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SeaTalk NMEA Bridge 32 (Basic Line) without Display 119.00EUR

+ Shipping / Versandkosten

This is just our "baseLine" version. Please note that there's a product with extended functions availiable.

Click here to go to the new product pages


This product contains the for the last years established and proven technology. Please note that we do offer this product for the bargain hunter. We'll not change any functions or add features in this product ( except bugfixes ) in the future.
The SeaTalk <-> NMEA Bridge is a single chip computer, that translates information between SeaTalk and NMEA.
It can read & write NMEA and read & write SeaTalk data.


The bridge is also available with an LCD-display ( check our store ).
The repeater has 1 SeaTalk bus connector and 1 serial port for NMEA or PC connection


  • ATmega32 Processor
  • 1 * SeaTalk Port ( read & write SeaTalk )
  • 1 * NMEA Port ( RS232 & RS422 )
  • On board volatage regulator
  • Boot loader (to update to new Software Versions)
  • comes with printed manual and CD with all source codes, compiler,boot loader software

Here is a simple example on what you can do with the SeaTalk NMEA Bridge Connect your SeaTalk Instruments to your NMEA Network

click on the picture to get a bigger picture

  • Get data from your SeaTalk instruments to NMEA devices or to your computer
    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 haven't been possible before.

Additionally to the standard SeaTalk -> NMEA conversion, the bridge software offers a new - NMEA like - command $STALK.
With the command $STALK,xx,yy,zz the PC can send any SeaTalk command you like. Your PC just sends a simple text string, and the bridge handels the spezial 9-bit protocoll, the collision detection and the electrical connection to the SeaTalk bus. ( Either with your own software or with a standard terminal programm )
With this new command a normal pc or notebook can send any SeaTalk command and so it can control or manage SeaTalk devices. ( Example : Switch Illumination of SeaTalk instrument on/off, Change Display units from mph to knots and and and )
This special function is also available the other way arround.
The bridge can send every SeaTalk datagram as a $STALK,xx,yy,zz string to the PC.
This simple text string can be read and computed by the pc and so we can read information from the SeaTalk Bus, that have no corresponding NMEA sentence. ( Example : see above )

The bridge comes with a printed manual, all source codes of the bridge software, compilers for the Atmel processor used on the bridge, and bootloader software.
You can look at the software and change it to whatever you want.
( Programming knowledge in C for embedded proccessors is required )


The protocol converter is a research project

It is used for research on data communication, computer communication and data conversion with computers and instruments on board of boats.
It is just a navigation aid. For navigation allway use paper charts, compass, GPS etc. Never rely on data from this instrument.
Liability cannot be accepted for any damages, personal injuries or malfunctions caused by this converter.
To make sure that the SeaTalk-NMEA-Bridge is what you need, please read the manual before ordering.
A manual in PDF format can be loaded HERE
An overview of the operation modes and configuration can be loaded HERE

Available Options:
Model:
Items in stock : 10
This product was added to our catalog on Monday 01 May, 2006.
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Hello Juan, I am interested by your App on Androïd. Do you have now some picts of the Display on tablet or phone, pricing ? Also your hardware to convert Seatalk datagrams to RS232 is it available ? (I understand that you are not using a gadgetPool converter) Thanks for your help. Best Regards, Jean *************************************************** Verfasst am: Di Mai 06, 2014 3:07 am Titel: Antworten mit Zitat Helo Frank: Thanks for your quick response. As soon as possible I’ll put a brief description of the App with images of displays. I don’t have yet any customer. Only one (my friend) and I worked free for him. My intention is to obtain some profit selling this app worldwide for Internet. As I said in my first post, I’m not interested in selling hardware, for avoid the difficulties inherent to commercialization. The business model of selling software is easier (for me). I don’t think the open source is good for me as a business model. If I give free my work everybody ¿ how can obtain any return?. Or if I sell the first App with open source, I`ll not sell any more, even worse, other people would obtain profit selling my work as theirs. The App is only a prototype. I’ll need some time to finish it, and in order to sell it, develop a web site for that. My question for you is if you might be interested in selling my app in your web (when completely finished). I think in a commercial model like Sea Plotter. People can download free the App for test in a period of time, and if satisficed completely, pay for a license. Best regards Juan

