The system uses relay modules to separate high voltage and low voltage devices. Data from sensors and RTC is printed out to serial the monitor for testing purposes. Live charting can be done offline using a web server.
Asynchronous JavaScript and XML can be used to transfer sensor data from a webserver to a client. The web interface can be accessed by hard coded IP address. In occurrence of sudden power outages system will load latest data from SD card and send it to be displayed.