Karol,

I have been using the Radiometrix TX3 and RX3 to send information from one 8051 with attached keypad to five other 8051's to control 300 LED's.
I probably know all you need to make your device work.
It seems that you have never worked intimately with a microcontroller before. It is an entirely different world. You probably need to get a databook describing the microcontroller that you plan to use.
Personally I prefer writing all my code in assembly language because it is faster, takes less program memory and gives the programmer more control.
If you need any more help please contact me a my address:

evertech@juno.com

Buck