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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


Update : In the picture above only two NMEA out ports are shown. Meanwhile all 4 NMEA out ports are available.

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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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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Ok thank you very much Frank. I will now stop scratching my head :lol: And I look forward to updating the firmware. My best regards. Pierre

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Hallo again you also asked :
Another question : could you tell me if Seatalk sentences coming up from my tiller (pilot RAYMARINE ST2000+) are processed by the multiplexer in order to have a remote control on the pilot from the chart plotter (PC using OPENCPN).
The multiplexer does receive compass data from the ST2000. I know that from the time when I tested my first SeaTalk Nmea Bridge with a ST2000+ Regarding the "remote control" - What you can do is make a waypoint ( or a route with several waypoints ) in OpenCPN and send that waypoint to the ST2000+. It will than steer the boat to that waypoint. OpenCPN sends waypoint-name, distance, direction and cross track error via NMEA to the multiplexer and the multiplexer forwards that data to the seatalk bus. The manual says :
In Track mode, the tiller pilot maintains a track between waypoints created on a navigation system. The tiller pilot computes any course changes to keep your boat on track, automatically compensating for tidal streams and leeway. To operate in Track mode, the tiller pilot must receive cross track error information from either: Bring the boat to within 0.1 nm of track. 2. Press auto. 3. Press -10 and +10 together to enter Track mode. 4. An alarm will sound and the display will alternate between: • the bearing to waypoint, and • the direction the boat will turn to take up the new track
That should work. I never tried it with a ST2000+ myself, but I tried it with other autopilots, and I'm pretty sure it will work with the ST2000+ as well. Of course you have to make sure, that "sending data to seatalk" is enabled. ( See config tool ) Best regards Frank

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Perfect !! That's the kind of problem that would have been relay hard to find from here. I'm glad you could sove it. Best regards Frank

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Re: Wifi connection

Hello Pierre,
...... Everything works fine except that I can not get the true wind using Wifi while I get it using the USB plug.
I just checked my source codes - and you are absolutely right. Currently the muxer calculates true wind and sends it to the USB port only. I guess that comes from the time when I implemented that true-wind calculation for one user who asked for it, and I simply forgot to finish that new function properly. Most users only needed true wind on the board computer, which is connected via USB port. I will add sending true wind to the NMEA-Out ports as well. I just need a couple of days to implement and test it. Thank you for reporting that. Best regards Frank

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Wifi connection (New Firmware V2.4, new Functions & Bug

Hi Frank, As you probably remember, I use your gadgetpool multiplexer on my boat. It works perfectly well. I use OpenCpn on a PC as a chart plotter and I decided this year to connect the PC using Wifi on to the multiplexer. So I added a Wifi access point to my installation. http://www.usriot.com/p/serial-wifi-ethernet-converter/ Everything works fine except that I can not get the true wind using Wifi while I get it using the USB plug. Do you have an idea on why I have the true wind via the USB and not via Wifi ? NMEA sentences seems to be correct : $IIMWV,112.50,T,005.30,N,A*3A $IIMWV,112.5,R,005.3,N,A*3C The relative wind is displayed both by USB and Wifi. Connections of the whole stuff is as follow : https://www.dropbox.com/s/szgbg2a4nt2f5vu/Liberdade_reseau_5_GB.pdf?dl=0 Best regards Pierre

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Problème USB link

Hi Frank, I found the problem ! On the St wind, on one Seatalk connector the 12V from the instrument was out or order. I take the 12V on an another connector and everything is ok! Thank's for help. Regards. Patrick

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