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Another Garmin 44dv and VHF Radio NMEA0183 Question

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Another Garmin 44dv and VHF Radio NMEA0183 Question

Old 07-03-2016, 05:46 PM
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Default Another Garmin 44dv and VHF Radio NMEA0183 Question

Hopefully anyone who reads this post can make sense of what I am about to post.


I Connected the West Marine VHF 585 to the Garmin 44dv and on the radio the GPS display is blank and I have no GPS verification.

I tried to follow the West Marine instructions, but Step 3 said to connect the BROWN wire to the GPS DATA OUTPUT (-). But the Garmin 44dv instructions has the RX (receive) port as a (+). So I assumed from what I had read you have to connect RX(+) to TX(+) and TX(+) to RX(+).

Here is where I read that....


https://www.boemarine.com/blogs/news...erfacing-guide

Here are the instructions from the West Marine radio.


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Here are the Garmin instructions....


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So when I follow the practice of connecting + with + and - with - I connected the GPS TX (+) to the yellow wire and the GPS RX (+) to the white wire.

And lastly when I followed the West Marine instructions I connected the green wire to the same ground port with the GPS. I removed that green wire/ground to see if it would change anything and it did not.

Is there something that I am missing or not understanding?

Are there special connectors that need to be used other than 22ga butt connectors?
Old 07-03-2016, 06:05 PM
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TX is transmit or output. RX is receive or input. Positives to positives. Negatives to negatives. Very simple
Ed
Old 07-03-2016, 06:11 PM
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You don't need special connectors, butt connectors are fine.

You need to connect your radio green to the Garmin ground
and your radio yellow to the Garmin blue

BUT you may also have to go into the menu of the Garmin: Settings > Communication

and change some settings

Garmin often has a default of "Garmin Std" which needs to be changed to "NMEA Std"

or you may have to select to "enable" the NMEA 0183 "port"

you may have to select the specific NMEA "sentence" to be transmitted

(I believe GPGLL)

Last edited by Fwpratt; 07-04-2016 at 06:52 AM. Reason: sp
Old 07-04-2016, 06:22 AM
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Thanks for the replies!

Originally Posted by Edstillfishing View Post
TX is transmit or output. RX is receive or input. Positives to positives. Negatives to negatives. Very simple
Ed
That's what I thought as well. Hopefully this is a settings issues and not a wiring issue.



Originally Posted by Fwpratt View Post
You don't need special connectors, butt connectors are fine.

You need to connect your radio green to the Garmin ground
and your radio yellow to the Garmin blue


BUT you may also have to go into the menu of the Garmin: Settings > Communication

and change some settings

Garmin often has a default of "Garmin Std" which needs to be changed to "NMEA Std"

or you may have to select to "enable" the NMEA 0183 "port"

you may have to select the specific NMEA "sentences" to be transmitted

(I believe GPGGA and GPGLL)
I do have the radio yellow connected to the Garmin blue, but I am not 100% certain about connecting the radio's green wire to the Garmin's ground.

This is what I am using for power distribution, keep in mind this is just a small 16 footer with a small center console.

http://www.westmarine.com/buy/blue-s...09_275_002_501

The initial way I grounded them together was with ring terminals to the same ground post. Is this adequate? Or should I have them together in the same ring terminal?

Thank you again for all the help and GREAT information!
Old 07-04-2016, 06:25 AM
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For advice on interconnection of devices using NMEA-0183 see

http://continuouswave.com/forum/viewtopic.php?f=9&t=816

The two devices you want to interconnect are listed there. Simple instructions are provided for interconnection.

For the WEST MARINE radio see

http://continuouswave.com/forum/view...=9&t=816#p5411


For the GARMIN chart plotter see

http://continuouswave.com/forum/view...=9&t=816#p5350
Old 07-04-2016, 06:58 AM
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Originally Posted by NoWake200 View Post
I do have the radio yellow connected to the Garmin blue, but I am not 100% certain about connecting the radio's green wire to the Garmin's ground.

The initial way I grounded them together was with ring terminals to the same ground post. Is this adequate?
That is fine.
Very likely that it is now just getting the needed Garmin "Communication" setting.
enable NMEA 0183 port as NMEA Std
and under Settings>Communication>NMEA 0183>System enable output of sentence GPGLL
Old 07-04-2016, 07:26 AM
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Two weeks straight of working on this little (new to us) used boat has my brain scrambled, sometimes I don't know if I am coming or going and this has site and thread has been very helpful. Thanks again!
Old 07-04-2016, 07:53 AM
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Originally Posted by Edstillfishing View Post
TX is transmit or output. RX is receive or input. Positives to positives. Negatives to negatives. Very simple
Ed
Originally Posted by Fwpratt View Post
That is fine.
Very likely that it is now just getting the needed Garmin "Communication" setting.
enable NMEA 0183 port as NMEA Std
and under Settings>Communication>NMEA 0183>System enable output of sentence GPGLL

GPGLL was already selected.

When I selected "Serial Port:" 'NME Std.' the radio displayed GPS information. And when I selected NMA High Speed it started flashing again.

So, as of right now they are talking to one another.

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