The room control unit is used to control ventilation groups, as well as to record and display the current room temperature and humidity. The room control unit automatically makes the measured values available to the digitalSTROM temperature control and is therefore part of the digitalSTROM system. In combination with the respective system and smartphone apps, a convenient room temperature control takes place, which can be conveniently operated at home or on the go. To support the full range of functions, the device must be operated on a digitalSTROM meter dSM12.