The Nuki Smart Lock Ultra is the flagship retrofit for euro-profile cylinders, with a brushless motor and stainless housing. Home Assistant controls it locally over Matter on Thread or Nuki's built-in MQTT client.
Setup guides
Roles it can fill
For the minority of US doors with euro-profile mortise locks. It ships with the Nuki Universal Cylinder; standard US deadbolt doors should use the Smart Lock (Deadbolt) instead. Matter over Thread gives Home Assistant local lock, unlock, unlatch, and battery; Nuki's MQTT client (over Wi-Fi or Thread, with a local broker and MQTT discovery) adds door-sensor state, last lock action, and keypad events. No cloud account required.
Entities in Home Assistant
Typical 9 entities via Matter
This model has no device dump in Home Assistant's test suite, so the list below is what a Matter Door Lock exposes at minimum. Optional features the manufacturer implements add entities on top.
Primary entities 1 What automations and dashboards use.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Lock (main) | lock | — | — |
Configuration 6 Settings exposed as entities, tunable from Home Assistant.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Auto-relock time | number | — | s |
| User code temporary disable time | number | — | s |
| Wrong code limit | number | — | — |
| Operating mode | select | — | — |
| Sound volume | select | — | — |
| Privacy mode button | switch | — | — |
Diagnostics 2 Health and troubleshooting values, hidden from dashboards by default.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Actuator | binary_sensor | — | — |
| Battery | binary_sensor | battery | — |
Derived from Home Assistant 2026.8.3: the entities every reference implementation of a Matter Door Lock produced in core's own tests. A floor, not the full list for this model.
Where to buy
Recipes using this device
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