This forum uses cookies
This forum makes use of cookies to store your login information if you are registered, and your last visit if you are not. Cookies are small text documents stored on your computer; the cookies set by this forum can only be used on this website and pose no security risk. Cookies on this forum also track the specific topics you have read and when you last read them. Please confirm whether you accept or reject these cookies being set.

A cookie will be stored in your browser regardless of choice to prevent you being asked this question again. You will be able to change your cookie settings at any time using the link in the footer.

Welcome, Guest
You have to register before you can post on our site.



Search Forums

(Advanced Search)

Forum Statistics
» Members: 4,044
» Latest member: janrkabil02
» Forum threads: 1,677
» Forum posts: 11,756

Full Statistics

Online Users
There are currently 164 online users.
» 1 Member(s) | 160 Guest(s)
Applebot, Bing, Google, AliceJ21

Latest Threads
opencpn-hat-? nema prefix...
Forum: Bug Reports
Last Post: Norm
7 hours ago
» Replies: 0
» Views: 3
Waypoint Arrival Confirma...
Forum: Feature Requests
Last Post: ironman
10 hours ago
» Replies: 5
» Views: 27
Output data to N2k Displa...
Forum: How do I...?
Last Post: tkurki
Yesterday, 05:34 PM
» Replies: 3
» Views: 28
Increase Grafana graph re...
Forum: How do I...?
Last Post: tkurki
Yesterday, 05:16 PM
» Replies: 3
» Views: 126
Server Hardware for openp...
Forum: General discussion
Last Post: Max1947
Yesterday, 02:47 PM
» Replies: 141
» Views: 1,037
OpenPlotter para no inici...
Forum: Español
Last Post: secuaz
Yesterday, 01:49 PM
» Replies: 194
» Views: 15,971
NR Embedded - Worldmap 40...
Forum: Node Red
Last Post:
Yesterday, 07:47 AM
» Replies: 0
» Views: 6
Hardware Acceleration for...
Forum: Feature Requests
Last Post: McNugget
Yesterday, 02:45 AM
» Replies: 12
» Views: 56
Chromium Update
Forum: General discussion
Last Post: Lazzz
Yesterday, 02:17 AM
» Replies: 0
» Views: 6
Forum: General discussion
Last Post: fran674
02-27-2020, 07:00 PM
» Replies: 4
» Views: 15

  Filtering NMEA on an individual SignalK connection
Posted by: abarrow - 02-25-2020, 11:15 PM - Forum: How do I...? - Replies (2)

Okay, on a cruise using OpenPlotter 2.0. I have a problem with one of my connected NMEA feeds providing bad magnetic heading information. With kplex, I was able to filter just that incoming stream and just that particular NMEA string. Now, I can't seem to find a way to do it without kluging up a kplex instance.

How do I do this with using SignalK?

  Need a solution for a upcoming voyage
Posted by: NorthernMac - 02-25-2020, 09:18 PM - Forum: General discussion - No Replies

Hey guys,

 New here and have a question

 I'm setting up a opencpn system and I need a autopilot for a below decks install on a 30' cutter

 The boat goes up and down the east coast of the US every 6mo, single handed with about 200W of solar and two group 31 batteries 

 I WAS going to use pypilot, and use a tiller arm mounted on the rudder shaft

 Plan was Pelegic, but their arm apparently needs up to 25 amps, and that doesnt seem to work with pypilot

 Any solutions, or is this pypilot just for very small boats?

Here is a picture of where I would be mounting the system, boat hook was just for size reference


[Image: ApArea.jpg]

  [Solved] SignalK - err_connection_refused
Posted by: Ranur - 02-25-2020, 09:57 AM - Forum: Bug Reports - Replies (2)

Had a MAJOR issue yesterday where Sailoog helped me out. After experimenting with pypilot and NMEA 0183, I took my RPI home for further test on other stuff. As I HADN*T turned OFF Autopilot in the Pypilot module setting, it kept creating error messages for IMU and NMEA 0183 data. A lot of them - in the northward end of 20GB. In addition, this little joker:
 "# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
had multiplied itself into my .profile file, so when I logged on - my Pi accepted my pw ----- and returned to ask me for my pw....

With all that resolved I bang my head into the the next problem- Signal K. When I try to open it I get err_connection_refused after a loooong time. I have now disabled and removed all NMEA 0183 stuff, shut down pypilot, and ensured through system check that Signal K is in fact running. 

So now I need y'alls help to get on. Where do I go now? based on this: I suspect it has to do with my previous NMEA 0183 ventures...


Edit: Made some progress, but now I'm really in over my head

  UK OpenPlotter Build
Posted by: northwind - 02-24-2020, 12:32 PM - Forum: How I did it - Replies (5)

I am in the process of changing boats, moving from a larger lift keel yacht to a trailer sailer. The new boat is bare, which has given me the opportunity to start the electronics from scratch.

I have finally finished my first build of the my Openplotter computer, I say first build as I would like to build a custom PCB for the interfaces to the Pi, but I wanted to get everything together in one box and tested before I finalise my PCB design.

