Lollipop Interface

Lollipop Interface

Postby Jlr » Mon Nov 27, 2017 2:22 am

I have a new to me boat. The Navnet for my Furuno 1943C radar will not show waypoint information or the lollipop on the display. It is either a vx1 or vx2. The GPS is a Garmin 5212 and it is being fed to a Simrad AP 22 pilot. The Navnet does have a dedicated heading sensor. I want the waypoint info including the lollipop to show up on the Navnet, even though chosen from the Garmin and sent to the AP22. Any help would be greatly appreciated.
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Re: Lollipop Interface

Postby C-Bass » Mon Nov 27, 2017 5:59 am

Good morning JLR,

Thank you for your inquiry. Couple of questions, do you know what NMEA0183 data sentences the Garmin 5212 is outputting to the Furuno 1943? The Furuno will likely require "RMB", "WPL" in order for the Waypoint Lollipop to display correctly. The Waypoint Lollipop will only be displayed on the Radar Display, and the feature must be turned on once the correct data is confirmed on the 1943. To turn on the Waypoint Lollipop refer to the photo below.

Waypoint Lolipop.JPG


Please confirm what data sentences the Garmin 5212 is outputting. From there we can check the receive ports to verify the data is being sent.

Kind Regards,
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Re: Lollipop Interface

Postby Jlr » Mon Nov 27, 2017 3:02 pm

Will do. I also think I need to find out if the Navnet is looking for an external waypoint.
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Re: Lollipop Interface

Postby Jlr » Tue Nov 28, 2017 12:05 pm

Set it up for an external waypoint. Still no luck. I did verify that Port 2 is the port that is being used to receive data bat alas, it must be a VX1 because I do not think I have a port monitor. Or, can you help me find the port monitor if it is a VX2. Garmin is outputting at least rmbc and wpl sentences or something like that and many more. Thanks
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Re: Lollipop Interface

Postby Johnny Electron » Wed Nov 29, 2017 5:40 am

Have you setup the unit to accept external waypoint?


Capture.JPG
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Re: Lollipop Interface

Postby Jlr » Wed Nov 29, 2017 7:48 am

I have. But, I just found out that the prior owner may have been using my Northstar 952W to speak with the Navnet VX1 rather than the Garmin. I will need to trace that out. If so, can you give me the par number of the cable that would run from the Garmnin 5212 to the Navnet Vx1 in case I want to switch it to work that way. Either way, am I correct that the information to the Navnet is not (or cannot ) come from my Simrad AP20 autopilot but rather from one of the two of my GPS units? Thanks for the help.
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Re: Lollipop Interface

Postby C-Bass » Thu Nov 30, 2017 5:57 am

Good morning JLR,

Thank you for your follow up. If you want to use (2) different sources to create the waypoint lollipop on the NavNet then it might be best to use an A/B switch box. The switch box would allow you to move the toggle to position (A) which could be the Northstar unit, or position (B) the Garmin unit. You will need to contact Garmin to figure out what data cable you will need to interface to the switchbox. Then it would be just a matter of removing the Northstar to NavNet connection, take the Northstar cable to the switch box, take the Garmin cable to the switchbox, and take the Furuno cable to the switch box.

You might be able to get the information out of the Simrad pilot if it can output the RMB sentence?

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Re: Lollipop Interface

Postby Jlr » Sun Dec 03, 2017 2:07 am

Sorry. Still confused. I want to wire the Vx1 to receive either directly from the Garmin 5212 which is driving my AP20 pilot or to the J300x junction box output from the pilot. I guess my first question is basic. When I am feeding the output for the waypoint heading, distance , lollipop etc.from the Garmin or the J300x, am I still feeding this NMEA 0183 info into port 2 on the Vx1? If not, which port? Second, since I already have a cable connected to ports 1,2 and 3 on the Vx1, which do I need to connect to the output NMEA 183 wires from either the Garmin or the J300x and what are the colors from that wire already connected to the Vx1 port that I need to use the receive the waypoint, heading lollipop info. Thanks so much.
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Re: Lollipop Interface

Postby C-Bass » Mon Dec 04, 2017 5:39 am

I guess my first question is basic. When I am feeding the output for the waypoint heading, distance , lollipop etc.from the Garmin or the J300x, am I still feeding this NMEA 0183 info into port 2 on the Vx1? If not, which port?Yes, this will need to be connected to data port 2.

Second, since I already have a cable connected to ports 1,2 and 3 on the Vx1, which do I need to connect to the output NMEA 183 wires from either the Garmin or the J300x and what are the colors from that wire already connected to the Vx1 port that I need to use the receive the waypoint, heading lollipop info.Now I am a bit confused. In a previous post you said the Garmin is already connected to the Vx1 and that is on port 2? We don't know the Garmin wire colors for Transmit or Receive. On Port 2 with the Vx1 it should be a 6-pin cable. White and Black or TxA and TxB, Yellow and Green are RxA and RxB.

I am still a bit confused on what you are trying to accomplish. I understand interfacing the Garmin and the Vx1 so you can show the waypoint lollipop on the Vx1 radar display. But i am not sure why you want the J300X, which is a simrad j-box, to talk to the NavNet Vx1? My only guess would be for heading data from the simrad autopilot? But you mentioned below that the Vx1 has something wired into port 3 which is a dedicated port for heading? do you know what this cable is connected to?

It might be best to draw out a quick diagram and post it to this topic. Then we can get a better idea of the data distribution you are trying to create?

I apologize that I can't quite figure out what we need to do to get you going.

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Re: Lollipop Interface

Postby Jlr » Mon Dec 04, 2017 12:09 pm

Sorry for all the confusion. Spent hours today working on it to no avail. I simply want the lollipop on the Vx1. Since the Garmin is directing the Simrad, I thought it best to take the output from the Simrad box and send it to port two on the Navnet. Problem is, I need to be a very small person to trace the wires going in to each port on the Navnet. I just can't do that. As I said before, I don't care whether I get the lollipop from the Garmin or the Simrad box, it's the same information. If it helps, when I try in the Navnet setup to change the Nav source to all from just Furuno, I get an error. Sure which there was an easy answer to this.
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