Choose a good lock first, then add Home Assistant
Mechanical fit, door alignment, fire and egress requirements, manufacturer support, battery access and physical override come before integration. Home Assistant should add visibility and carefully selected actions without becoming the only way to enter or exit.
Use a model intended for the actual door and engage the relevant door or lock specialist for installation requirements.
Check the exact lock model and its supported features
Matter and native integrations can expose lock state, battery and control, but vendor-specific features such as fingerprint management may remain in the manufacturer app. The Works with Home Assistant directory records certified models and known limitations.
Confirm region, cylinder or mortise compatibility, required bridge or Thread border router and which credentials remain with the owner.
Be more adventurous with notifications than automatic unlocking
Useful automations include notifying that a door remains unlocked, turning on entry lighting after an authenticated unlock or pausing a routine when the door is open. Automatic unlocking demands a much higher confidence threshold.
Avoid presence-only unlock rules that can be triggered while the homeowner is merely nearby. Keep sensitive actions behind explicit authentication and test failure behaviour.
Keep administrator access and entry records under the homeowner’s control
The homeowner owns administrator access, recovery methods and the list of issued credentials. Installer access should be explicit, limited and removable. Record battery type, low-battery alerts and the emergency entry procedure.
Home Assistant history can support convenience and diagnosis, but it is not automatically a certified access-control audit trail or alarm system.
Primary references
Quick answers to common questions.
01Can Home Assistant unlock a smart lock?+
Supported integrations may expose unlock control, but Smarter treats it as a sensitive action and designs authentication, permissions and fallback carefully.
02Does Matter expose fingerprint management?+
Not necessarily. Certified-product notes show that biometric setup or calibration can remain in the vendor app even when lock control is available through Matter.
03Is presence detection safe for automatic unlocking?+
Presence alone is usually too ambiguous for an entry action. Prefer explicit authenticated control and conservative conditions.
04What happens when the battery is flat?+
The selected lock needs a documented manufacturer-supported emergency power or physical override path that the household understands.