# Sentera RTK Base Station

## Base Station Disconnected

When using the Sentera Base Station utility in the app, ensure the following:

* You must have an ethernet adapter for your Apple mobile device.
* You must have the base station powered on and connected.
* You must have the ethernet settings [configured](/fieldagent-mobile-ios/60-second-guides/sentera-rtk-calibration.md#first-time-setup) correctly.
* When prompted, you must allow Local Network access.

You can check Local Network permissions under iOS Settings -> FieldAgent.

<figure><img src="/files/xSR0IObqlZvwT2LZoPc4" alt=""><figcaption><p>Local Network must be toggled on.</p></figcaption></figure>


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