Central reading system CRS 40 V2 is designed for data reading from radio heat cost allocators (E-ITN 30) and radio modules for water meter (E‑RM 30) transmitting in the 868 MHz ISM band. The reading network consists from one or more collecting units A (repeater) for data reading and one control unit B (concentrator) that coordinate the reading network and send the data via Internet (Ethernet, Wi-Fi or GSM) to the remote operator. Control unit B is also used for reading setting (error logs, reading plan and base of plan) and for data backup for 13 months. All units of reading network communicate via wireless network. Units are power supplied from alternative current electrical network 230 V. Data from heat cost allocators and radio water meters are read every day. Operator can log into the reading network from his computer via encrypted connection using simple web graphic interface. E-mail or synchronization script can be used for automatic data transfer from reading network. Central reading system CRS 40 V2 is intended for installation inside the residential buildings.