"Is it safe to control SmartThings locks through Home Assistant?"

"Yes, when configured properly. Home Assistant controls locks locally — your lock commands never leave your home network. The risk isn't the software; it's the network security. A managed setup ensures your Home Assistant instance is properly secured with encrypted remote access."

"Can I give temporary access codes through Home Assistant?"

"Yes. Home Assistant can manage time-limited PIN codes for SmartThings locks. You can create codes that work only during certain hours, expire after a set date, or are single-use. A managed setup can automate this for recurring guests like house cleaners."

"What happens if Home Assistant goes down? Will I be locked out?"

"No. SmartThings smart locks always maintain physical key access and keypad functionality. Home Assistant adds automation and remote control on top — it doesn't replace the lock's built-in features. Your locks work independently even if Home Assistant is offline."

Popular Integration

SmartThings & Home Assistant

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Samsung SmartThings integrates with Home Assistant through the SmartThings cloud API, bringing SmartThings-connected devices (Zigbee, Z-Wave, Wi-Fi) into your Home Assistant dashboard. The integration syncs device states, supports control commands, and can trigger automations based on SmartThings device events.

This is a cloud-based integration — commands route through Samsung’s SmartThings cloud. SmartThings is often used as a bridge for its Zigbee/Z-Wave radio, giving Home Assistant access to devices that were originally set up through SmartThings without re-pairing them.

Paid SmartThings API from October 2026

Samsung is ending free SmartThings API access. Free access continues through Q3 2026, then starting October 2026 individual developers need a $4.99/month plan, with separate paid commercial tiers for business use. Because the Home Assistant integration depends on this API, ongoing access will require a subscription. Migrating devices to local control avoids these recurring costs entirely.

Cloud-based Requires internet connection

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HA Documentation

How SmartThings Works with Home Assistant

Getting SmartThings connected to Home Assistant and running reliably.

1

Secure pairing

Add SmartThings through the integrations panel. Smart locks pair securely and appear as lock entities with state reporting and control.

2

Access code management

Create, modify, and revoke PIN codes directly from Home Assistant. Set time-limited codes for guests, cleaners, or contractors.

3

Presence-based automation

Build automations that lock doors when everyone leaves and unlock when trusted family members arrive. Combine with cameras and lights for complete entry workflows.

Common SmartThings Issues

The problems installers run into with SmartThings and Home Assistant — and how a managed setup prevents them.

Paid API subscription required from October 2026

Samsung is ending free SmartThings API access. From October 2026, the API that powers this integration requires a paid plan: $4.99/month for individual developers, with separate commercial tiers for business use. Free access continues through Q3 2026, after which the integration stops working without a subscription.

Cloud latency on every command

Every command to a SmartThings device routes through Samsung's cloud servers, adding 1-3 seconds of latency. This is noticeable compared to local integrations and affects time-sensitive automations.

SmartThings API token expiration

The Personal Access Token used for the integration expires periodically. When it does, all SmartThings devices become unavailable until a new token is generated and configured.

Duplicate device management

Devices managed by both SmartThings and Home Assistant natively (like Zigbee devices that could connect directly) create duplicate entities and state synchronization conflicts.

Why installers choose managed SmartThings migration

Migration strategy to move devices off the SmartThings cloud API before the October 2026 paid requirement takes effect
Move devices from SmartThings cloud to local control, avoiding ongoing API subscription costs
Token refresh automation to prevent periodic authentication failures
Duplicate entity cleanup and unified device management
Gradual migration path that keeps clients operational during the transition

Learn How We Manage SmartThings