Experimental KSPSerialIO client implement display of parameters, some simple controls, and some autopilot modes.
Read everything at the following website first, or you'll have no idea what's going on. You can also get the plugin etc. there: https://forum.kerbalspaceprogram.com/index.php?/topic/60281-hardware-plugin-arduino-based-physical-display-serial-port-io-tutorial-10-06-17/