> 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/bad-elf-flex-flex-mini.md).

# Bad Elf Flex / Flex Mini

These steps connect a Bad Elf Flex / Flex Mini to the Premium Positioning correction network over NTRIP, using Bad Elf GNSS Master app (+ a 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.
* Bad Elf GNSS Master app (+ a 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. Power on the Flex: Hold the power button until the Bad Elf Flex / Flex Mini powers up. Give it a clear view of the sky and, for best accuracy, mount it on a survey pole \~1 m or more above the ground to reduce multipath.
2. Pair over Bluetooth in OS settings first: Before opening any app, pair at the OS level: Settings > Bluetooth, pair the device named like 'Bad Elf Flex \[serial]', wait for 'Connected'. Pairing in the OS first is the most common fix for connection problems on iOS and Android.
3. Open the Bad Elf app: Launch the Bad Elf controller app (e.g. Bad Elf / GNSS Master). Select your connected Flex from the device list. App name/icons vary by version.
4. Open the corrections / NTRIP section: In the receiver settings find the corrections area ('Correction Mode', 'Corrections', or 'RTK Corrections') and choose NTRIP / 'RTK via NTRIP' > Network. (In GNSS Master this is the 'Corrections' page with Mode = 'NTRIP Client'.) Labels differ slightly by version.
5. Create a new NTRIP profile: Tap '+' to add a new NTRIP profile and name it e.g. 'Premium Positioning'.
6. Enter the caster host and port: Host: rtkpremium.xyz Port: 2101 Protocol: NTRIP. Double-check the host spelling.
7. Enter the mount point: Set the Mount point to COMMON (capitals). If the app offers a fetch-source-table button you can confirm COMMON is listed, but typing it manually is fine.
8. Enter YOUR NTRIP username and password: Enter the NTRIP username/password from your welcome email - unique to you. Don't use your website/portal login, and don't share them. If you can't find them, contact support.
9. Enable Send GGA: Turn on 'Send GGA' / 'Send NMEA GGA to base station' - the network is VRS-style and needs your approximate position to start streaming. Leave NTRIP version at the default unless told otherwise.
10. Save and connect: Save (or Done) to store the profile, select it, and tap Connect. The app logs in and feeds corrections to the Flex automatically.
11. Confirm RTK Fixed: Watch the solution status move Autonomous → DGPS/Float → 'RTK Fix' (\~1 - 2 cm). Wait for 'RTK Fix' before recording points - 'Float' is not yet survey-grade.
12. Set the Flex as your GIS app's location source: iOS: the Flex feeds Location Services automatically once connected - just keep the Bad Elf app connected and your GIS app uses the device location. Android: enable the receiver as the mock/location provider (turn on 'Mock location' after selecting the Bad Elf app in Developer Options), or use a direct app link (e.g. SW Maps) if your GIS app supports it. Confirm the GIS app reports cm accuracy.

### If the fix will not hold

Always pair over Bluetooth in OS settings before opening the app. Menu/button names differ between Bad Elf app versions and iOS vs Android - match the closest label. Keep a clear sky view and pole-mount the antenna. If you stay on Float, recheck the host spelling, that Send GGA is on, the mount point is exactly COMMON, and your credentials.

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.