need to know if this is possible.

[vtyler]

i should explain that the devices will not be physically connected to each other but the data is being send over rf transmuter pair the person I'm building if for has in stock. the project will be used to tell if a door is open and depending on if it is or not turn on and off a piece of equipment they already have in place.

[Charlie]

That makes more sense. Depending on the type of link, RF can be significantly more challenging. There are some (expensive) RF link modules that have RS-232 serial inputs. There are some cheap RF modules that will need Manchester or similar encoding in order to function. When you find out which type you have, search the forum - there's lots of good advice for both types here.

[vtyler]

i actually went searching through the parts bin and found some rf pairs that are not serial so i have it working with them.

thanks for the help