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SeaTalk NMEA Bridge with repeater display and AluStyle housing
SeaTalk NMEA Bridge with repeater display and AluStyle housing
199.00EUR
148.75EUR
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SeaTalk NMEA Bridge128SD without display with USB 154.70EUR

+ Shipping / Versandkosten

The SeaTalk(R) <-> NMEA Bridge is a stand alone single chip computer, that translates information between SeaTalk and NMEA. It can read & write NMEA and read & write SeaTalk data.
(SeaTalk is registered trademark of Raymarine Ltd. Raymarine)

  • It translates SeaTalk data into NMEA data, so that you have depth, wind speed and direction, water temerature, position, rudder angel, speed etc. available on your board pc.
  • It translates NMEA data into SeaTalk, so that you can, for example, control the autopilot from the navigation software on the board pc.
  • The seatalk bridge comes with housing.
  • With the latest software version, the bridge also calculates true wind heading and speed from either speed over ground or speed through water.
    Hardware is allready prepeared for logging feature. Will be available soon in one of the next software versions. (New software can be installed by user)

    Front side,
    Bridge without display
    and without keypad

    1 * SeaTalk , 1 * NMEA ,
    1 * RS232 , 1 * USB


    • ATmega128 Processor
    • 1 * SeaTalk Port ( read & write SeaTalk ), galvanic isolated
    • 1 * NMEA Port ( read & write NMEA data ), IN-Port galvanic isolated
    • 1 * RS232 Port ( read & write NMEA data )
    • 1 * USB Port ( read & write NMEA data )
    • On board volatage regulator for operation with 12 Volt or 24 Volt
    • Boot loader (to update to new Software Versions)
    • Comes with printed manual and CD.
    • For developers, all source codes, compiler,boot loader software are available upon request.

    Baudrates for USB port and NMEA ports can be adjusted seperately from 300 to 38400 Baud.

    Here is a simple example on what you can do with the SeaTalk NMEA Bridge.
    Connect your SeaTalk Instruments and your NMEA Network
    Have data from SeaTalk devices and from NMEA device combined on your board computer.

    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, the SeaTalk NMEA Bridge will 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 through water and much more.
    • Send Data from your NMEA Devices to SeaTalk Instrumens.
      A ST60 Tridata can display Speed over Ground (SOG). The SeaTalk Nmea Bridge gets SOG from your GPS and sends it to the St60.
      The speed through water (STW) 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 STW.
      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 and USB drivers.

    More Information

    • A manual in PDF format can be loaded HERE
    • More information, updates and latest news can be found on our MyGadget project pages
    • Users comments and discussions can be found in our FORUM

    For developers, all source codes of the bridge software, compilers for the Atmel processor used on the bridge, and bootloader software is available.
    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 must not be used as the main source for navigation information
    The user allways must to use charts and other conventional navigation aids.
    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

Items in stock : 19
This product was added to our catalog on Sunday 11 May, 2014.
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Nema Bridge to Wifi to IPAD

Hi I have just completed interfacing the SeaTalk NMEA Bridge128SD with a USR=WIFI module to stream the data on WiFi via the RS232 port. I do all my offshore navigation on an IPAD but then discovered not many racing Apps use wifi, most use bluetooth. I was considering this when I came across an interesting page on Zifigo who make Iregatta offering a limited number of beta test vesions. http://www.zifigo.com/?q=node/666 Looks like an app is on the way, I am hopeful of getting one to evaluate. Maybe some other yacht racing members may find this link interesting. The SeaTalk NMEA Bridge128SD is a well made solution. I am looking forward to playing with it and the race info it provides. Best regards

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I can't download the latest firmaware version
Well - I just tried it again and it worked for me. If you still have problems to get, just send me a mail and I can sent it to you. Frank

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I can't download the latest firmaware version

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Thank you but I've not receive your mail Can you send it again ?

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Apparently this did not ever make it into a product. I'd still be interested in one, so any other advice or pointers? Thanks, Harri

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Hi, Is the true wind calculation based on STW or SOG, or is it configurable? I'd prefer SOG if present. Thanks, Harri

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NMEA to WiFi Adapter (network udp & tcp)

Hello, I have developed a NMEAtoWiFi adapter. [img:3e151e495f]http://dg5lm.darc.de/Bilder/IMG_7555_1.JPG[/img:3e151e495f] By using this adapter you can connect your notebook for plotting and navigation and additional devices like tablet or smartphone to your existing NMEA source at the same time. No need for cable splitting... The device can act as an accespoint or can be connected to an existing WiFi network on your boat. I have successfully tested connection to NV ChartNavigator and OpenCPN on notebook and android smartphones. Combined NMEA data (AIS & GPS) came from the Lowrance LINK-8 and were transmitted by TCP network to the NV ChartNavigator. On android tablet and android smartphone you can use the builtin UDP connection to get data from NMEAtoWiFi adapter. regards prillo[/url]

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Hi Frank, I uploaded the new versions of the config tool v1.14 and firmware V2.8. Everything works perfectly well, especially the "true wind" data are now being sent over NMEA ports. Thank you very much for this great work. Best rregards Pierre

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Ok Frank, thank you very much for this update. As you saw it on the shema of my installation on board, the multiplexer is very solicited too. So it is with pleasure that I will report to you on the operation of the multiplexer. Best regards. Pierre

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New Firmware V2.4 and new config tool V1.13

Hi Pierre - and everybody else how might be interested. I just uploaded a new package to our download section. It contains * latest Firmware V2.4 * new config tool V1.13 - With this firmware and config tool, you can configure to which port you could like to have sent true-wind data calculated by the multiplexer. - This firmware also contains some bugfixes for problems we found over the last weeks. A user from the far north :) really help us a lot to find and fix problems that could arise when the multiplexer is operated at its limits. He used all 4 Ports + SeaTalk, some ports set to 38400 Baud and others with just 4800 Baud. In this situation it could come to data corruption due to buffer overflow. - Since I don't have a NMEA wind instrument for testing, maybe you could test it give a short feedback, so that I know if it works as expected. Thank you and best regards Frank

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