http://code.mios.com/trac/mios_rfxcom/browser

Almost looks like this type type of part-rubber box that can be mounted without tearing down the wall:

https://www.eldirekt.se/elmaterial/elinstallation/infallda-dosor/multidosa-big-box

Gylec Multidosa – 00:35
— Gycom

Gateways always get node-id 0.

Doesn't seem to use the MySensors library.

Great weekend and event! Thank you all for participating! A special thanks goes to @Yveaux for arranging the awesome dollhouse-experience.