Nuki Bridge Offline — How to Fix Connectivity

What Does This Error Mean?

A Nuki Bridge offline status means the bridge has lost connection to your Wi-Fi or to the Nuki cloud. Most cases are resolved by power-cycling the bridge and verifying Wi-Fi signal strength.

Affected Models

Nuki Bridge
Nuki Bridge 2.0
Nuki Smart Lock 3.0 Pro (built-in Wi-Fi)
Nuki Smart Lock 4.0 Pro (built-in Wi-Fi)

Common Causes

Bridge unplugged or power adapter loose
Wi-Fi signal too weak at the bridge location
Wi-Fi password changed and the bridge has stale credentials
Router rebooted and the bridge did not reconnect
Bridge firmware out of date

How to Fix It

Check the bridge LED.

Look at the LED on the bridge. A solid blue LED means connected. A red or off LED means disconnected. The exact pattern and meaning is in your manual.
Power-cycle the bridge.

Unplug the bridge from the wall socket for 30 seconds, then plug back in. Wait 2 minutes for it to fully reconnect. This resolves most transient offline issues.
Verify Wi-Fi signal at the bridge.

The bridge needs reasonable Wi-Fi signal at its socket location. If the bridge is far from your router, try moving it closer or adding a Wi-Fi extender between the router and the bridge.
Re-add the bridge after a Wi-Fi password change.

If you changed your Wi-Fi password, the bridge has stale credentials and cannot reconnect. Delete the bridge in the Nuki app and add it again, entering the new password during setup.
Update bridge firmware.

Open the Nuki app and check for bridge firmware updates. Older firmware can cause connectivity issues with modern routers.

When to Call a Professional

Most bridge offline issues are user-fixable. If a freshly set up bridge cannot connect at all, Nuki support can verify the bridge identity and replace it if faulty.