The video (not mine!) explains the settings of a similar system I am using. For more info, go to http://openenergymonitor.org/emon/
Other sites where I publish live data: http://daturach.github.io/
Pellet Boiler monitored by a Yoctopuce Yocto-Knob to allow more advance control & notifications. Four temperature sensors and one light sensor to monitor the alarm LED are connected.
Nov 2014, Now using TalkBack to control boiler from mobile phone.