Emlid Flow: NTRIP on Reach (RX / RS3 / RS2+)
Use this if you already own a Reach rover and you want network RTK without standing up your own base or Emlid Caster. Flow uses the phone or tablet's internet and sends corrections to the receiver over Bluetooth. Works with RTCM3 (MSM4 and later), which is what rtkUSA sends.
NTRIP settings
Username and password come from your rtkUSA dashboard. Do not use your website login.
| Field | Value |
|---|---|
| Address | rtk.geodnet.com |
| Port | 2101 |
| Mount point | AUTO (all caps) |
| Username | From your rtkUSA dashboard |
| Password | From your rtkUSA dashboard |
| Send receiver's position (GGA / NMEA) | On. Required. |
AUTO needs your position. If GGA is off you will sit on FLOAT.
Steps
- Put the Reach outside with a clear sky. Open Emlid Flow and connect to the receiver.
- Open Correction input.
- Tap Add profile. Name it rtkUSA.
- Enter the table above. Mount point is AUTO in all caps.
- Turn on “Send receiver's position to the provider” (NMEA GGA). Save.
- If Flow asks for a coordinate system on the NTRIP connection, pick Global CS. Put NAD83 / State Plane / your site calibration on the survey project, not on the caster profile. Mixing those two is how maps miss the county layer by a meter.
- Wait a few seconds outdoors. Status in the top right: SINGLE (meter) → FLOAT (corrections in) → FIX (centimeter). Do not stake until FIX.
- You can leave Flow in the background. Reach RX keeps NTRIP after the screen locks.
Reach uses about 16 MB of cell data per device over an 8-hour day. One rtkUSA account is one stream.
No FIX?
- GGA / send receiver's position is on
- Mount point is AUTO, all caps
- Address rtk.geodnet.com, port 2101
- Dashboard creds, not website login
- Phone has cell data
- 30 degrees of open sky
- Within about 25 km of a live station
- Only one device on the account
Do not run Emlid Corrections (Point One) on this profile at the same time. One correction source.
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