Plugin Polar

[rgleason]

I dont believe so, though I've never used signalk. Opencpn supports signalk does it not? Vdr simply reads the nmea0183 data stream.

If I mislead. Sorry.

Can signalk into opencpn be directed to the nmea0183 data stream?

[pneumokogge]

Hello


i recently installed the paid version of opencpn on my galaxy tab to create a polardiagram for my ship, but polar_pi is not available in the pluginmanager.


How can i use polar_pi on android, can i?


regards

[stevead]

Going back to NMEA 0183 would require additional hardware

No. Configure the SignalK to NMEA 183 plugin to transmit NMEA 183 data over a network connection, either TCP or UDP. You are already using a network connection to receive the SignalK data so no additional H/W is required.

Opencpn supports signalk does it not? Vdr simply reads the nmea0183 data stream

Rick,
The two are quite separate. SignalK data is encoded as JSON, something similar to:

navigation": {
        "position": {
          "value": {
            "altitude": 0.0,
            "latitude": 37.81479,
            "longitude": -122.44880152
          }

whereas NMEA 183 as you know is a structured text format, for example:

$GPGLL,3811.00,S,14430.00,E,223015.00,A,A*7A

For a plugin to support SignalK, it needs to support the OpenCPN Plugin Messaging system and parse the JSON messages.

SetPluginMessage(wxString& message_id, wxString& message_body) {
	if (message_id == _T("OCPN_CORE_SIGNALK")
        ....

whereas to receive NMEA 183 data, the plugin implements

SetNMEASentence(wxString &sentence)...

It would appear that the Polar Plugin has yet to support SignalK, hence the suggestion to use the SignalK to NMEA 183 plugin to enable the SignalK Server to convert SignalK data to NMEA 183 for consumption by OpenCPN and its plugins.

[rgleason]

Stevead. Thanks for correcting me and your clear explanation. Perhaps we should add some similar doc to signalk in the manual?

[rgleason]

Also, what is the overhead for a.pi to support signalk?

There are probably also additional room for errors bugs and other annoyances.

[stevead]

Hi Rick,

I can't comment on a Pi's performance running SignalK. There are various models of Pi's so performance is dependent on whether a user runs a Pi Model 1 (512Mb RAM, 700 MHz Arm 11 CPU), 2, 3 or 4 (1-8Gb RAM, 1.5 GHz, 4 core Arm v8 CPU) .

Also similar to OpenCPN and its plugins, SignalK also has a number of plugins that enable it to connect to NMEA 183, NMEA 2000 or sensors that connect to the Pi using GPIO. Also performance would be impacted by the data rate of the attached sensors and their processing overhead,

That could vary from say a NMEA 2000 GPS emitting data at a rate of 10Hz or an Attitude sensor emitting data at a rate of 50Hz.

Re documentation, it is documented in the OpenCPN Manuals although in my opinion I think it could be made a little easier. Alternatively leave it to the SignalK authors to document how to connect to OpenCPN.

What is lacking and may be useful is a simple table listing plugin such as Dashboard, Tactics, Engine Dashboard, GPS Odometer, VDR, Polars etc. and what type of inputs they support; Eg. NMEA 183, SignalK.

Perhaps extend even further with a listing of the required NMEA 183 sentences or SignalK value pairs.

[rgleason]

Stevead I think your idea for a table is good. Perhaps we should start with a list of plugins that do support signalK and then augment that with ones that support the other communications.

[Amerona]

Any one know the minimum NMEA strings to get polar data?
I have MWV, VHW and HDT but that is not enough.
What more do i need?
/ Reidar

[mueyu]

Hi,

I posted this as an issue in Github a few days ago. So I'll try here:

Plugin version 1.2.2.0 not working on Mac

OpenCPN 5.8.0-0 from official site. MacOS Ventura 13.3.1 (22E261) on M2 MacBook Air. Plugin is installed and enabled, but the button/icon does not appear in the Toolbar.

Anyone have it working on Mac? Is Mac unsupported with this plugin?

Thanks,
Dave

[rgleason]

Originally Posted by mueyu

Hi,

I posted this as an issue in Github a few days ago. So I'll try here:

Plugin version 1.2.2.0 not working on Mac

OpenCPN 5.8.0-0 from official site. MacOS Ventura 13.3.1 (22E261) on M2 MacBook Air. Plugin is installed and enabled, but the button/icon does not appear in the Toolbar.

Anyone have it working on Mac? Is Mac unsupported with this plugin?

Thanks,
Dave

The tarballs exist for darwin macos, see
https://cloudsmith.io/~opencpn/repos...darwin+tarball

The plugin also is in the master catalog and I am able to updated the catalog and install and enable v1.2.2.0 in Windows using O5.8. I believe the MacOS plugin exists and works.

[nohal]

Except some z-order issue (for which I will send a PR during the weekend) the 1.2.2.0 version seems to be working on macOS.
But my system is Monterey on Intel, so I can't completely deny that it does not work for mueyu...

[nohal]

mueyu...
While fixing the other problems this plugin had today I found out that there are situations when it simply does not create the toolbar icon. Nothing to do with macOS, it was broken everywhere. Fix sent upstream with the others.

[rgleason]

Polar v1.2.3 has been updated and is in Catalog "master"

Please test

Also autopilot_route v0.4.12 will soon be there to test.
Using TP 1.0.127


Does it work with MacOS?

[Save Our Souls]

Is Polar available in O582 under Flatpak? Cannot see in the plugin manager

[BigAl.NZ]

I have crossed the pacific and made polars for my boat. The issue is that when the boat surfs down waves you get these unrealistic "peak" speeds - which are never maintainable.

Is there a fix for this?