NMEA 183 V3.1
 

Anibody can tell me the diferences betwen V3.1 and V2.0? Or better,
who have the NMEA 183 specs can send me a copy? I read somewhere that
the V 3.1 alows for more than one talker: this is true?

I am interested specifically in the RMB, RMC, BWC, XTE, DSC, DSE, to
interface autopiots and VHF/DSC radios.

Thanks

Pascal Honcalves

"Pascal Goncalves" wrote in message
om...
Anibody can tell me the diferences betwen V3.1 and V2.0? Or better,
who have the NMEA 183 specs can send me a copy?

The NMEA specs are copyrighted material and can only be obtained, at a cost,
from www.nmea.org.

I read somewhere that
the V 3.1 alows for more than one talker: this is true?

No. Data from more than one talker can only be combined using an NMEA
multiplexer.

Meindert

Take a look at http://vancouver-webpages.com/peter/nmeafaq.txt

Regards,
Gerard van Toornenberg, Lemmer @ N 52° 51.352', E 05° 41.834' Nederland
Email :
Homepage : http://members.home.nl/gvantoornenberg/


"Pascal Goncalves" schreef in bericht
om...
Anibody can tell me the diferences betwen V3.1 and V2.0? Or better,
who have the NMEA 183 specs can send me a copy? I read somewhere that
the V 3.1 alows for more than one talker: this is true?

I am interested specifically in the RMB, RMC, BWC, XTE, DSC, DSE, to
interface autopiots and VHF/DSC radios.

Thanks

Pascal Honcalves

"Meindert Sprang" wrote in
:

No. Data from more than one talker can only be combined using an NMEA
multiplexer.

Meindert



Any particular BRAND of NMEA multiplexer come to mind?.....(c;

"Gerard van Toornenberg." wrote in message
...
Take a look at http://vancouver-webpages.com/peter/nmeafaq.txt

That info is pretty old. More like NMEA-0183 V2 or so. V3.1 has a lot of
sentences with extra/new fields added.

Meindert

"Larry W4CSC" wrote in message
...
"Meindert Sprang" wrote in
:

No. Data from more than one talker can only be combined using an NMEA
multiplexer.

Meindert



Any particular BRAND of NMEA multiplexer come to mind?.....(c;

Well, ShipModul, of course. Are there any others? :-)

Meindert

Meindert Sprang wrote:

"Pascal Goncalves" wrote in message
om...

Anibody can tell me the diferences betwen V3.1 and V2.0? Or better,
who have the NMEA 183 specs can send me a copy?


The NMEA specs are copyrighted material and can only be obtained, at a cost,
from www.nmea.org.


I'm a little confused about this. There are numerous explanations of
the NMEA sentences on the net, examples are Peter Bennet and Glenn
Baddeley's web sites:

http://vancouver-webpages.com/peter/nmeafaq.txt
http://home.mira.net/~gnb/gps/nmea.html

Those seem to contain most or all the NMEA 0183 information that anyone
would want. If you paid NMEA's sort of costly membership fee and
acquired their not too cheap specs, what more would be gained by doing
that?

Do you have to be a NMEA member to use the standard in firmware? Or
software?

Jack

--
Jack Erbes in Ellsworth, Maine, USA - jackerbes at adelphia dot net
(also receiving email at jacker at midmaine.com)

"Jack Erbes" wrote in message
...
I'm a little confused about this. There are numerous explanations of
the NMEA sentences on the net, examples are Peter Bennet and Glenn
Baddeley's web sites:

http://vancouver-webpages.com/peter/nmeafaq.txt
http://home.mira.net/~gnb/gps/nmea.html

Those seem to contain most or all the NMEA 0183 information that anyone
would want. If you paid NMEA's sort of costly membership fee and
acquired their not too cheap specs, what more would be gained by doing
that?

Those sites contain only a part of the existing NMEA sentences and are
pre-V3.0. So if you can live with this info, no problem. But if you want to
develop software that gets the most out of modern equipment, it would be
wise the have the latest version available. For instance, on the sites you
mention, none of the descriptions of the GPRMC sentence show you the mode
indicator field which tells you if the fix is valid or not.

