# H-RTK with CubePilot Controller

The Standard H-RTK F9P GPS can be used with CubePilot controller by connecting to **GPS 2** port.\
\
If using Ardupilot with The Cube, set **`Serial3_Protocol` to -1** so that Ardupilot will read GPS2 port for GPS data if there is nothing connected on the GPS1 port.

{% hint style="info" %}
**Note:** GPS2 port on both Pixhawk & Cube does not support Safety Switch function. You can use an external safety switch or disable the safety switch on ground control station application.
{% endhint %}

<figure><img src="/files/FGPXwpDFQYuoN6dP547i" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/n57gNY3LxW1gKRTMeEcC" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.holybro.com/gps-and-rtk-system/f9p-h-rtk-series/standard-f9p-uart/h-rtk-with-cubepilot-controller.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.