RTK Bluetooth Setup

The SiteView mobile app connects to Bluetooth Low Energy (BLE) RTK GNSS receivers for centimetre-level positioning. Pair your receiver, configure NTRIP correction data, and the app switches from phone GPS to high-accuracy RTK coordinates for all point capture and measurement work.

Supported Receivers

The SiteView mobile app works with RTK GNSS receivers that communicate over Bluetooth Low Energy (BLE) using the NMEA 0183 protocol. Most modern survey-grade and mapping-grade receivers support this standard, including popular models from manufacturers such as:

• Emlid (Reach RS2/RS3)
• Trimble (R series, Catalyst)
• Topcon
• Leica
• u-blox based receivers
• Bad Elf

ℹ️ Did you know?

The app reads NMEA sentences (GGA, RMC, GSA, GST) from the receiver over BLE. Any receiver that outputs standard NMEA over Bluetooth Low Energy should be compatible. If your receiver uses classic Bluetooth only, check whether it also supports BLE mode.

Scanning for Devices

1. Open Settings in the SiteView app or navigate to the Receiver screen
2. Ensure Bluetooth is enabled on your device and the RTK receiver is powered on and discoverable
3. Tap Scan to begin searching for nearby BLE devices

The app lists all discovered Bluetooth devices with their names, signal strength indicators, and connection status. Your RTK receiver should appear in the list within a few seconds.

💡 Tip

If your receiver does not appear, check that it is in pairing mode and within range (typically 10 metres for BLE). On Android, ensure you have granted the Nearby Devices permission to the app.

Connecting and Pairing

1. Tap your receiver's name in the discovered devices list
2. The app establishes a BLE connection and begins listening for NMEA data
3. A connection status indicator appears, showing the receiver state

The status indicator uses a chip or icon that reflects the current state:

Once connected, the app automatically parses incoming NMEA sentences and uses the receiver's position instead of the phone's built-in GPS.

NTRIP Configuration

To achieve centimetre-level accuracy, your RTK receiver needs correction data from a reference station network. The SiteView app includes a built-in NTRIP client that fetches corrections and forwards them to the receiver.

Setting Up NTRIP

Navigate to the NTRIP configuration screen and enter the following details:

ℹ️ Did you know?

NTRIP credentials are provided by your correction service provider. In Australia, Geoscience Australia operates a free NTRIP service. Your state survey authority may also operate correction networks. Contact your provider for connection details specific to your area.

QGPSnet Preset

For users in Queensland, Australia, the app includes a QGPSnet preset that pre-fills the NTRIP host, port, and common mountpoints for the Queensland GNSS network. Select the preset, choose the nearest mountpoint, enter your QGPSnet credentials, and you are ready to receive corrections.

This saves time and eliminates manual entry errors for the most common correction service used on Queensland construction sites.

Testing the Connection

After configuring NTRIP:

1. Tap Connect to start receiving corrections
2. The status indicator updates to show Receiving corrections
3. Watch the fix quality indicator — it should progress from Single to Float to Fixed as the receiver converges on a precise solution
4. When the fix quality shows Fixed, you have centimetre-level accuracy

Convergence time varies depending on your receiver, the correction source, and sky visibility. In good conditions, a fixed solution typically takes 30-90 seconds.

⚠️ Watch out!

If the fix quality stays on Single or Float for more than 5 minutes, check that your NTRIP credentials are correct, the mountpoint is appropriate for your location, and the receiver has a clear view of the sky. Dense tree cover, tall buildings, or being indoors will prevent a fixed solution.

Auto-Reconnect

If the Bluetooth connection drops — due to the receiver going out of range or a temporary signal interruption — the app attempts to reconnect automatically. The same applies to the NTRIP correction stream: if the connection to the caster is lost, the app retries in the background.

When auto-reconnect succeeds, the status indicator updates and position accuracy resumes without any manual intervention. This is particularly useful on construction sites where you may walk in and out of Bluetooth range as you move around the site.

What's Next?

• RTK Capture — capture high-accuracy points with your connected RTK receiver
• Point Capture — learn the general point capture workflow
• Settings — configure position source and other preferences