A building automation system is provided and includes a wall box of a building, a control device configured to be mounted on the wall box, the control device including a micro controller and a memory, the memory having executable instructions stored thereon, which, when executed, cause the micro controller to control an environmental condition within the building, and a configuration memory unit, mounted on the wall box and external from the control device, the configuration memory unit including information stored thereon for configuring the control device, wherein, when executed, the executable instructions further cause the micro controller to access the information when the control device is mounted within the wall box and to configure the control device in accordance with the information.