ebus
http://www.mikrocontroller.net/topic/218643
http://ebus.webhop.org/
http://www.mikrocontroller.net/topic/91164
https://www.symcon.de/wiki/EBus_Adapter
https://www.symcon.de/forum/threads/10799-eBus-Adapter-Senden-Empfangen?p=119974#post119974
See also:
Vaillant
and
Vaillant serial