The EWIO, 2-MW is a powerful data logger for energy consumption monitoring and energy monitoring in buildings, machines, plants and systems. Two Ethernet ports with daisy chain function for linking additional data loggers and a WLAN interface are available for connection to a LAN or WLAN network. In addition, the WLAN interface can be used as an access point for configuration with a mobile device (e.g. smartphone, tablet, notebook). The system is parameterized, configured and commissioned using a platform-independent web browser. The M-Bus and Modbus RTU interface allows different meters to be read: e.g. electricity, water, gas and heat. The measured values can be sent optionally or in parallel by email (SSL) and FTP (SFTP) from the database (push) or read out via FTP (SFTP) (pull). Simple functions and control tasks in building or industrial automation can be created and visualized using the 'Node-RED' graphical programming interface integrated in the web interface and the numerous digital and analog I/Os. An integrated µSD memory card expands the functionality of the EWIO2-MW for storing settings, data and applications.