Hello Ami-89,
I just finished a project in which I exactly did what you are planning to do. I used a pic 16F876a to sample some signals and then transmit them to the PC using an RFM12 module.
The "final" result you can check ath the website listed in my footer.
As I developed some code to get the wireless working, I also have the bare wireless chips available.
Contact me (see profile) if you need some more info or have special questions.
Greetings Matthijsfh