Can I use heading data from IMU through NMEA?

[Tigress]

Hello, and congratulations on some fine work with OpenPlotter. Question I have is regarding the use of the heading data generated through the IMU sensor. I can see from the SignalK diagnostic that the sensor is working and OP is generating the correct data, but I am not sure how I can then send (with the correct NMEA183 sentences, e.g., HDT) this to the NMEA multiplexer such that I can forward to my other instruments and PC. Can I use the Autopilot example to do this? Not clear from the documentation, which says

Most autopilots have there own fluxgate compass and rudder angle sensor. These data can be used from OpenPlotter.

I, of course, want to use the built-in IMU and send this heading data to other instruments. 

Thanks in advance for your help!