US Patent 9633557 Battery-powered retrofit remote control device

A remote control device may be configured to be mounted over the toggle actuator of a light switch and to control a load control device. The remote control device may include a base portion and a rotating portion supported by the base portion so as to be rotatable about the base portion. The remote control device may include a control circuit, a wireless communication circuit, and a rotary encoder circuit. The rotary encoder circuit may be configured to translate a force applied to the rotating portion into input signals, and to operate as an antenna of the remote control device. The rotary encoder circuit may be configured to provide the input signals to the control circuit. The control circuit may be configured to translate the one or more input signals into control signals for transmission to the load control device via the wireless communication circuit.