I have to admit, this work has been 90% google and 10% coding - there are already libraries for Arduino on the net that can transmit BBSB/Domia's radio protocol.
This project will re-transmit the 433.92mhz Domia/BBSB signals emitted by the BBSB Online controller v2 on your local network.
Build instructions are here, along with source code Arduino sketch here. See pdf for further details.
If you have comments or questions please post to the BBSB Forum here.
Further enhancements are in the works, stay tuned for the next part - a two-way repeater.
15/06/09: Updated to fix a bug already! - Device code support 1-16 (in theory , but untested)