The case I am using is one by Western digital, they made a few add ons for Raspberry Pi for about a year, and I brought up a few bits when they finished their pi range.

I decided that I would fix on a form factor and work to make everything fit within it, so I removed the case from the DVB stick and wired it into a usb cable to save space.

The board in the top left is an opensource seatalk to NMEA board, running a PIC processor.

The two OLED displays were kicking around and I thought would add a nice feature of having some status info onboard, there is also a nice feature of the case that allows them to be seen through the cover:


The displays are driven from Node-red, more work on this side of things is due, so I can use the reset button to change what they show, and also reboot the Pi.

I am waiting on a number of bits from China to enable me to carry on with the next stage of the build, this includes custom PCBs for the autohelm remote and for relay control and buttons.

display wise, I have a couple of options, one is the 7" raspberry pi display, which I will mount separately to the case. I also have an old laptop display which is obviously a bit bigger!

I will update this thread as I build more of the components.

  [CLOSED] OP2 Serial Alias warning on Check System screen
Posted by: paul42 - 02-24-2020, 10:03 AM - Forum: Bug Reports - Replies (6)

RPi4B 4GB - OP2 2.0.27-stable Serial 2.0.5-stable Cpn 5.0.0 all others up-to-date

I gave Alias names in the serial app. For the ttyACM0 which links to Signal K no problem.

Cpn doesn't see the Alias USB0 from the serial app & creates it's own connection.

This results in a warning message that the Alias is not set. There is no way to correct this that I can find.

Screenshots attached.

Not an issue as such as all works fine, just be nice to clear the warning.

Thanks, Paul


  i2c without Mointessier hat
Posted by: carlos-palma - 02-24-2020, 07:08 AM - Forum: General discussion - Replies (4)

Hi all,

Thanks for the effort with this excellent app.
My problem is how to read  pressure and temperature from my imu to put the data in signal k. Actually I get heading, heel and pitch from pypilot, but as data for pressure and temperature is not used by pypilot, is not read and is not send to signal k. 
I have the app i2c but when executed nothing happens, nothing opens.
All the rest, ais and gps are serial and work OK.

Thanks and regards,

  Seatalk, NMEA0183, N2K E Openplotter
Posted by: niklun - 02-24-2020, 03:58 AM - Forum: How do I...? - Replies (6)

Good morning, I have RPI4 with HAT2 and OpenPlotter V.2. Everything run. Now I would like to connect the various Raymarine type board, plotter Garmin, VHF, automatic pilot etc .. Protocols are SeaTalk, NMEA 0183 and NK2. They are several months that I am looking for and I'm not yet, but I still have not been able to find the solution. I do not find wiring schemes or clear information about it. Please if you can help me. In practice, what should I do now? Thank you.

  Updates repeating
Posted by: abarrow - 02-23-2020, 04:39 PM - Forum: Bug Reports - Replies (3)

Is anyone else seeing the latest batch of OpenPlotter updates coming up over and over? I did the updates, and they are there, but the same updates come up next time I do apt get update.

Sent from my CLT-L04 using Tapatalk

  [Closed] Crashed SD?
Posted by: Ranur - 02-23-2020, 02:11 PM - Forum: General discussion - No Replies

Hi all - need to check before going into Pi Surgery... I got an error message that the desktop couldn't be shown by VNC on my OP on RPI 3 today. It logged onto the internal OP SSID, so I took it home to hook it up to a screen. It boots - I see the multicolor RPI splash and the restore splash - then it turns black with a blinking cmd prompt. Now what? Restore? Pray?More Rum?

EDIT: Well, some of the symptom's were there, but still not. Eventually got errors relating to Xauthorize files and denial of access. Sailoog helped me out and we traced the problem to two MASSIVE logfiles of 11 GB each. Got those out of the way, and now everything is sweet and dandy

  Moitessier 2 HAT showing as not attached
Posted by: lindseygill - 02-23-2020, 12:41 PM - Forum: General discussion - Replies (4)

Hi there, I'm new to this and on a steep learning curve but I'm keen to get it working on my boat.

I installed "2020-01-13-OpenPlotter-Moitessier-HAT-v2.0-pre-release-NOOBS" onto an new Raspberry PI 4 4GB with on a 64GB card. 

I went into Open Plotter -> Moitessier HAT -> Drivers and updated the driver to the latest driver, which shows green against my kernel version.


Then I powered down, connected the HAT and then powered back up. Going back into the Moitessier HAT setup I ran the Check System and it shows the HAT not attached as does the Check System run from the toolbar.



I'm a little confused as some functions of the HAT seem to be working. When I move it around the values for Magnetic Heading, Pitch and Heel seem to change in a way linked to the movement and the Barometric Pressure is changing - it's fallen from 1032 to 1030 over the last couple of hours which is in line with the pressure I am expecting to see (per XCWeather).


So on the one hand it's saying it's not connected but on the other some parts of it are working and it has green lights flashing, so clearly it is connected.

If anybody has any suggestions where I should go from here I'd be most grateful.

Thanks very much.