This project describing how to connect PC to Rego 600 heatpump controller (used in heatpumps IVT, Carrier, Bosch, AutoTherm, ...). This project describe hardware and also software part of interface.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.