Home Assistant Smart Locks: What Is the Difference Between Unlock and Open?

If Home Assistant shows both Unlock and Open for a smart lock, treat them as different commands. Unlock releases the deadbolt so the lock is no longer secured. Open is a separate, optional action that unlatches supported hardware so the door can be pushed open without turning the handle. It does not mean that every smart lock can swing the door open, and the Home Assistant entity may not expose lock.open at all.

For a Lockin Veno Solar Palm that is already paired as a Matter device, the practical rule is simple: start with Unlock for ordinary entry, and use Open only if your actual entity exposes the action and the installed hardware supports unlatching. Confirm the behavior with the door closed and a person nearby before using it in an automation.

Unlock versus open in Home Assistant

Home Assistant’s lock integration separates the two actions because they can describe different mechanical outcomes:

Home Assistant also distinguishes the unlocked and open states. An unlocked lock can still have its latch engaged. An open lock, when supported, has released its latch. A jammed state means the lock tried to move but could not complete the operation—for example, because the bolt is misaligned or blocked.

The important detail is that lock.open is optional. A lock entity can support lock.unlock without supporting lock.open. Do not add an Open action to an automation simply because the word appears in a general Home Assistant guide.

What this means for the Lockin Veno Solar Palm

Lockin lists Veno Solar Palm as a palm-vein smart deadbolt with built-in Wi-Fi, Matter over Thread support, app control, PIN, mechanical-key, and voice-assistant access. Its product page also notes that smart-home features and automations can vary by platform and that the Lockin Smart App remains the place for full setup, settings, and management.

That establishes the model’s Matter connection; it does not establish that every Home Assistant installation exposes a separate unlatch command for this lock. Home Assistant receives the capabilities presented by the Matter device and its integration. Firmware, controller behavior, and the installed deadbolt or latch arrangement can affect what appears in the entity.

So the safe model-specific answer is:

• Use Unlock when you want the Veno Solar Palm to retract its locking bolt.
• Use Open only when the Veno Solar Palm entity visibly offers an open/unlatch action and you have confirmed what it does on your door.
• Do not describe either command as physically swinging the door open. A motorized door operator or a person still has to move the door unless separate hardware provides that function.

How to check which command your entity supports

Do this test with the door closed, the area clear, and a mechanical key or another approved entry method available.

1. Open the Veno Solar Palm device page in Home Assistant and select the lock entity.
2. Check the available controls or actions. Look for Unlock and, if present, Open. If Open is not offered, assume this entity supports unlocking only.
3. Run Unlock once. Watch the deadbolt and the entity state. Confirm that the bolt retracts and that the door remains physically closed if the latch or handle still holds it.
4. If Open is available, test it with a person at the door. Confirm whether the latch releases and whether the door still needs a push or pull.
5. Lock the door again and repeat the test once. If the motor sounds strained, the state becomes jammed, or the bolt does not move smoothly, stop and inspect alignment rather than repeating the command.

This test is more useful than assuming that the words mean the same thing across brands. It also gives you a real answer for your firmware, Matter controller, and door hardware combination.

Choosing the right Home Assistant automation

For most arrival and access automations, target Unlock. It represents the normal smart-deadbolt task and is the action to use when you want an authorized person to enter and then operate the door normally.

Use Open only for a specific, verified use case—for example, an automation that should release a supported latch before someone pushes the door. Add a short delay or a confirmation step if another device or person must move the door. Never build a safety-critical assumption around an action you have not tested.

For a simple unlock automation, select the Veno Solar Palm lock entity as the target and choose the Home Assistant Unlock action. If you prefer YAML, the action is conceptually:

actions:
  - action: lock.unlock
    target:
      entity_id: lock.front_door

Replace the example entity ID with your own. Do not substitute lock.open unless it is available in your entity’s action list and its behavior has been confirmed.

You can also use the state distinction in an automation. For example, a reminder can check whether the lock is unlocked. A workflow that depends on an actually released latch should check for open only if the entity supports that state. If the lock reports a jammed state, pause the workflow and inspect the door instead of repeatedly sending commands.

Matter and Home Assistant checks before testing

If the Veno Solar Palm is not responding, first separate a command-semantics question from a connectivity problem. Lockin’s product page identifies Matter over Thread support and lists compatible smart-home platforms, while Home Assistant’s Matter documentation explains that Thread devices need a Thread border router and that the Matter device must be commissioned to Home Assistant.

Before you troubleshoot the Unlock or Open behavior, verify:

• The Veno Solar Palm is actually present in Home Assistant as the Matter device you intend to control.
• Home Assistant’s Matter integration is installed and its Matter Server is running.
• A Thread-based installation has a working Thread border router; a Wi-Fi-based Matter path has the required local network reachability.
• The device is not unavailable, unknown, or jammed.
• The lock responds through an approved local control path before you build an automation.

If the lock is paired but unreachable, inspect the Matter device details, network type, IPv6 addresses, local routing, and mDNS/multicast conditions. A network failure can make a valid command look ineffective; it does not turn Unlock into Open.

Limits and a reliable fallback

Home Assistant’s generic lock documentation describes capabilities at the platform level, not a vendor certification for every Lockin model and firmware combination. The Veno Solar Palm product page likewise says that platform features and automations may vary. Keep the Lockin Smart App available for full device setup, settings, access management, and firmware-related work.

Keep a physical key and the lock’s emergency-power plan accessible. Veno Solar Palm has a concealed mechanical key cylinder and USB-C emergency power, while its solar-assisted battery still depends on usable conditions and battery state. Those backups matter if a controller, network, or battery issue prevents a smart-home command from completing.

Bottom line

Unlock retracts the deadbolt. Open is a separate, optional unlatch action for supported lock entities. For a functioning Lockin Veno Solar Palm Matter entity, inspect the actions Home Assistant actually exposes, test them with the door closed, and use Unlock as the default entry command. Choose Open only after you have verified that your entity and hardware support the behavior you need.

For model details and current conditions, see the Lockin Veno Solar Palm product page, the Lockin FAQ, and the Lockin user-manual library. For platform definitions, consult Home Assistant’s Lock integration and Matter integration.