The EWIO2 is a powerful data logger for the energy consumption monitoring and energy monitoring in buildings, on machines, plants and systems. Two Ethernet ports with a Daisy Chain function are available for the chain further Data logger and connection to the LAN network. The system is parameterised, configured and commissioned through a platform-independent web browser. The M-Bus and modbus RTU interfaces enable to read different meters: e.g. electricity, water, gas and heat. Simple functions and control tasks in building or industrial automation can be created and visualized via the graphic programming interface "Node-RED" integrated in the web interface and the numerous digital and analog I/Os.