This project is a relatively simple circuit that utilizes a PIC18LF2550 microcontroller and the Laipac TRW-24G 2.4GHz transceiver to create a wireless serial link that allows to send and receive data between Microchip PIC microcontrollers and a computer.
http://www.semifluid.com/PIC18LF2550_RF24G_serial.html
This was a test program to get serial communications going on the 12F675, because the setup is different from the 16F877. It increases a counter (which I have called COUNTER in an outburst of creativity) by one at each pass, and sends the result to the PC. The evergreen of rs232 if you like.
http://members.home.nl/b.vandam/lonely/pagina12.html
Off the shelf solutions for making control, monitoring and data acquisition wire free using low power radio or GSM cellular technology.
http://www.radio-tech.co.uk
http://big.lol.free.fr/visor/uk/index.html
using PIC16F628
http://jap.hu/electronic/irtx_pic.html
http://www.edn.com/archives/1996/102496/di_02.htm
http://www.tkk.fi/Misc/Electronics/circuits/rsbuffer.html
This software allows you to non-intrusively listen to existing communication link. This is free software designed for Windows 95.
http://www.rtcard.com/comlab32.html