Interesting indeed. Going through this now, here are my learnings:
NMEA2200 ("N2K") and seatalk are all CAN bus data backbones, developed by
bosch for automotive use and same as devicenet used in industry for years.
Seatalk NG data is exactly the same as N2K, but Raymarine uses a similar,
but proprietary connector design and conductor count. This is why you need
adaptor cables between seatalkNG and N2K
The N2K data itself is the same as seatalkNG, even if the cable and
connectors are slightly different.
To share N2K data with an external device (PC, tablet, whatever) you need
piece of hardware called a gateway. This usually includes a software tool
that allows you to read the N2K "sentences" and actually observe the
network traffic. (cool!) the Actisense NGT-1 is such a gateway, hardwired
only.
http://www.actisense.com/products/nmea-2000/ngt-1/ngt-1.html
There are a few wifi gateways available also. These are quite expensive.
There is no Bluetooth gateway that I have been able to find, likely because
Bluetooth speeds are simply too slow for N2K. This is not true of pokey,
old-school Nema 0183, where Bluetooth access is supported (via a
multiplexer).
http://www.digitalyachtamerica.com/index.php/en/products/interfacing/nmea-to-wifi-adaptors
Back on cabling. N2K cabling and accessories are derived from (a subset
of) the devicenet standard. You can use the correct form factor devicenet
cable and connectors for N2K applications. Here is an example of an
industrial vendor who promotes the N2K subset of their offering.
http://www.molex.com/molex/products/family?key=nmea_2000_cables_and_connectors
here is a presentation explaining the N2K standard. There are others that
cover this ground well.
http://www.nmea.org/Assets/nmea%202000%20mets%202011%20presentation.pdf
Message: 6
Date: Fri, 11 Sep 2015 14:38:54 +0000
From: "Hoyt, Mike" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: Re: Stus-List NMEA 2000 cabling
Message-ID:
<[email protected]>
Content-Type: text/plain; charset="utf-8"
>snip
Does this mean that some sort of device such as iPad, iPhone, Android
phone, Windows Tablet can pick up this wifi signal and from that position,
wind speed, boat speed, depth, etc? I currently have Windows Surface 2
with Navionics Boating HD and this could be useful. (we also have all
those other devices as well). Is there any app that we should be using on
these devices with the wifi to make them repeaters?
Thanks
Mike
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