Find the Nucleus on your network

To find your Nucleus, install the free Roon app on a Mac or Windows PC (available here). You can also use a phone or tablet, with the app from the App Store or Play Store. When you open the app, it automatically finds your Nucleus on your home network.

Your Nucleus should appear on the Connect to your Roon Server screen. If you don't see it, click Configure Roon OS devices.

Option 1: Use Roon

Once Roon finds your Nucleus, click Connect next to it. From here, you can:

• Log in or start a free trial: if you're new to Roon or want to start from scratch, please continue with Getting Started with Roon.
• Migrate from an existing Roon installation: to keep your playlists, play history, and settings from another Roon Server, click Restore a backup. For details, please see the Nucleus Migration Guide.

Option 2: Load the Nucleus Web Administration Interface

1. In Roon, go to Settings > Setup.
2. Next to Find Roon OS, click Find. A window appears listing all RoonOS devices on your network.
3. Click your Nucleus's IP address. The Nucleus Web Administration Interface opens in your web browser.

On Nucleus One and Nucleus Titan with RoonOS 3.0, the Web Administration Interface opens on the Overview tab.

On Nucleus and Nucleus+ (Rev A and Rev B), it opens the original single-page interface.

Troubleshooting

The Roon app isn't in the App Store or Play Store

• Wait a little: app stores roll out new versions by region, so the app may not be available in yours yet.
• Check the requirements: please make sure your Apple or Android device meets the minimum requirements.
• Check your device model: this is a very common issue, so please double-check the model number printed on the back of your device. Apple model numbers start with the letter A followed by four digits, for example A1203. You can identify iPhones here and iPads here.

Nucleus doesn't appear on the "Connect to your Roon Server" or "Configure Roon OS devices" screen

• Power: make sure your Nucleus is on. The white LED above the power button should be lit.
• Ethernet: make sure the Ethernet cable is plugged into your Nucleus, and the lights on the Ethernet port are on and blinking.
• Cable: make sure the Ethernet cable isn't damaged. If you can, please try a different cable.
• Same network: make sure the device running Roon is on the same network. Wi-Fi is fine, as long as it's on the same router as your Nucleus.
• Multiple subnets: automatic discovery doesn't work across multiple LANs or subnets. Please find your Nucleus's IP address in your router's list of connected devices. Then enter it in the Roon app using the Why can't I see my remote libraries? link.
• Web Administration Interface: if Roon still can't connect, please open the Web Administration Interface by entering your Nucleus's IP address in a web browser. On Nucleus One and Nucleus Titan with RoonOS 3.0, you can then click Test connection. You'll find it under Network Diagnostics on the Network & Access tab, and it checks every layer of the connection.

Nucleus fails to initialize

If you've installed an internal drive, RoonOS must format it before you can use it. Please see Formatting Nucleus Internal Storage.

Nucleus firmware

Before you use Roon with Nucleus for the first time, please make sure its firmware is up to date. For steps, please see How to Update Nucleus Firmware and Roon Server Software.

For more troubleshooting, please see Why can't Roon Remote Connect?

New to Nucleus? Please take a look at the Nucleus Manual.

Still can't connect to your Nucleus after these steps? Please get in touch with our Technical Support team here.