The standard expands as new equipment comes on the market. A nice example is
AIS. This required the definition of a whole new set of sentences, covered
from V3.0 and upwards.

Do you have to be a NMEA member to use the standard in firmware? Or
software?

No. Anyone can buy the standard from NMEA. But members get a discount.

Meindert

You are right some are outdated.

Gerard

"Meindert Sprang" schreef in bericht
...
"Gerard van Toornenberg." wrote in message
...
Take a look at http://vancouver-webpages.com/peter/nmeafaq.txt

That info is pretty old. More like NMEA-0183 V2 or so. V3.1 has a lot of
sentences with extra/new fields added.

Meindert

In the very begin used the only available multiplexer from Noland but
succesfully alread for years the USB Miniplex from www.Shipmodu.nll which
wil be replaced one of these days for a Bluetooth Miniplex.
Have you already visit www.raymarine.com For me the brand new multiplexer is
from Shipmodul.

Gerard

"Larry W4CSC" schreef in bericht
...
"Meindert Sprang" wrote in
:

No. Data from more than one talker can only be combined using an NMEA
multiplexer.

Meindert



Any particular BRAND of NMEA multiplexer come to mind?.....(c;

"Meindert Sprang" wrote in message
...
"Pascal Goncalves" wrote in message
om...
Anibody can tell me the diferences betwen V3.1 and V2.0? Or better,
who have the NMEA 183 specs can send me a copy?

The NMEA specs are copyrighted material and can only be obtained, at a
cost,
from www.nmea.org.

I read somewhere that
the V 3.1 alows for more than one talker: this is true?

No. Data from more than one talker can only be combined using an NMEA
multiplexer.

Meindert



Hi,
Meindert is right, a multiplexer is necessary to combine talkers.
However, with the various versions of NMEA sentences and the resulting
compatibility problems, it is advantageous to purchase an "intelligent"
multiplexer, one that allows you to do NMEA conversions, insert extra fields
in a sentence, etc.
There is one such multiplexer on the market that allows you to convert
entire sentences "on the fly", e.g. to convert a GGA to a RMC sentence, or
to insert extra fields, to make your older equipment compatible with NMEA
3.01. It also allows you to suppress sentences that your software doesn't
need (filtering), change NMEA ID's and many more other functions. Of
course, the checksum is re-calculated and replaced after changes have been
made to the original sentence. All these functions are controlled by
user-definable directives in a script file and can be uploaded to the
multiplexer in a simple way.
The same multiplexer has a "data pacing" feature to slow down fast talkers,
such as some electronic compasses. It will also add extra safety to the
integrated system by switching automatically to a backup GPS when the
primary GPS stops outputting NMEA data. This happens more often than one
would think and usually at a time it is most inconvenient. So, this is
actually a multiplexer taken a few steps further.
All to good to be true? A Google search for "NMEA mux" will get you there.

Wout

"Meindert Sprang" wrote in message
...
"Larry W4CSC" wrote in message
...
"Meindert Sprang" wrote in
:

No. Data from more than one talker can only be combined using an NMEA
multiplexer.

Meindert



Any particular BRAND of NMEA multiplexer come to mind?.....(c;

Well, ShipModul, of course. Are there any others? :-)


Wishful thinking mate! :-)
Wout



Meindert

Thank You, I had forgoten that only with a NMEA multiplexor I can have
more than one talker. I have the folowing situation: my gps is
sending NMEA messages to my AH autopilot, and the gps is receiving
Depth (DBT) from an Navman depth sounder. Aditionaly, I have a laptop
witch is reciving NMEA from the gps, for real time ploting, using some
software. If I add a VHF/DSC radio, sending and receiving NMEA to/from
gps, what would hapen?

My gps is a Garmin Gpsmap276C, witch now (3.1) includes a very
interesting interface with VHF/DSC, that can show the position of all
boats nearby (if they are DSC/VHF ready), so that I will see the
positions of all boats in the map screen, this would be useful in a
flotilha cruising for example,or pheraps to see ships in the scren? I
think this is not dependent of the Mayday function, witch is suported
too, but shows diferent symbols, colors and alarms.

