A camera module includes a lens carrier that houses a lens, electrical components of optical path modifiers positioned on the lens carrier, an image sensor, and a controller that is to generate commands for operating the optical path modifiers. A printed circuit assembly positioned on the lens carrier is electrically coupled to suspension wires. The printed circuit assembly includes a printed circuit that has installed thereon a serial bus communications interface circuit that is to receive the commands from the controller through one of the suspension wires, and a translation circuit that is to translate the commands into control signals that are to operate or drive the optical path modifiers via the electrical components and according to the commands, respectively. Other embodiments are also described.