The wall switch module is installed behind the existing light switch and makes it smart-enabled without replacing the switch itself. It acts as an interface between the physical switch and the Hue Bridge by converting the switching commands of the original switch into smart commands.

How it works in detail:
- Installation: The module is installed in the flush-mounted box behind the light switch. The power supply to the lamp is switched to continuous current (e.g. with a Wago terminal) so that Hue lights are constantly supplied with power.
- Switch control: The original switch remains active, but no longer sends a power interruption to the lamp. Instead, the module recognises the switching operations and transmits them as a signal to the Hue Bridge.
- Scene control: Up to three light scenes can be configured per switch via the Hue app. These scenes are switched through by repeatedly pressing the switch (on/off).
- Push-button compatibility: When using a push-button (instead of a switch), the module also enables dimming by a long press.

The module is therefore not a separate switch, but uses the existing switch as an input device for Smart commands. The physical switch continues to control the module, which forwards the commands to the Hue Bridge.