Polar diagram record from boat's data - Printable Version +- OpenMarine (https://forum.openmarine.net) +-- Forum: OpenPlotter (https://forum.openmarine.net/forumdisplay.php?fid=1) +--- Forum: How do I...? (https://forum.openmarine.net/forumdisplay.php?fid=3) +--- Thread: Polar diagram record from boat's data (/showthread.php?tid=3473) |
Polar diagram record from boat's data - olewsaa - 2021-06-01 My RPi4 run openPlotter and OpenCPN which is connected to the instruments, AIS etc via Raymarine NG/NMEA2000/CANbus network. I use an optically isolated CANable module which works great with SignalK. I get all available parameters into SignalK which can be displayed on the instrument panel web application or a subset on the OpenCPN dashboard. So far it works like expected. So far so good. Next step is trickier. I tried to obtain Polar diagram with the OpenCPN plugin by using NMEA messages from the SignalK to NMEA183 plugin. While I see a lot of NMEA183 messges in the NMEA debug window on OpenCPN The NMEA sentences that are available as NMEA data are nicely recorded by the OpenCPN VDR plugin. From the OpenCPN NMEA183 log window I get the $GPRMC and $GPGGA (GPS data, should give speed o. ground SOG) and $IIMWV, $IIVWR (wind data). Speed should be calculated from GPS, $VHW is missing. Is there any simple solution to this ? Getting the SignalK to NMEA183 to generate sentences with boat speed (water/ground), wind (speed and angle).Or any other far simpler solution which I have not yet spotted . Regards, Ole |