A control system includes a host device and a string of slave devices coupled in series. The host device includes a first transmission unit operable to transmit an encoded control signal provided by a first processing module, and to receive an encoded feedback signal for subsequent decoding by the first processing module. Each of the slave devices includes: a driven member responsive to a driving signal for generating an event; a driving unit operable to provide the driving signal; a detection unit generating an initial feedback signal based on the event; a second processing module capable of decoding the encoded control signal so as to drive the driving unit when an address code in the encoded control signal corresponds to the slave device, and of generating the encoded feedback signal; and a second transmission unit operable to receive the encoded control signal, and to transmit the encoded feedback signal.