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NMEA Multiplexer with bidirectional SeaTalk port and USB 237.99EUR

+ Shipping / Versandkosten

NMEA Multiplexer with bidirectional SeaTalk and USB Port

The gadgetPool NMEA & SeaTalk Multiplexer is a NMEA-Multiplexer with additional Seatalk port and USB-port.
With this NMEA-Multiplexer you can connect serveral NMEA devices, read data from a SeaTalk network, write Data to your Seatalk network and also connect your PC

  

Multiplexer ports :

  • 4 galvanic isolated NMEA 0183 inputs.
  • 2 NMEA 0183 outputs
  • 1 galvanic isolated SeaTalk port. SeaTalk Data are translated into NMEA sentences, NMEA Data are translated into Seatalk data
  • 1 USB port for PC. With the USB port, a PC can send and receive NMEA Data.

What is a Nmea-Multipelxer good for ?

NMEA devices can send data and/or receive data from other NMEA devices. .

According to NMEA standards, a sender can send it's data to up to 4 receivers.

For a receiver, It is not possible to receive data from more than one sender.
A NMEA receiver can only receive data from one other device at a time.
I.e. With one NMEA input port, a Chart plotter can not receive position from a GPS device and depth data from a depth sounder at the same time.

In order to be able to receive data from more than one NMEA source, a NMEA-Multiplexer has to be placed in between the senders and the receiver.

A NMEA-Multiplexer receives data on separated input ports from different NMEA devices.
It buffers this incoming data, filters them and sends them out well ordered to the receiver.

gadgetPool NMEA-Multiplexer can receive data from :

  • up to 4 NMEA devices ( i.e. GPS, depth sounder, wind instruments, AIS etc.. )
  • 1 board PC via USB
  • 1 SeaTalk network.

The Multiplexer buffers, filters and send this data in proper order to :

  • 1 board PC via USB
  • up to 4 different types of NMEA receivers
  • to the Seatalk network

Housing and terminals

Housing
The multiplexer comes in a nice and sturdy metal housing.
For easy installation and service, all terminals for NMEA, SeaTalk and power supply are detachable

NMEA inputs


NMEA outputs

SeaTalk connection

Currently the following NMEA sentences can be produced based on incoming SeaTalk data:

  • $IIDBT Depth
  • $IIVHW Speed through water
  • $IIMTW Water temperature
  • $IIVLW Total milage, trip milage
  • $IIMWV Wind direction and wind speed
  • $IIHDM Heading magnetic
  • $IIRMC Speed over ground,heading, longitude, latitude , time, date
    Optional an aditional $IIGLL sentence can be sent.
  • $IIRSA Rudder

Power supply

Technical data :

  • Operation voltage : 10-30 Volt DC.
  • Power consumption : 60 mA ( 100 mA max. at full load)
  • Inputs : 4 * NMEA-0183 ( RS-422 ) galvanic isolated
  • Outputs : 4 * NMEA-0183 ( RS-422 )
  • Network : 1 * SeaTalk in/output galvanic isolated
  • Baudrates : 1200 Baud - 38400 Baud ( USB up to 57600 Baud )
  • Memory : 2*4 kB Buffer for each NMEA channel. ( 4kB send/ 4kB receive)
  • PC-interface : 1 * USB virtual serial port for NMEA sending and receiving



Items in stock : 4
This product was added to our catalog on Saturday 26 November, 2011.
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I forgot to tell you, what devices are connected. I have a ST 30 Wind Autohelm, and ST4000+, and also a Bidata ST40 Depth/Speed. Regards. Patrick

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Hi Frank, Thank's for answer! For the moment I could not do some test, because, I'm at home, and I will try to test, when I will be back on boat. The link is with me at home, and command $SNBSE,0,1 put the parameter to "1" . The response is OK. Before this parameter was to "0". I will contact you on my boat, but perhaps the next week. Regards. Patrick

