Hi again guys,
I haven't spoken for a long time but I was working on a new project.
The result of my work is ready to use:)
I made a as easy as possible platform for DIY homekit stuff. It's for all user with no tech knowledge as well. Anyone can handle it!
Currently, the most interesting and advanced software is indoorSensor. You can build your own homekit room device measuring many different values like PM, TVOC, eCO2, temperature, humidity, light level, air pressure, noise, motions and many others with cheap AliExpress hardware 
list of supported device You can find here http://dziky.pl/homekit/homekit-indoorsensor-1-0-1/
If you need help to start feel free to contact me. There's not many guides yet but hope i'll add soon others ready to use diagrams and configs.
