NTRIP Client

Caution

This Router App has been tested on a router with firmware version 6.3.10. After updating the router firmware to a higher version, check whether a newer version of the Router App has also been released and update it accordingly for compatibility.
Internal GPS in Advantech routers does not support corrections. An external GPS is required for using NTRIP.

Description

This Router App is used to obtain a more accurate location via the NTRIP protocol — a general stateless protocol based on HTTP/1.1. Each router with this Router App enabled acts as an NTRIP Client. The NTRIP Client connects to an NTRIP Caster (server) and requests data from a selected MountPoint. If the client does not know which MountPoint to connect to, it can request a list of active MountPoints from the Caster. This list describes the corrections available from each MountPoint. The Caster then begins forwarding GNSS corrections. Communication between the NTRIP Client and NTRIP Caster is similar to communication between a web browser and a web server, as shown in the figure below.

Note: VRS MountPoint represents a virtual reference station.

The web interface of the Ntrip Client Router App is accessible by clicking the Router App name on the Router Apps page of the router's web interface. The left pane contains menu sections for Configuration, Status, and Customization. The Customization section contains only the Return item, which returns to the router's main web configuration interface.

Configuration

Configuration of the Ntrip Client Router App is performed via the form on the Global page in the Configuration section of the Router App's web interface. The first item — Enable Ntrip Client — activates the Router App. The remaining items are described in the sections below.

Connection Settings

Enter the IP address of the NTRIP server and the TCP port on which it runs (2101 is the standard). Use the Browse button to select the most appropriate MountPoint (the list may take a few seconds to load). If you know the exact name of the required MountPoint, you can enter it directly into the MountPoint field. Username and password are optional — some servers require credentials, others do not. Finally, set the reconnection interval in seconds.

Item	Description
IP Address	IP address (or domain name) of the NTRIP Caster.
TCP Port	TCP port on which the NTRIP Caster runs (2101 is the standard).
Username	Username for logging on to the selected MountPoint.
Password	Password for logging on to the selected MountPoint.
MountPoint	Name of the selected MountPoint. Use the Browse button to select a MountPoint from the list of active MountPoints on the NTRIP Caster. The list uses the "mountpoint" ("identifier") format.
Reconnection Interval	Time interval (in seconds) after which this Router App retries connecting to the NTRIP Caster if the previous connection failed.

Connection settings items

Target Settings

The Target Settings define the GPS destination to which corrections are sent. Advantech routers support only external GPS, so the available options are PORT1, PORT2, or a virtual port (ROUTER APP). The ROUTER APP option requires a custom Router App to create this port and manage data transmission.

Item	Description
Target	Destination for sending corrections. Options: PORT1, PORT2, ROUTER APP.
Baudrate	Communication speed.
Data Bits	Number of data bits.
Parity	Control parity bit: • none — No parity bit is sent. • even — Even parity is sent. • odd — Odd parity is sent.
Stop Bits	Number of stop bits (one or two).

Target settings items

Source Settings and NMEA Generator

Some NTRIP servers support receiving your coordinates so they can provide corrections tailored to your exact location. When Send NMEA is enabled, the router's coordinates are sent to the NTRIP server. The NMEA GPGGA Interval sets how frequently the Router App sends coordinates to the NTRIP server. Setting this to 0 sends coordinates immediately as they arrive from GPS, without any interval.

The coordinate source can be an external GPS connected to PORT1 or PORT2, a ROUTER APP (a custom port via a user-developed Router App), or the router's INTERNAL GPS. Alternatively, fixed coordinates can be entered manually using the NMEA Generator section — this is only required when the NMEA GEN source option is selected.