Described are methods, recording media, and devices for configuring a home-automation installation comprising at least one first part of the home-automation installation and one second part of the home-automation installation and one configuration device.The first part of the home-automation installation comprises elements including a remote control unit and equipment controlled by the remote control unit, communicating over a first home-automation network, the first part having a first key, and the second part of the home-automation installation comprises elements including a remote control unit and equipment controlled by the remote control unit, communicating over a second home-automation network, the second part having a second key.