How This Guide Was WrittenThis is editorial research — not hands-on lab testing. We cross-reference manufacturer specifications, CSA/Matter certification databases, and recurring themes in Amazon verified reviews and owner forums. Product recommendations are current as of 2026 and include Amazon search links so you can verify pricing before buying. Focus areas for this guide: protocol standards (Matter, Thread, Zigbee), hub architecture, and ecosystem lock-in.

Before You Migrate: Inventory Checklist

Export mentally (or spreadsheet) before touching Home Assistant:

  • Every SmartThings device type (Zigbee, Z-Wave, Wi-Fi, cloud)
  • Active automations and scenes
  • Integrations that won’t migrate (proprietary cloud APIs)

Reality check: SmartThings local Zigbee/Z-Wave devices migrate well. Cloud-tethered devices (some brands) may need replacement.

5-Step Migration Path

Step 1 — Install Home Assistant Green

Ethernet in, browse to homeassistant.local:8123, create account. Do not add devices yet.

Step 2 — Enable Zigbee in HA

Plug included Zigbee dongle → Settings → Devices → Add Zigbee integration (ZHA). Leave SmartThings hub powered for now.

Step 3 — Pair one test device

Unpair a non-critical sensor from SmartThings (exclude in ST app), pair to ZHA. Confirm it reports in HA.

Step 4 — Rebuild automations

Recreate top 5 automations in HA UI (not YAML first). Test each with internet disconnected to verify local execution.

Step 5 — Decommission SmartThings hub

Only after all devices moved. Factory reset ST hub and remove from account.

Recommended Hardware for This Setup

These are specific products that match what this guide describes — not generic placeholders. Verify current pricing on Amazon before buying.

1. Home Assistant Green

Target platform hardware — HA OS pre-installed, Ethernet-first, Zigbee ready out of the box.

Check Current Price on Amazon (paid link)

2. Aqara Hub M3

Keeps existing Zigbee sensors online while you migrate automations into Home Assistant.

Check Current Price on Amazon (paid link)

HTR Takeaway

  • Start here: One-room pilot migration over a weekend — not a single-evening whole-house cutover.
  • Avoid: Migrating cloud-only Wi-Fi devices that never had local control — replace with Matter/Thread equivalents.
  • Bottom line: SmartThings → Home Assistant is straightforward for Zigbee/Z-Wave; painful for proprietary Wi-Fi brands.