Arduino as RFXCOM RFXtrx433 interface (for Domoticz)


I've just ran an Domoticz project on my Raspberry.
ATM I'm using my own code for managing 433MHz power outlets.

Is there any way that Arduino MEGA with both: receiver and transmitter can be used as a USB interface for Domotic?
It supports this device to be plugged to raspberry. I don't want to spend so much money just for device to transmitt/receive 433signals, as I have been using them already...

Is there any hope? Or other way I can flawlessly interfere with Domoticz?
Isn't this USB device using X10 for this? So Arduino can work as X10-USB-RXTX?