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Hi Frank, First of all, many thanks for your reply ! Yes, I can believe that it would be useful to many users of Autohelm/Raymarine Course Computers which are SeaTalk1 (old or not so old) compliant only. There are many users worldwide of ST6000/7000, Type 100/300 and S1/S2/S3 CC. Please, let me explain further : As you are aware of, SeaTalkNG (NMEA2000) is the main standard today for marine network instruments and autopilot Raymarine communications. SeaTalkNG is embedding Seatalk1 wiring but does not support all SeaTalk1 functions. Nomore Seatalk1 products are manufactured nor supported today. As a main example, a SeaTalk1 Course Computer can be controlled/displayed by a new SeaTalkNG Control Unit (as the Raymarine P70 or ST70) but only for the +/-10, +/-1, Auto Standby and Track functions, exactly as a 128SD Bridge can do it. Commission is necessary not only at the first time but : Calibration process of the CC or parameter change is needed each time something is to be replaced or repaired on the boat, i.e. new compass fluxgate or compass fitted on an other place, CC itself, Control Unit, rudder or wheel system, mechanic/hydraulic and so on... Also when the boat itself is changed ! To enter the calibration process (compass linearization, alignment and initial settings) or to change the settings during navigation (rudder amount, sensitivity level...), the user needs a fully Seatalk1 compliant Control Unit as the ST6000/7000, ST6000+/7000+, ST6001, ST6002, ST8001/ST8002 - or a well known ST600R Remote Control. As the above SeaTalk1 Control Units are becoming very rare on the second hand market and as the new SeatalkNG ones do not support the Seatalk1 calibration process, the user is forced to abandon all electronic components of his autopilot on the shelf and to buy a new one. Very expensive ! The Bridge 128SD could be used as it is like a SeaTalk1 Control Unit but unfortunately not like a ST600R remote because of the lack of calibration. I can send you a Type 100/300 CC mother board or a ST4000+ Autopilot for testing purpose, no problem. Thanks for the C source code. I am afraid that it will take a lot of time for me to re-learn the C compiler and linker... For sure you will be more efficient than me. Please let me know your understanding and aim about. Best regards, Jean

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Hello Jean-Luc,
Do you plan to implement calibration functions in a next software release ?
well - currently I have not planned to add this calibration functions. Do you think there is a demand for having this special calibration function in the SeaTalk Nmea Bridge. I thought this settings are only made on commission of the autopilot, and I personally would prefer to make that directly on the autopilot. Well - could be I'm wrong. If you see a demand for implementing it into the Bridge, I could try to do it. I don't have an autopilot available, so I would need someone to test it and give feedback. If you would like to change the software yourself - I'l I can send you the sources. Best regards Frank

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vklein hat mir nach E-Mail Kontakt seinen Link zugeschickt. Ich werde nachschauen was passiert ist und berichten. Frank Wallenwein

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Parameter calibration for old SeaTalk Course Computers

Hello Frank, I am using the Built-In autopilot remote control (+10,+1,-1,-10, Auto, Standby,Track). Very useful for old Seatalk1 Course Computers like ST6000/7000, Type100/300, ST4000+/5000+, S1/2/3/G and SPX... I am wondering about extended functions related to the SeaTalk calibration of CC parameters : Do you plan to implement calibration functions in a next software release ? I mean : - the display of the 88 datagram values ( Autopilot Parameter sent by AP), and then related commands to set values : - press longer than 1S on Standby key to enter Compass-User/Dealer Cal (datagram number ?) - 93 ( Enter AP-Setup), - 92 (Set Autopilot Parameter) - 87 (Set Response Level) - 91 (Rudder gain) ... Or do you know somebody who worked on this issue ? Thanks for your help. Best Regards, Jean-Luc :D

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Seatalk Link - modification.

Frank, PS: After your helpful detail about my choice of link, I decided to just wire the power to a 12vdc plug which will make it more portable and useful. Since I can connect to 0183nema wires to the chartplotter and in a different config connect to PC with a RS232-USB Converter and a USB hub off the PC. I can also take it with me to another ship with RM ST.

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True Wind Speed and Direction

After removing old Radar and Screen and straightening out the old RM Wheelpilot ST4000 I found some wires loose at the back of the control. I installed the new B&G T12 and 4G Radar as if I had heading on the N2K bus with the Simnet to N2k cable up to the RI10 Radar Interface, I attached the ST Link to T12 nmea0183 and hoped for the best. Once in the water, the system worked and Depth and Heading appeared on the T12 Display! The heading only appeared after the Autopilot (and old RM fluxgate) was turned on (standby). The ultimate goal was to see if the slow signal would be adequate for Radar Overlay. With the AP and Fluxgate on, the B&G T12 recognized the heading and allowed switching to Overlay mode. The radar overlay was slower than the charts, and thus there was delay, particularly with turns and seaway, but the overlay it does work until we get a better heading compass aboard. Thank you for the seatalk link. Its been very helpfful.

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nmea link defekt?

Ich habe seit 2009 ein nmea-link im Einsatz. Nun habe ich festgestellt, das über die usb-Schnittstelle keine Daten mehr ausgeliefert werden. Ich habe den link ausgebaut und getestet. Nach Anschluss von 12V und USB verbunden mit putty und 4800 Baud 1. $xxx gesended --> keine Reaktion 2. Die gelbe LED blinkt nicht wei früher, sondern ist permanent an Irgend eine Idee was los sein könnte? mfg Victor

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NMEA to Bluetooth Adapter/ Charging Power Supply

Hello, this little gadget connects to NMEA and transmits all data via Bluetooth. So you can use your favorite navigation software on laptop, tablet or smartphone wirelessly. e.g. take your tablet/smartphone to the cockpit... Additionally it acts as an 5V/1A power supply for charging smartphone or tablet ... The first prototype is ready for testing now :) prillo

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Will you give interested users support or do you have a NasaClipperWind --> NMEA gadget available for users interested ?[/quote] Yes, I will give support to interested diy users.... In the meantime I got a positive feedback of this little gadget. It works like a charme my sailing friend told me..

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