# Quick Start

<br>

<figure><img src="https://rtk.geodnet.com/iframe/doc0912v2/images/gga_workflow.png" alt=""><figcaption></figcaption></figure>

1. **Sign in** to get a token
   * Make a POST request to `/rover/v1/user/login` with your credentials.
   * Receive a Bearer token and an optional list of rover session IDs.
2. **Connect WebSocket with Authorization**
   * All rovers: `wss://nmea.geodnet.com/rover/v1/subscribe/all`
   * Single rover: `wss://nmea.geodnet.com/rover/v1/subscribe/:id`
   * Include header `Authorization: Bearer <token>`
3. **Receive GGA data**
   * Messages are JSON with fields `code`, `msg` (optional), and `data`.
   * `data` is an array of objects: `{ id, data }` where `data` is NMEA 0183 GGA strings.
4. **Handle errors and reconnection**
   * If you get `code = 10005` (Invalid token), re-login and refresh the token.
   * Use exponential backoff for reconnects.
5. **Optional: Filter by a specific rover ID**
   * Choose one `id` from login response’s `data.rovers` or other sources and connect to the single-rover endpoint.


---

# 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://rtkdocs.geodnet.com/gga-service/quick-start.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.