A processing circuit for providing electronic photosensor information over a communication link. The processing circuit comprises a photosensor input circuit adapted to be directly coupled to a photosensor for receiving the electronic photosensor information from the photosensor. Further, a communication port is provided that allows for transmitting and receiving messages over the communication link. Moreover, a processor is provided that is coupled to the photosensor input circuit and the communication port. The processor determines whether the processor is operating in a default configuration, and broadcasts the electronic photosensor information on the communication link if the processor is operating in the default configuration.