Connect your SeaTalk Instruments to your NMEA Network
If you have a Raymarine St60 Tridata, a ST40 Wind Instrument or other
SeaTalk devices, you can let the SeaTalk NMEA Bridge translate
Information from SeaTalk to NMEA.
With this function a navigation notebook or a chartplotter can now
display wind direction, wind speed, water depth, speed over water and
much more. Send Data from your NMEA Devices to SeaTalk Instrumens
The speed over water function of a ST60 tridata needs to be adjusted.
The paddle wheels are different, waterflow arround different types of
boat hulls are different - therfore your log need propper adjustent in
order to display a correct speed over water.
With the SeaTalk Nmea Bridge, you can send speed information from your
NMEA GPS to the SeaTalk Instrument. This makes adjustment accurate,
easy, fast.
These are just two verry simple examples.
With the SeaTalk NMEA Bridge you will many functions and features that
havn't benn possible before.
SeaTalk datagram coding/decoding
- Depth
- Water temperature
- Instument Light
- Speed over water
- Speed over ground
- Course over ground
- Apparent wind speed & angle
- Total & trip milage
- Latitude & longitude
- Time & Date
- Compass heading
- Rudder position
From
NMEA Protocol it reads GPRMC, xxMWV, xxMTW, xxDBT etc.
- Position Lat/lon ( RMC, GLL )
- GPS status ( RMC, GLL)
- Speed through Water ( VHW )
- Speed over ground (RMC)
- Heading (HDM, HDG)
- Time (RMC,ZDA)
- Date (RMC,ZDA)
- Water temperature (MTW)
- Waypoint Information (RMB)
Distance, Bearing, XTE, Name - Waypoint Information (APB, BWC - only for Bridge without LCD Display )
- Depth below transducer (DBT)
- Depth below Keel ( DPT)
- Water temperature (MTW)
- Total & Trip Milage (VLW)
- Wind angel & speed (MWV)
Status: Info on
LCD Display.
- Speed through Water ( from NMEA or SeaTalk )
- Speed over ground ( from NMEA )
- Depth ( from Seatalk )
- Water temperature ( from SeaTalk )
- Position Lon/Lat ( from NMEA or SeaTalk )
- Time
- Apparent wind speed & angle ( from NMEA or SeaTalk )
- Route / Waypoint names, bearing, cross track error, distance.
( Read from NMEA Gps )
Functions : Read NMEA Data -> Send to SeaTalk bus
- Speed over Ground ( SeaTalk 52 )
- Speed through Water
- LAT & LON ( SeaTalk 51 & 51 )
- Water Temp ( SeaTalk 27 )
- Special SeaTalk sentence $STALK,xx,yy,zz.... ( Sends any SeaTalk)
- Trip & Total Milage( SeaTalk 25 )
- Course over Ground
- Compass course
- Apparent wind speed & direction
- Next Waypoint Name, Direction, XTE
Functions: Read SeaTalk -> Send to NMEA port
- Depth ( $IIDBT )
- Apparent. Wind speed. & angle ( $IIMWV )
- Speed through water ( $IIVHW )
- Compass heading ( $IIVHW and $IIHDM )
- Water Temp. ( $IIMTW )
- Trip & Total Milage( $IIVLW )
- rudder position ($IIRSA)
- Position from SeaTalk GPS ( $IIRMC, $IIGLL )
- Speed over Ground from SeaTalk GPS ( $IIRMC )
The pushbutton
The bridge comes with a pushbuttons.
The pushbutton is used to switch between different display pages.
Another function is to switch on/off the display illumination.
Page1: Speed, Position,Trk etc. Page2:Wind data, Compass, time etc.
Page 3: Route & Waypoint Info
If the bridge is connected to other instruments on the SeaTalk bus, it
also switches on/off the lights of the other SeaTalk instruments. The
other way arround also works. If you switch on the light on any of your
SeaTalk instruments, the illumination of the display is also switched
on. ( This Function can be disabled)
Software
The SeaTalk NMEA Bridge project is sitll an active project. The Software will be improved continuously.
From the feedback of the users, new function will be added.
The
Sources of the software is available. If you know how to programm an
AT-Mega Processor in "C", you can change the software to whatever you
like.
Special Functions
The Bridge has a few special function for those of us who want to learn more about SeaTalk.
The Bridge can be configured to send all - even unknown - SeaTalk sentences to the NMEA Port.
It will send a "$STALK,xx,yy,zz...." record for every incomming SeaTalk sentence.
With this function we can monitor the SeaTalk Bus and we can learn and decode new SeaTalk sentences.
