I have a Raspberry Pi running Open Plotter and Signal K connected to my NMEA 2000 network. I also have an Autonnic Wind Instrument that is connected. However, I had to install this off-centre, so I need to reset the unit’s heading to account for this.

According to the instructions, I can reset the heading to 0 with the following:

Input PGNs
Custom (PGN: 127257). A 6-byte block of which only the first is used as follows:
Set Wind Heading to Zero = 7

Does anyone know how to do this using a Pi, SignalK or any other method?