What you see: the app says "connection failed", "unauthorized", "401", or "bad password", and the status stays at SingleNo corrections at all. Your position could be off by several meters.Full definition. NTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.Full definition is the internet system that carries CorrectionsLive info from a base station about how far off the satellite signals are, so your rover can cancel out the error.Full definition from a CasterThe internet server that hands out correction streams. Your rover logs in to it, like tuning into a radio station.Full definition (the server) to your RoverThe receiver that moves around the job, like a survey pole or a drone. It uses the base's corrections to find its exact spot.Full definition (NTRIP explained).
What the messages mean
- 401 Unauthorized
- The caster got your request, but the username or password was missing or wrong for that Mount pointOne specific correction stream on a caster, like one channel on a radio. Each one comes from a certain station or network setup.Full definition. This is in the NTRIP spec published by BKG.
- Can't connect / timeout
- You never reached the caster. Wrong host or PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.Full definition, or no internet.
- A list of mount points instead of data
- See wrong mount point.
Fix it
- Check internet first. Open a web page on the same phone, controller or hotspot.
- Retype the host and port. No "http://" in the host box unless the app asks for it. Port 2101 is common, but use the one your provider gives you.
- Retype the username and password. They are case-sensitive. Watch for an extra space at the end when you paste.
- Check your account. Many state networks need yearly renewal, and some limit how many devices can log in at once with one account.
- Test with the provider's own app or portal, if it has one, to see if the login itself works.
Still stuck? Your provider's page on FixFinder lists their caster details where they publish them. Find it from the state map.