hardware to Prepare Before Installation
For beginners, these are the recommended components.
A Raspberry Pi 5 with 8 GB RAM is the best current choice. It is two to three times faster than the Pi 4, includes hardware video decoding, and offers a PCIe slot for an NVMe SSD.
A 64 GB or larger MicroSD card works for starting out, though an M.2 2230 NVMe SSD is recommended for long-term reliability. You will also need an Ethernet cable and a USB-A adapter for a Zigbee dongle. The Home Assistant SkyConnect V2 dongle supports both Zigbee and Thread simultaneously.
A router supporting VLANs to isolate IoT traffic from your main network is an important security practice that any smart home in 2026 should adopt.
Installing Home Assistant OS Step by Step
Download Raspberry Pi Imager from raspberrypi.com, select the latest Home Assistant OS image for Pi 5, and write it directly to your MicroSD card or SSD.
Insert the card into the Pi 5, connect Ethernet and HDMI, then power on. The system boots and automatically downloads the latest update. Expect the first boot to take five to ten minutes depending on your internet speed.
Open a browser on any device on the same network and navigate to http://homeassistant.local:8123. The Setup Wizard guides you through creating your first user account and naming your home.
Connecting Tuya, Mi Home, and Aqara Devices
Once installed, go to Settings, then Devices and Integrations, then Add Integration. Search for Tuya, Xiaomi Miio, or Aqara and follow the authentication prompts.
For Tuya you must first create a developer account at the Tuya Developer Platform and link it with the Smart Life app. For Xiaomi Miio you will need each device's token, which can be extracted using a Python script or a dedicated Token Extractor app.
Once connected, all devices appear in the Home Assistant dashboard. Automation can be built visually or in YAML. The HappySmart team is available to configure automations and build a custom dashboard tailored to your household.