Note: this is still work in progress. Library works with named pipes and can be connected to MSFS2020. New protocol features are missing. jSimConnect is a java implementation of a simconnect client ...
A JavaScripty wrapper around EvenAR's excellent node-simconnect with a simplified API. See test.js for the basics, which you can run (with MSFS open and sitting on the apron with a plane =) using npm ...