How to connect a Bluetooth RTK GNSS receiver to a phone
With an external RTK GNSS receiver, the phone becomes the field interface. Accuracy depends on receiver setup, NTRIP, antenna height and checks.
Field takeaways
- Bluetooth pairing is only the first step.
- NTRIP, mountpoint, credentials and internet should be checked.
- Fixed status should be verified with a known point.
- Antenna height and method should be reported.
- MapLab Survey organizes RTK points, notes and exports.
Pairing
Switch the receiver on, pair it over Bluetooth in the phone settings, then select the external source inside the field app.
The check almost everyone skips
Confirm the position on screen is coming from the receiver and not the phone's internal GPS. If the reported accuracy is still in metres, something is not connected.
Before the first point
Enter the real antenna height and measure a known point. Two minutes of checking saves repeating a full day of work.
When the link drops
Bluetooth disconnects as distance grows or the battery fades. Watch the connection indicator, and stop recording critical points the moment the position falls back to the phone's own source: the difference between the two can be several metres.
Try these steps on your own phone.
MapLab Survey handles RTK/GNSS point capture, drawing, area and volume calculations and coordinate conversion, then exports to DXF, KML/KMZ, GeoJSON, Shapefile, GeoPackage, NCZ or CSV. Capture, calculation and export work offline. Live NTRIP corrections and online basemaps need a connection.
Frequently asked questions
Can RTK GNSS connect by Bluetooth?
With compatible receiver and app, yes.
Does NTRIP need internet?
Yes.
Is fixed status enough?
No, control checks are needed.
Can MapLab Survey use external receivers?
With suitable setup, yes.
Technical references
The field guidance in this article is aligned with the technical and official references below.
Related: iPhone Android RTK GNSS · RTK NTRIP drop · RTK GNSS field accuracy · MapLab Survey