An assignment arose from the needs of Flea, s. r. o. company, that is dealing with heating control. Based on the experience from previous installations of heating control it was decided to develop several types of hardware blocks. The first block is a control unit that is equipped with a number of digital inputs, digital outputs and inputs for temperature sensors. The control unit also serves as a gateway between LAN, RF networks, RS485 interface, M-BUS interface and OneWire interface. Additional hardware blocks are connected to the network via the RF interface. There is a digital outputs unit, a digital inputs unit (battery powered) and wall mount wireless thermometer (battery powered).