I had a look at your website (I think you are much better in creating technical appliances than websites 
)
The system you have created looks awesome, bit also quite complex to build. I think I have a similar system at home through Honeywell’s Evohome system including a Ninjablock (which is starting to become redundant) and a raspberry pi. Ok, most probably the cost of my system is much higher (around €900 for all switches, heating controls etc)
Find the script I am using to get the Evohome values here: Script for feeding Honeywell Evohome data into Emoncms