GitHub repository: rothn/P1P2Serial
Description: P1P2Serial library and P1P2Monitor program for low-level reading and writing Daikin/Rotex P1/P2 bus (based on Japanese Home Bus System), likely also for DIII-NET (F1/F2) bus, Mitsubishi M-Net bus, Toshiba TCC-Link, Hitachi H-link, Panasonic/Sanyo SIII-Net, Haier, York, ..