Hello everybody,
I need some help to solve a problem. 
I want to control my 9 roller shutters of my home with an interface i can plug behind my switches (the manual control system existing).
The communication with all this modules will be handle by an Arduino (WiFi or something il could manage).
I search this kind of module on the web, which could be connected to an arduino, but some of then cost more than 50€ ! (EnOcean protocol etc.)
The more interesting solution I find is a reverse engineering of RF 433MHz remote control emitter (which is connected to a arduino), and a RF receiver.
Anyone have an DIY idea or existing solution ?
Regards 
I used the following site to configure an Arduino Uno to send and receive 433Mhz signals.
I first used 433utils on a RPi to sniff out all the messages. Installed apache and php. I then found simple php website that could call 433util behind the scenes. You configure the codes into the script buttons for on and off. It's all made in HTML 5 so it instantly becomes mobile friendly and you can save it as an app like bookmark on your phone. Just google toggle php 433 to find it. Perfect soltution I used to control 433Mhz power outlets.
Thanks for your answers. These solutions could fit the purpose, but I need a 230VAC/5VDC for the arduino.
The volume avaible is very slim !
The kind of solution I look for is like FIBARO FGR-222. That could fit in the space behind my existing switch.
Regards