hi >>>>>
i have a project to wireless connect by two rooms or points. For which instruments and chips and informations will i need? with the way of connection please

 

If you will have line-of-sight between the transmitter and receiver, you can use infrared. That is inexpensive, and you do not have to worry about the possibility of radio frequency emissions.

There are many schematics available with an easy search.
Look for "IR transceiver"
or click here: http://www.google.com/search?hl=en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=IR+transceiver&spell=1

 

thanks very much my dear