OpenCPN Radar Overlay PlugIn

[RobbieW]

Originally Posted by Hakan

Robbie...
I've two main sources for my assertion; My own tests with the BR24 and the "reversed engineering" paper.
The paper you can find here: Roboat: Radar refered to in this post: http://www.cruisersforum.com/forums/...tml#post915730. See on page 6 paragraph 6.1.1 ...."Although the data stream uses just around 1 Mbit of net bandwith it is not suitable for standard WiFi (e.g. IEEE 802.11 b/g) because the way it is send out......."
My own tests using a IEEE 802.11 g confirmed this...

Thanks Håkan,
In theory 11n runs at just under 3x the speed of 11g but that article emphasises that theres more to it than just throughput. Some more research into broadcast and multicast technique seems in order. When I'm in a position to do so, I'll try some testing and post results in the BR24 thread. I'm now running my router in 11n mode only.

Using the technique outlined in the Garmin article I referred earlier, it should be possible to filter the radar traffic away from the wireless vlan in the router if necessary.

Cheers ... Robbie

[NahanniV]

Originally Posted by RobbieW

Hi Håkan,
Could you outline why wireless via a router is unsuitable for radar connections please. If thats to do with data volume, what sort of volume is being transmitted? I use a reasonably performant router onboard, Asus RT-N16, and wonder if that would work (I'm pretty sure I'll use the BR24 but as the posts are here...).

For anyone else looking into wired or wireless connections with Garmin equipment, I came across this article recently which may give some insight.

Cheers ... Robbie

I'm trying to figure out a wireless setup for my boat as well.
So, I'd be interested to know how the RT-N16 is working for you:
Are you running the standard firmware ? or something else ?
How are you powering it ?
What is the current consumption.

As far as OCPN RADAR over wireless, I am no expert, but it seems like UDPXY might do the trick, if you could run it on your router.
udpxy - Home

To make this work the RADAR plugin would need to be modified (configuration added) to allow it to connect to the UDPXY relay running in your router instead of binding to the multicast directly.

I could be completely out to lunch on this !

Cheers,
JM.

[RobbieW]

Originally Posted by NahanniV

I'm trying to figure out a wireless setup for my boat as well.
So, I'd be interested to know how the RT-N16 is working for you:
Are you running the standard firmware ? or something else ?
How are you powering it ?
What is the current consumption...

The RT-N16 works well for me, the choice was largely based on something that used 12v (I use a stabilised supply off the domestic system) and that had enough RAM to include OpenVPN in the firmware build. I use a shibby Tomato variant, tomato-K26USB-1.28.RT-MIPSR2-116-VPN at the moment. I have compiled muttnik's kPlex to run on the router providing GPS/AIS data on my network from the existing boat systems. I dont know exactly what the current draw is, the device is rated at 1 amp - its certainly no more. I've written some of this up here

[rgleason]

Radar over wifi ... with AIS etc.
Rick S (Lenovo Miix 8) uses Bluetooth to send Standard Horizon VHF/AIS to his Tablet. Currently it takes some extra programs to connect the Bluetooth, but this is a way to get that data onto a separate bandwidth.

We have an ASUS router RT-N65? It is quite good, with fast processor (dual I think) but it runs a little hot. Equipment could certainly be a part of the answer, but the other part is having clear unobstructed bandwith. If you are running an engine (with interference) or other equipment with RF or have other wifi going in that bandwidth, I think there will inevitably be trouble. It would be really nice to have wifi Radar, but there's lots to overcome!

[ChuckSK]

Originally Posted by rgleason

Radar over wifi ... with AIS etc.
It would be really nice to have wifi Radar, but there's lots to overcome!

GRadar works fine over wifi. Dell inspiron 1525 running Vista and an old Netgear WGR614.

Chuck

[rgleason]

So there's hope for a Tablet with Ais/GPS on Bluetooth and Radar on wifi?
What speed of wifi are you using? Does engine operation or other things cause interference? Thanks.

Later - I think we should probably have a separate Radar over wifi thread so as not to dilute this one?

[rgleason]

ChuckSK wifi is 802.11g up to 54 Mbps of wireless throughput
He's seen no interference in marina, has not been at sea with it.

[Baikal]

the world's first wireless Furuno Radar
costs about 2,000 euros
may try to add it to CPN?

FURUNO 1st Watch Wireless Radar

[secondcat]

Hi
I have a garmin gmr18xhd, trying to connect it to my windows 7 pc, and open cpn
network are set (and checked with timeshark), open cpn status window looks ok, but i have a status unknown, and no green light.

in this thread there was a plugin with a logger function, can anyone send that ?
have tried to different windows 7 pc, one xp. same result ?

br jesper

[secondcat]

Hallo Bdbcat or other who may help

I have just got a garmin xhd , and can not get the "green light" in open cpn

i have of cause tried all things about the network, tried 2 pc running w7, 1 pc running xp etc with same result

so i guess the Xhd are different from the "old" HD



running timeshark, (with automatic ip config) show that the radar are sending on 172.16.2.210 (sometimes .193)

and you can use a "jumper" or a "straight" cable with same result. So maybe the new radar are a bit more intelligent ? like the new switches

Anyway i would like to get it to work ?

if i use the radar plugin with ext debug, it shows

"The big while, timeout 5sec"

and repeat that about 20 times / sec ?

Hope you can help me.

if you want i can send any logfile from timeshark

br
jesper

[secondcat]

2 update of XHD problem

I have atch the radar to a garmin network plotter (garmin 720), and i had to update software in the plotter before it worked with the xhd. before update the plotter could not see the radar ( same problem i have with open cpn)

So i guess it is 98% sure, that open cpn can't work with the new XHD radars.

(i can supply any logfile if needed)

jesper

[bdbcat]

jesper....

Send us some logfiles, network captures, whatever you have. We can take a look. Maybe simple....

Thanks
Dave

[secondcat]

Hi

here are two files logged from timeshark

i'm installing the radar at the moment, so within 1 week, i can make more if you want

btw i tested it with the garmin plotter, and the XHD are improved compared to the HD. The overlay are nice and clean (on the plotter), very little noice.

br jesper

?? atch are gone
i have put them here (Will unzip to xhd.pcapng, and test)

www.dynomet.dk/radar.zip

[secondcat]

hi

here are some files (rename to zip)

radar.zip atch as pdf

jesper

[CapSud]

Hi reader, I am in need of some quick help here.

I am a OpenCPN user for years now (love it, donated and donated to the gradar project) so i downloaded the Gradar plugin. I have read everything i could about and decided to buy a Garmin GMR18

Today I connected the power on it then the data cable, then into my laptop before boot and then open opencpn but i still get

0: Found network interface: 192.168.1.66/24
1: Found network interface: 127.0.0.1/8
2: Scanner at 172.16.2.0 is <<NOT>> accessible for master control.
3: Successfully added to multicast group 239.254.2.0
4: UpdateState: PluginState [S] Searching (1) Scanner state: Unknown (0)
5: True Heading: 0 Mag Heading: -1.#IND Variation: -1.#IND thpri: 99 mhpri: 99 vpri: 99

same message that appears when there is no antenna at all.. If anyone can help, i need to fix before my departure to azores in 2 weeks... we are june 20th 2014.

p.s. do i really need the amphenol mrj-5780 or can a direct connection into pc work?

please answer to my email chweedel at g mail dot com

Thanks