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Hello Mauline, ok. Let's try to find out what's going on. You say, you never got any Seatalk data from the SeaTalk devices, but you can "talk" to the Link with CuteCom. That's the first problem we should solve. Could you tell me what kind of seatalk devices you have connected ? There should be SOME seatalk data, but it might be helpfull to know what you have connected. When you see NOTHING - well what comes to my mind first is - how is the SeaTalk Bus connected. I'm sure you did it correct, but maybe you could tell me which wire it connected to which terminal. Since you can talk to the link, you could switch ON the raw SeaTalk data output. That would show us if we receive anything from the SeaTalk Bus. Connect to the link with cutecom (or whatever you have on the PI) and type $xxx. Please make sure, that cutecom is set up to send CR and LF when you press ENTER. If the link replys with $xxx, we know the connection from the PI to the link is working. You could also try $SWVERSION if you like. Now type $SNBSE,0,1 and press enter. Now type $SNBSE,0 and press enter. The link should reply with $SNBSE, 0, 0.001 and from now on you should see $STALK sentences whenever seatalk data arrive. Regarding the raspberry is not connecting on bootup. This can not be caused by the software update. The USB->RS232 controller is a FTDI chip, that handels the USB connection all by itself. There is no software involved. Maybe you could reboot the PI, open a terminal and tell me what [code:1:f69a7f0ae1]dmesg | grep USB[/code:1:f69a7f0ae1] shows. This should tell you if PI has found the USB chip. You should see something like [code:1:f69a7f0ae1] usb 1-1.4: New USB device found, idVendor=0403, idProduct=6001 FTDI USB Serial Device converter detected[/code:1:f69a7f0ae1] Of course it could be a hardware problem with the SeaTalk Link itself. But please let's first try if we can solve the problem. If not, I just send you another link. No Problem. Best regards Frank

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After upgrade same problem!

In 1.69, I can't collect any data from Seatalk bus. The Seatalk NMEA link get a problem, because to dialog with it, I have to unplug and plug with power on. On normal startup or reboot it's not possible.... Why? I don't know. I'have try with my Raspberry and a PC whith Linux, it's the same thing. Could you give me,......if you read sometimes this forum, some help? Thank's a lot.

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Version 1.69

I just upgrade my link to 1.69 version. Now at reboot, Raspberry don't see the USB link. No answer from Cutecom. In have to unplug and plug again the usb stick(with power on) to access by Cutecom.... Strange. I'm not on the boat, so I can't see, if data arrive from Seatalk bus. But with 1.65 version, everything where OK at reboot!

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Rapsberry PI 3+Opencpn

I've tried to use the NMEA Link with my Seatalk instruments. I connect the NMEA link USB to my Raspberry PI 3 with Opencpn. I use Cutecom on /dev/ttyUSB0 to dialog with the usb link. Every thng is OK. $SWVERSION give me 1.65. All dialogs are OK but in the screen of Cutecom (as minicom or hyperterm), i never see sentences from Seatalk. If with Cutecom I open /dev/ttyUSB1 ( USB GPS), I can see all the data from gps.... I don't understand why I never see data from my Seatalk instruments. Of course I see nothing on Opencpn. Please, have you and idea. Perhaps power problem with the raspberry port usb, or a bad configuration of the link...? Thank's a lot for anwer. Patrick

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Honestly - I have no idea. I guess I simply would try to leave the depth transducer connected, disconnect the speed transducer and see what it shows when you send STW from the bridge. Not sure if it works though. Cheers Frank

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SOG ST60 tridata

Hi Frank, I want use the bridge to take the SOG from GPS and send it as STW to ST60 Tridata. From your post I've understood that in this case the ST60 must be set as slave, but, it's a tridata so I need it for the depth, Do you know if it can be slave only for the speed but not for depth? Thanks mg

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Vielen Dank, dass Sie sich darangesetzt haben! Leider läuft es auf meinem Raspy bisher nicht. Ich habe die Pakete qt4-dev-tools und qtcreator installiert und versuche die Datei auszuführen... Muss ich noch andere Pakete installieren? Gruß, Harm Meiners

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So - eine erste unstable Testversion ist compiliert und kann probiert werden [url=http://www.gadgetpool.de/nuke/modules.php?name=Downloads&d_op=viewdownloaddetails&lid=71]Multiplexer_stConfig_Tool_for_RaspberryPi_2[/url] im Downloadbereich. Gruss Frank Wallenwein

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