NMEA Integration

Modified on Fri, 8 May at 4:22 PM

KnotWise supports importing instrument data from your onboard electronics via NMEA, eliminating manual entry of navigation values and reducing the risk of transcription errors.

Subscription required: NMEA live data is available on the Share plan. Compare plans at knotwise.app/pricing →

Supported standard

KnotWise connects via NMEA 0183 over WiFi (TCP or UDP). Most NMEA-to-WiFi bridges and repeaters — including those connected to NMEA 2000 networks — publish their data as NMEA 0183 sentences over the local network, which is the format KnotWise reads.

What data is imported

When connected, the following log entry fields can be populated automatically from your instruments:

Position (Latitude / Longitude)
SOG and COG (Speed and Course Over Ground)
True and apparent wind speed and direction
Barometric pressure

How to connect

NMEA connection is configured in Settings → Instruments. Your device must be on the same local WiFi network as your NMEA data source. Enter the IP address and port of your NMEA bridge — refer to your hardware documentation or the table below for default values.

Supported hardware

Any standard NMEA-to-WiFi converter is compatible. The following devices are confirmed to work with KnotWise. Default IP and port values are listed — most devices allow these to be changed via a built-in web interface.

Device	Default IP	Port	Protocol	Notes
SWAY	192.168.4.1	10110 / 2001	UDP / TCP	Can connect to an existing WiFi network
SEAYAK Seatalk1 to NMEA WiFi Bridge	192.168.4.1	23	TCP	Converts Raymarine SeaTalk to NMEA 0183
Vesper WatchMate XB-8000	192.168.15.1	39150	TCP	AIS transponder with WiFi
Yacht Devices YDWN-02	192.168.4.1	1456	TCP	NMEA 0183 Wi-Fi Gateway
Yacht Devices YDWR-02	192.168.4.1	1456	TCP	NMEA 0183 Wi-Fi Router, also supports SeaTalk
Quark-Elec QK-A024	192.168.1.100	2000	TCP	AIS receiver with NMEA multiplexer
Yacht Devices YDWG-02	192.168.4.1	1456	TCP	NMEA 2000 Wi-Fi Gateway, also outputs NMEA 0183
Shipmodule MiniPlex-3Wi	192.168.1.45	10110	TCP	Multiplexer, also supports SeaTalk
Simrad NSS8 + GoFree Wifi-1	192.168.0.10	10110	TCP	For Simrad MFDs
B&G Zeus3	192.168.76.1	10110	TCP
Easy TRX (Weatherdock)	192.168.16.254	8080	TCP	AIS transponder
PredictWind Data Hub	10.10.10.1	11102	TCP

Specifications and default values may change. Always verify the current technical details on the manufacturer's website before configuring your connection.

Raymarine: The built-in WiFi on current Raymarine displays uses a proprietary protocol that is not compatible with KnotWise. A standard NMEA-to-WiFi bridge connected to the NMEA 0183 output — or a SeaTalk-to-NMEA bridge — is required for Raymarine installations.

Manual override

All NMEA-populated fields can be manually edited at any time. Instrument data is a starting point — you remain in full control of every log entry.