data logger

Hi, I have built a circuit that each time the user uses it, it does a calculation and outputs the value on an LCD. Its really a big exercise so i can learn about avr’s.

I want to extend it so that it also sends the value wirelessly to a laptop, which saves the values in a text file or better, excel file, if someone knows how to do that!

I have seen the Receiver/transmitters you can buy on spark fun, and they look perfect - simple etc etc.

I dont understand though quite how you output a value to a pin, which is connected to the transmitter. I only understand how to set the pin high or low.

I should also have a starting and finishing code so that the recevier knows somethings coming?

At the receiver end:

Receiver - avr - Serial - laptop?

easiest: two XBee series one modules. Use serial port extension code that comes with them. no software protocols to write.

Is there a more specifice name, trying to find it on sparky and dont know which it is…