This is an Arduino library that makes it easy to write sketches that talk to DCS-BIOS.
For more information and documentation, see the DCS-BIOS FlightPanels Project.
DCS-BIOS was originally developed here, DCS-BIOS project. DCS-BIOS Flightpanels forked all of DCS-BIOS in order to initially provide support for Saitek Flight Panels. As of Nov, 2020, the original project has received limited support (despite a major update for HUB), and FlightPanels is gaining in popularity due to it's support.
This is a community maintained plugin. Support is best found at the DCS-Flightpanels discord channel.