# Septentrio RxTools

RxTools is a desktop software suite from Septentrio for configuring and monitoring Septentrio GNSS receivers such as the mosaic-X5, mosaic-H, AsteRx-m3, and AsteRx SB series. The suite includes two key applications: **RxControl** for real-time receiver monitoring and configuration, and **DataLink** for serial and network data routing. To stream NTRIP corrections from RTKdata.com to a Septentrio receiver, you use DataLink as the NTRIP client to bridge correction data to the receiver. Alternatively, the receiver's built-in web interface offers a simpler path for users who prefer browser-based configuration.

**Download:** [Septentrio RxTools](https://www.septentrio.com/en/products/software/rxtools) (Windows, free)

## Requirements

* Septentrio GNSS receiver (mosaic-X5, mosaic-H, AsteRx series, etc.)
* Multi-band GNSS antenna with clear sky view
* USB or serial cable connecting the receiver to your Windows PC
* Windows PC with RxTools installed and internet access
* Active RTKdata.com account with username and password

{% hint style="info" %}
Don't have an RTKdata.com account yet? 👉 [Start 30-day Free Trial](https://rtkdata.com/try-rtk-corrections-free-for-30-days/) or [View Pricing](https://rtkdata.com/pricing/)
{% endhint %}

## Step-by-step setup (DataLink method)

{% stepper %}
{% step %}

#### Connect the receiver with RxControl

1. Connect your Septentrio receiver to the PC via USB or serial cable.
2. Launch **RxControl** from the RxTools suite.
3. Go to **File → New Connection** and select USB or the appropriate COM port.
4. Click **Connect**. RxControl will display receiver status, satellite tracking, and position data.
5. Verify that the receiver is tracking satellites and has at least a standalone position fix.
   {% endstep %}

{% step %}

#### Configure NMEA GGA output

Before setting up DataLink, ensure the receiver outputs GGA messages so the NTRIP caster can determine your approximate position.

1. In RxControl, go to **Navigation → Advanced Output Settings**.
2. Under **NMEA Output**, enable **GGA** on the connection port (USB1 or COM1) at a **1-second interval**.
3. Apply the settings.

{% hint style="warning" %}
**Why GGA matters:** RTKdata.com uses the `AUTO` mountpoint to generate a Virtual Reference Station based on your position. Without GGA output, the caster cannot determine your location and will not send appropriate corrections. This is the most common reason for NTRIP connections that appear active but produce no RTK improvement.
{% endhint %}
{% endstep %}

{% step %}

#### Launch DataLink and create connections

1. Launch **DataLink** from the RxTools suite (or from RxControl via **Tools → DataLink**).
2. You need to create two connections and bridge them:

**Connection 1 — Serial Port (to the receiver):**

1. Click **New Connection → Serial Port**.
2. Select the COM port or USB port connected to your Septentrio receiver.
3. Set the baud rate to **115200** (default for most Septentrio receivers).
4. Click **OK**.

**Connection 2 — NTRIP Client (to RTKdata.com):**

1. Click **New Connection → NTRIP Client**.
2. Fill in the connection fields:

* **Send NMEA GGA:** **Enabled**

{% tabs %}
{% tab title="North America" %}

* **Host (domain):** `rtk.rtkdata.com`
* **Host (IP fallback):** `13.56.117.10`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO` (recommended) — or `AUTO_WGS84`, `AUTO_ITRF2020`, `AUTO_ITRF2014`
  {% endtab %}

{% tab title="Europe" %}

* **Host (domain):** `eu.rtkdata.com`
* **Host (IP fallback):** `3.73.41.96`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO` (recommended) — or `AUTO_WGS84`, `AUTO_ITRF2020`, `AUTO_ITRF2014`
  {% endtab %}

{% tab title="Australia" %}

* **Host (domain):** `aus.rtkdata.com`
* **Host (IP fallback):** `54.206.56.130`
* **Port:** `2101`
* **Username / Password:** From *RTK Credentials* in the internal dashboard (not website login)
* **Mountpoint (ALL CAPS):** `AUTO` (recommended) — or `AUTO_WGS84`, `AUTO_ITRF2020`, `AUTO_ITRF2014`
  {% endtab %}
  {% endtabs %}
  {% endstep %}

{% step %}

#### Bridge the two connections

1. In DataLink, select both connections.
2. Click **Link** or drag one connection onto the other to create a bidirectional bridge.
3. The bridge routes GGA from the receiver to the NTRIP caster, and RTCM corrections from the caster to the receiver.
4. Data flow indicators should show bytes moving in both directions.
   {% endstep %}

{% step %}

#### Monitor RTK convergence in RxControl

1. Switch back to RxControl.
2. Open the **Position** window and the **PVT Status** panel.
3. Watch the solution type progress: **Standalone → DGPS → RTK Float → RTK FIX**.
4. Once **RTK FIX** appears, centimeter-level accuracy is achieved.

**How to verify RTK is working:**

* **PVT Mode** in RxControl shows **RTK Fixed** (solution type 4).
* **Horizontal accuracy** drops to **0.01–0.02 m**.
* **Correction age** stays below 5 seconds.
* DataLink shows active bidirectional data flow (byte counters incrementing).
* Satellite Tracking view shows differential corrections applied (satellites marked with "D").
  {% endstep %}
  {% endstepper %}

## Alternative: Web interface method

Septentrio receivers include a built-in web interface that can configure NTRIP directly, bypassing DataLink entirely.

1. Connect the receiver via USB and open a browser to `http://192.168.3.1` (default IP).
2. Navigate to **Communication → NTRIP Client**.
3. Enter the same RTKdata.com connection settings from the tabs above.
4. Enable the NTRIP client and monitor status from the web dashboard.

{% hint style="info" %}
The web interface method is simpler and recommended for field deployments where you do not want to run desktop software.
{% endhint %}

## Troubleshooting

| Problem                              | Cause                      | Fix                                                                           |
| ------------------------------------ | -------------------------- | ----------------------------------------------------------------------------- |
| DataLink NTRIP connection fails      | Wrong hostname or port     | Verify hostname; confirm port is `2101`                                       |
| Connected but no corrections applied | Bridge not configured      | Ensure serial and NTRIP connections are linked bidirectionally in DataLink    |
| Stuck on FLOAT                       | GGA not sent to caster     | Enable GGA output at 1 Hz on the receiver port; check DataLink GGA forwarding |
| "Mountpoint not found"               | Lowercase or wrong name    | Enter `AUTO` in ALL CAPS                                                      |
| COM port busy or unavailable         | Another app using the port | Close other serial tools; use separate ports for RxControl and DataLink       |
| Position jumps erratically           | Multipath interference     | Move antenna away from reflective surfaces; use a ground plane                |

## Tips for Septentrio RxTools

* **DataLink is a routing tool.** It passes data between caster and receiver without processing corrections.
* **RxControl diagnostics.** Use built-in sky plots, position scatter plots, and C/N0 views to diagnose signal quality.
* **Keep firmware current.** Septentrio firmware updates improve NTRIP handling and RTK convergence time.
* **Advanced mountpoints.** For specific reference frames, use `AUTO_ITRF2020` or `AUTO_ITRF2014` instead of `AUTO`.
* **Concurrent logging.** RxControl can log raw SBF data while receiving corrections for post-processing QC.