In this case I will have more than one talker?

Thanks

Pascal



"Gerard van Toornenberg." wrote in message ...
You are right some are outdated.

Gerard

"Meindert Sprang" schreef in bericht
...
"Gerard van Toornenberg." wrote in message
...
Take a look at http://vancouver-webpages.com/peter/nmeafaq.txt

That info is pretty old. More like NMEA-0183 V2 or so. V3.1 has a lot of
sentences with extra/new fields added.

Meindert

"Gerard van Toornenberg." wrote in
:

wil be replaced one of these days for a Bluetooth Miniplex.


Bluetooth needs more range. Lionheart has a Netgear wireless 802.11g LAN
up and running, awaiting the delivery of the LAN-enabled, WEP-PROTECTED,
marine instrumentation at maximum speeds to connect to it....(c;

No, you can't have the WEP passwords.....

I don't know which VHF/DSC radio you have, but all the ones I have
looked at only receive GPS data. ICOM, Uniden, West Marine only have a
GPS in lead. My Garmin drives four listeners, auto pilot, Pactor IIe,
Uniden VHF/DSC and computer with Nobeltec Navigation software. The
computer is the only device that can transfer data to the GPS.
krj


Pascal Goncalves wrote:

Thank You, I had forgoten that only with a NMEA multiplexor I can have
more than one talker. I have the folowing situation: my gps is
sending NMEA messages to my AH autopilot, and the gps is receiving
Depth (DBT) from an Navman depth sounder. Aditionaly, I have a laptop
witch is reciving NMEA from the gps, for real time ploting, using some
software. If I add a VHF/DSC radio, sending and receiving NMEA to/from
gps, what would hapen?

My gps is a Garmin Gpsmap276C, witch now (3.1) includes a very
interesting interface with VHF/DSC, that can show the position of all
boats nearby (if they are DSC/VHF ready), so that I will see the
positions of all boats in the map screen, this would be useful in a
flotilha cruising for example,or pheraps to see ships in the scren? I
think this is not dependent of the Mayday function, witch is suported
too, but shows diferent symbols, colors and alarms.

In this case I will have more than one talker?

Thanks

Pascal



"Gerard van Toornenberg." wrote in message ...

You are right some are outdated.

Gerard

"Meindert Sprang" schreef in bericht
...

"Gerard van Toornenberg." wrote in message
...

Take a look at http://vancouver-webpages.com/peter/nmeafaq.txt

That info is pretty old. More like NMEA-0183 V2 or so. V3.1 has a lot of
sentences with extra/new fields added.

Meindert

WEP's not very secure. You should be thinking LEAP at least.


"Larry W4CSC" wrote in message
...
"Gerard van Toornenberg." wrote in
:

wil be replaced one of these days for a Bluetooth Miniplex.


Bluetooth needs more range. Lionheart has a Netgear wireless 802.11g LAN
up and running, awaiting the delivery of the LAN-enabled, WEP-PROTECTED,
marine instrumentation at maximum speeds to connect to it....(c;

No, you can't have the WEP passwords.....

"Wout B" wrote in message
...

"Meindert Sprang" wrote in message
Well, ShipModul, of course. Are there any others? :-)


Wishful thinking mate! :-)

:-)))

Meindert

"Larry W4CSC" wrote in message
...
"Gerard van Toornenberg." wrote in
:

wil be replaced one of these days for a Bluetooth Miniplex.


Bluetooth needs more range. Lionheart has a Netgear wireless 802.11g LAN
up and running, awaiting the delivery of the LAN-enabled, WEP-PROTECTED,
marine instrumentation at maximum speeds to connect to it....(c;

Well, Bluetooth HAS good range, at least *we* use a Class 1 that can go up
to 100 meters. But the problem on the other end is that most PDA's and
computer dongles are class 2, reaching only 10 meters. And of course, there
is a reason for that: power. Turn on wifi on a PDA and your batteries are
dead after 2 hours. Bluetooth lasts much longer, it can go down to 1/100 of
the power consumption of a wifi interface.

