• Use distinct SSIDs for each Wi-Fi band (2.4 and 5 GHz) to facilitate connectivity.
• The Vision-RTK2 will only connect automatically to the network marked as "default"
in the web interface. However, marking a new Wi-Fi connection as "default" does
not activate this connection automatically; the user must press the "connect" button.
• The IP address, netmask, gateway, and DNS of each connection can be configured.
• Wi-Fi client connections are only partially reliable; they sometimes require multiple
attempts to succeed in connecting.
• If the Wi-Fi client connection is lost, reconnecting can take up to two minutes.
• The network SSID must match the regular expression ^[-_a-zA-Z0-9]{2,32}$.
• The Wi-Fi chip regulatory domain is configured as "passive automatic" (i.e., the chip
monitors the existing Wi-Fi channels and uses only those valid in the region).
5.2.2. Network data ports
The following network data ports are available over Ethernet and Wi-Fi:
Port Protocol Clients Function
21000-21004 Raw TCP/IP socket Multiple
VRTK data output ($FP messages) and
input (wheelspeed, RTCM3)
23010 Raw TCP/IP socket Multiple
NTRIP data stream
(RTCM3 messsages from the NTRIP caster)
80 HTTP Multiple Web interface (incl. sw update)
123 UDP Multiple NTP time server (Network Time Protocol)
n/a ICMP n/a ICMP traffic (ping, etc.)
53 UDP Multiple Domain (DNS) service for internet sharing
Table 5.2.: Network data ports
Notes:
• The NTP server only provides timing information if the VRTK2 sensor can access
precise time from Internet servers or GNSS.
• Only one simultaneous input stream can be handled correctly on TCP port numbers
21000 – 21004. For example, to input RTCM3 and wheelspeed via the network, use
one port (e.g., 21000) for wheelspeed and another (e.g., 21001) for corrections.
• The Vision-RTK2 rejects connection attempts to any other port (either blocked by
the firewall or there is no service on that port).
5.2.3. Outbound connections
The Vision-RTK2 makes outbound connections to the Internet to the following servers:
• 0.openembedded.pool.ntp.org – NTP time sync.
• NTRIP caster server.
While the web interface is open in a client browser:
• 8.8.8.8 – Checking internet connectivity.
The web interface (i.e., the client browser, not the VRTK2 itself) connects to:
• api.mapbox.com - Map data used on the Fusion status page.
Vision-RTK 2 | Fixposition Positioning Sensor 16
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