Plugin: DashBoard

[Alicja]

Originally Posted by wholybee

Speed through water and Speed over ground are different values with different meanings. By definition, log is distance through the water. While a GPS can display or calculate the speed over ground or distance over ground traveled, but it cannot generate a log or sum log.

Of course speed/distance over ground and over water are two different things. I mean GPS distance = over ground, from the beginning. The same as GPS-speed is over ground. In newer yachts you don't even have the traditional, mechanical log (the device) that counts speed/distance over water...

[bcn]

That's exactly what the odometer plug-in does.


The other option is Nohal's one: enable "track" and with mouse over you will have the the accumumated distance at this point. Plus the hour when you passed there.

[Alicja]

Originally Posted by bcn

That's exactly what the odometer plug-in does.

I've installed it, but see no options to be configured. This means it simply starts working when I start moving and needs no configuration?

[Hakan]

Info:
https://www.opencpn.org/OpenCPN/plug...sodometer.html


and manual:
https://opencpn-manuals.github.io/ma...ter/index.html

[stevead]

You mean that openCPN cannot work separately on the boat, as the only chartplotter (without another chartplotter)?

I didn't say nor infer that. OpenCPN functions perfectly well as the only chartplotter on board.

It translates GPS data and put them to the Dashboard, or is a separate plugin in a separate window?[

GPS Odometer is a separate plugin with its own UI and options for resetting the trip log. Others and myself have provided links to the GPS Odometer manual.

I don't imagine any chartplotter generates the log and sum log data, either 2000 or 0183. By definition, the data is through water, and AFAIK all speed though water knot meters will generate it as part of their function.

Incorrect. Most speed logs have no mechanism to measure time so they are incapable of calculating the distance travelled. For example if you refer to the manual for the speed log that is installed on my vessel, a Garmin GST 43, you will note that it does not generate PGN 128275.

As I stated before, some chartplotters and instrument displays do calculate sum and trip logs and others do not. Those that do may be configured to use distance travelled through water (obtained from a speed log) or distance travelled over ground (from GPS position data).

OpenCPN, on its own does not calculate sum and trip logs. The Dashboard only displays sum and trip log data for distances travelled through the water from data generated by other devices.

On the other hand the GPS Odometer plugin does calculate and display sum and trip logs derived from GPS Poosition data.

Note for Lennart (developer for GPS Odometer), perhaps add a "PushNMEASentence" API call with a generated VLW sentence, so that the Dashboard plugin may consume trip and um log data from your plugin ?

[wholybee]

Originally Posted by stevead

I didn't say nor infer that. OpenCPN functions perfectly well as the only chartplotter on board.

GPS Odometer is a separate plugin with its own UI and options for resetting the trip log. Others and myself have provided links to the GPS Odometer manual.

Incorrect. Most speed logs have no mechanism to measure time so they are incapable of calculating the distance travelled. For example if you refer to the manual for the speed log that is installed on my vessel, a Garmin GST 43, you will note that it does not generate PGN 128275.

As I stated before, some chartplotters and instrument displays do calculate sum and trip logs and others do not. Those that do may be configured to use distance travelled through water (obtained from a speed log) or distance travelled over ground (from GPS position data).

OpenCPN, on its own does not calculate sum and trip logs. The Dashboard only displays sum and trip log data for distances travelled through the water from data generated by other devices.

On the other hand the GPS Odometer plugin does calculate and display sum and trip logs derived from GPS Poosition data.

Note for Lennart (developer for GPS Odometer), perhaps add a "PushNMEASentence" API call with a generated VLW sentence, so that the Dashboard plugin may consume trip and um log data from your plugin ?

This is quite interesting that a garmin speed log doesn't generate a PGN for distance log. My raymarine i50 does. It did it and displayed it when it was the only instrument on the boat. Distance traveled doesn't need to know the time. The log measures it directly (IE, every tick from the paddle wheel = a small distance. Just add them up)

[Alicja]

Thank you everybody! The Odometer plugin is OK and it does exactly what I wanted!