> 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/sparkfun-rtk.md).

# SparkFun RTK

These steps connect a SparkFun RTK (Facet / Express+ / Torch) to the Premium Positioning correction network over NTRIP, using Built-in NTRIP Client (WiFi web config) or SW Maps. 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.
* Built-in NTRIP Client (WiFi web config) or SW Maps.
* 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. Decide your correction path: SparkFun RTK units pull corrections two ways: (A) the receiver's own built-in NTRIP Client over its WiFi web config page; or (B) feed corrections from a phone app such as SW Maps over Bluetooth. Path A suits reliable on-site WiFi; Path B suits the field with a phone hotspot. Steps 2-6 cover Path A; steps 7-10 cover Path B.
2. Path A - Power on and enter Config (WiFi) mode: Turn the unit on. Reaching Config mode depends on the model: RTK Torch - double-tap the Power button within 1 second (two beeps); RTK EVK - click the Mode button to highlight 'Config', then double-click; RTK Express+/Facet - use the Setup/power button to step to 'Config' / 'WiFi Config' on the display. Wording varies by firmware. The unit then broadcasts a WiFi network named 'RTK Config'.
3. Path A - Open the web config page: On your phone or laptop, join the 'RTK Config' WiFi network the receiver broadcasts. Open a browser (Chrome works best) to rtk.local. If that doesn't load, use the config IP shown on the receiver's display.
4. Path A - Connect the receiver to your local WiFi: In the web config, open the WiFi section and enter your local WiFi SSID and password (this is the internet the receiver uses to reach our caster - not the caster login). You can add fallback networks.
5. Path A - Enable the NTRIP Client and enter caster settings: Find the NTRIP Client section (under corrections/GNSS configuration; tab name varies by firmware) and enable it. Enter Caster Host rtkpremium.xyz, Caster Port 2101, Mountpoint COMMON. Protocol is NTRIP. Match by meaning if labels differ: host/address, port, mount point.
6. Path A - Enter YOUR caster username and password: Enter the NTRIP username and password from your welcome email into Caster User and Caster User PW (sometimes user/account name and password) - unique to your account; do not use anyone else's. Save; the unit exits Config and starts connecting.
7. Path A - Confirm corrections are flowing: The receiver joins your WiFi, then the caster. On units with a display the WiFi icon stops blinking and the solution should reach RTK Fix within \~30 s under clear sky. If it keeps retrying, recheck the WiFi SSID/password and your caster credentials. Skip the SW Maps steps below.
8. Path B - Pair the receiver over Bluetooth: Power on and note the four-character code on the display (last four of its MAC). In your phone's Bluetooth settings, pair the device whose name matches, e.g. 'Facet Rover-XXXX' or 'Torch Rover-XXXX'.
9. Path B - Connect in SW Maps: Open SW Maps > New Project. Open the menu (top-left) > 'Bluetooth GNSS'. Pick your RTK unit (instrument model 'SparkFun RTK') and press 'Connect'. Confirm it's connected.
10. Path B - Configure the NTRIP Client in SW Maps: Open the menu > 'NTRIP Client'. Enter address rtkpremium.xyz, Port 2101, Mountpoint COMMON, and YOUR welcome-email username/password. Enable 'Send NMEA GGA' (the caster needs your approximate position), then Connect.
11. Confirm RTK Fix: Watch the receiver display: a basic 3D solution → blinking cross-hair (RTK Float) → solid double cross-hair (RTK Fix). On display-less units (Torch), a solid/white status LED indicates RTK Fix. In SW Maps the fix type reads 'RTK Fixed' (\~10 - 20 mm). If you stay on Float, check sky view and the correction connection.

### If the fix will not hold

SparkFun RTK models span two firmware families - RTK Express+/Facet (older 'RTK Firmware', u-blox ZED-F9P) and RTK Torch/EVK (newer 'RTK Everywhere Firmware', includes mosaic-X5) - so on-screen wording and menu layout vary by model and firmware; match fields by meaning (host, port, mount point, user, password). The standard NTRIP port is almost always 2101. Both paths give the same result.

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.