> For the complete documentation index, see [llms.txt](https://docs.premium-positioning.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.premium-positioning.com/guides/leica-zeno-flx100-gg04-plus.md).

# Leica Zeno FLX100 / GG04 plus

These steps connect a Leica Zeno FLX100 / GG04 plus to the Premium Positioning correction network over NTRIP, using Zeno Connect (+ Zeno Mobile / GIS app). They assume you already have your NTRIP credentials.

### Before you start

* Your NTRIP username and password, from your Premium Positioning welcome email or your account on the customer portal.
* Zeno Connect (+ Zeno Mobile / GIS app).
* A working internet connection on the controller or phone.
* A clear view of the sky at the point you are measuring.

### Network settings

These are the same for every Premium Positioning customer. Only your username and password are unique to you.

* Server or host: rtkpremium.xyz
* Port: 2101
* Mountpoint: COMMON
* Protocol: NTRIP

### Steps

1. Install Zeno Connect & your GIS app: On the Android device install Leica Zeno Connect from Google Play, plus your field app (Zeno Mobile or a GIS app like ArcGIS Field Maps). Zeno Connect is the bridge that talks to the antenna and feeds corrected positions to your GIS app. The device needs internet (Wi-Fi or SIM).
2. Power on and pair the antenna over Bluetooth: Switch on the FLX100 / GG04 plus and wait for the GPS light to flash. In Android Settings > Bluetooth, find your FLX100 (or GG04) and pair/connect. You only pair once.
3. Select the antenna in Zeno Connect: Open Zeno Connect, tap the antenna selector at the top (reads e.g. 'No antenna selected') and choose your FLX100 / GG04 plus. When linked, the Connectivity light flashes blue. Menu name varies by version.
4. Open Realtime Corrections settings: Go to Settings > Realtime Corrections (some versions 'GPS Correction Profiles'). Tap + (top-right) to create a new correction profile and name it e.g. 'Premium Positioning'.
5. Choose Internet / NTRIP as the profile type: Select Internet, tap Next, then enable 'Use NTRIP'. Labels ('Internet', 'Use NTRIP', 'Next') vary slightly by version; pick the internet/NTRIP option.
6. Add the caster server (host + port): Tap + to create a server entry: Host / Server / RTK URL = rtkpremium.xyz, Port = 2101, Protocol = NTRIP. Save it, select it, tap Next.
7. Enter YOUR NTRIP username and password: Type YOUR OWN NTRIP credentials from your welcome email - unique to your account; do not use anyone else's.
8. Select the COMMON mountpoint: With the server selected, open the mountpoint list (tap the list icon to fetch mountpoints - needs internet) or type it, and choose COMMON. Tap Next, then Finish.
9. Activate the correction profile: Make sure your new profile is the active one, and the Antenna is still set to your FLX100 / GG04 plus. Zeno Connect dials the caster; on the receiver the data ('10101') light flashes green once corrections stream.
10. Set Zeno Connect as the Android location provider: Leave Zeno Connect running in the background. For FLX100 / GG04 plus, select it as an external Bluetooth GNSS receiver inside your GIS app's location/GNSS settings (choose Leica as the make). (On older GG02/GG03/GG04 you instead enable Zeno Connect under Developer options > 'Select mock location app'.) Wording varies by Android/app.
11. Wait for the position to converge: In Zeno Connect's main screen accuracy/height/position values populate. Hold the antenna with clear sky and stay still a minute or two while it converges from autonomous/float toward fixed.
12. Confirm a fixed, centimetre solution: You're ready once it reports FIXED with \~1 - 2 cm horizontal accuracy. In Zeno Mobile the RTK icon shows 'Connected to RTK' and accuracy drops to \~1 cm. If it stays float, recheck internet, COMMON, credentials, and sky view.

### If the fix will not hold

Menu/button names differ between Zeno Connect versions and between Zeno Mobile and third-party GIS apps (e.g. ArcGIS Field Maps); where labels vary this guide is generic. A working mobile internet connection and clear sky are required to reach and hold a fixed RTK solution.

For more, see RTK corrections troubleshooting and Fix inconsistent RTK accuracy on site.

### Need help

Support is available 24/7. Include your receiver model, the mountpoint, the solution status, and the correction age when you get in touch.