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My sailboat has a Simrad instrument set (speed, depth, wind) with NMEA output. a USB GPS, and a MPU 9250 compass and pitch roll both interfaced with OpenPlotter and outputting fine on the respective dashboards. I would like to input the compass data froo the MPU and the GPS data from the USB into the Simrad instrument NMEA using the Signal K software. it is all running on a R PI 3B. Is this possible and how would I go about doing it?
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I did produce a SD card version of OpenPlotter that does not have the I2C activated that does send GPS data to OpenPlotter but it does not transfer the GPS data to the Simrad instruments. However, my Simrad instruments do receive course to mark, distance to mark and cross track error when I plot a course with OpenPlotter, so Simrad is getting data as is my Raymarine autopilot.
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I am using Openplotter HDM data from Pypilot for my navigation and would like Signal K to transmit the data HDM to my Simrad NMEA 0183 instruments. What Signal K commands do I need to do this?
Openplotter readily accepts all of the Simrad data (wind, speed, depth, etc) but I have been unsuccessful in sending data back to the instruments.
The Simrad instruments are connected to a NMEA 0183 in/out converter.