Meindert

I know that the Icom M602 has both input and output.

Eric

"krj" wrote in message
...
I don't know which VHF/DSC radio you have, but all the ones I have looked
at only receive GPS data. ICOM, Uniden, West Marine only have a GPS in
lead.

The new Uniden UM625 and UM525 also have nmea output.

Eric

"krj" wrote in message
...
I don't know which VHF/DSC radio you have, but all the ones I have looked
at only receive GPS data. ICOM, Uniden, West Marine only have a GPS in
lead.

Ok, there are some VHF radios witch outputs NMEA. But what messages
are used? I know there is DSC and DSE, messages related to DSC since
NMEA version 2 . But my question was if I add NMEA IN/OUT from
VHF/DSC, and I alredy have the Depth Sounder sending NMEA to gps, the
Laptop sending and receiving to/from the gps, witch in turn sends NMEA
to autopilot and so on. How many talker I have? Would be a problem in
that case? With DSC in/out I am adding another unit sending NMEA to
the gps and, since I already have the Depth Sounder sending NMEA DBT
to the gps, this wil work?

I know that the GpsMap 3010 and GpsMap 276C both "theoricaly" have 2
NMEA ports, but at last in my one, witch is at the latest software
level (3.1) this does not work, because when I set one port to NMEA
the other is automatically set to NONE by the softwa so I can have
only one port using NMEA, the other can be Garmin mode, etc.. but not
NMEA. I think this could be a software problem, any coments? Maybe
anibody witch has a GpsMap 3010 or 3006 could tell me if this 2 port
can work "realy" in NMEA format?

In summary, anibody here is using VHF/DSC with the new Location NMEA
IN/OUT function? Anibody here has GpsMap 276C or GpsMap 3006/3010? Who
is using the 2 NMEA ports at same time?

Thanks

Pascal



"Eric Fairbank" wrote in message ...
The new Uniden UM625 and UM525 also have nmea output.

Eric

"krj" wrote in message
...
I don't know which VHF/DSC radio you have, but all the ones I have looked
at only receive GPS data. ICOM, Uniden, West Marine only have a GPS in
lead.

"Pascal Goncalves" wrote in message
om...
Ok, there are some VHF radios witch outputs NMEA. But what messages
are used? I know there is DSC and DSE, messages related to DSC since
NMEA version 2 . But my question was if I add NMEA IN/OUT from
VHF/DSC, and I alredy have the Depth Sounder sending NMEA to gps, the
Laptop sending and receiving to/from the gps, witch in turn sends NMEA
to autopilot and so on. How many talker I have?

Every device that SENDS data is a talker.

Would be a problem in
that case? With DSC in/out I am adding another unit sending NMEA to
the gps and, since I already have the Depth Sounder sending NMEA DBT
to the gps, this wil work?

You always need a multiplexer when you want to feed data from more than one
device into another. So you need one to feed the output from the VHF and the
depth sounder into the GPS.

Meindert

"Meindert Sprang" wrote in
:

You always need a multiplexer when you want to feed data from more
than one device into another. So you need one to feed the output from
the VHF and the depth sounder into the GPS.

Meindert



Meindert, quit smiling so brightly! It's lighting up the whole sky all the
way across the Atlantic!....(c;

"Larry W4CSC" wrote in message
...
"Meindert Sprang" wrote in
:

You always need a multiplexer when you want to feed data from more
than one device into another. So you need one to feed the output from
the VHF and the depth sounder into the GPS.

Meindert



Meindert, quit smiling so brightly! It's lighting up the whole sky all
the
way across the Atlantic!....(c;

Oh man, Larry, you just made it even brighter... :-)))

Makes me think of something my wife used to say: my future is so bright, I
have to wear shades.....

Meindert

"Meindert Sprang" wrote in
:

Oh man, Larry, you just made it even brighter... :-)))

Makes me think of something my wife used to say: my future is so
bright, I have to wear shades.....

Meindert


I'm just proud to actually MEET someone who's turning a PROFIT on marine
electronics....(c;