about 10 years ago I got my own apartment.. as I love IT and automation ofcourse things where automated there
I modified an KAKU switch and connected this directly to the LPT port of my computer, that way I was able to switch 4 things

the lights in the living room, the kitchen, the bedroom, and the coffee machine

later we moved to our current home, and from there I decided to start over again
I bought more KAKU devices, and an RFXTRX433 to switch things on and off, a few months later I also added Oregon thermo stuff, and an youw8 scale
as things where getting bigger now I also made a website so I was able to control stuff by mobile phone.
more and more devices where connected, and now also a realtime website at http://www.xtrusion.nl came online
when I saw the energy bill I really got shocked.. over 6700kWh used for 2 adults and a baby

I bought plugwise, and started switching things on and off.. but the domotica server (normal PC) was still consuming 300+ watts
in 2013 we got the option to buy our current rental home.. and so we did..
one month later we had 10 solar panels on the roof, and the inverter was integrated in the home automation
the old domotica pc is replaced by an laptop with SSD, and all scripts are completely rewritten from scratch and running all in PHP
the old CV installation is replaced by a new Remeha Calenta and of course also an openthem gateway was put in between.
Also all radiators in the home where replaced by more efficient ones. as it was still not comfortable enough we also put isolation in the attic and in the
walls (neoperls), on the first floor the windows where single glass so we replaced them with HR glass, all this together saves us a huge amount of gas, and makes
it a lot more comfortable.. especially in the bedrooms (January 2013 the temp in one room was hot higher than 13 degrees with heating at 21 now with the heating at 15 in the
night it's not getting colder than 17 degrees)
Also all lights in the house are replaced by LED, this saves us more than 80% on electricity for the lights
Precense detection was add tot he system based on mobile phone wifi connections, so if no-one is home we don't need to turn on the lights
and we can put the CV to low temperature (saves more gas)
a "short list of all domotica related projects" done in the house till now
- Kaku integrations with rfxtrx443
- Oregon integration
- Automated ventilation system for bathroom
- Plugwise integration
- Solar panel integration
- Remeha calenta integration with opentherm gateway
- Z-Wave Clamp energycounters and switching
- 1-Wire bus temp monitoring
- Weather station integration
- RFX meter + pulsecounters for gas and water usage
- Door and window sensors
- Fritzbox integration with push notifications (NMA), and caller display on television
- Movement sensors for alarm and to switch lights
- Webcam at the front door, when the doorbell is pressed I get a picture on the phone and an NMA notification
- Mailbox automation, with NMA and webcam screenshot
- Television Setupbox integration
- Smart Switching
- Roomba vacuum cleaner integration with roowifi
- many more

All those options are not only really cool.. but also saves me over 1500+ euro on my yearly bill for gas and electricity
most of the devices are also visible on the website at http://www.Xtrusion.nl and reporting back realtime
some plans for this year
- home-build DBE on the radiators (fans already ordered)
- 2 more solar panels on the roof of the shed
- floor isolation ? maybe
- automated roller shutters on first floor
- stairway renovation
- any cool stuff that comes up hehe