I want to control a number of simple gadgets from a central control unit. The communication in both directions should be via unsrestricted low-power RF. Range will be less than 15 meters, and 10 will probably be enough. I want to use the same unit in each case, hence the multiple outputs and inputs.

In one case I have one wired output required and two wired inputs.

In another, I want two wired inputs and four wired outputs.

In a third, I want two wired inputs and one wired output.

All have a link to the main controller, and that will probably be time-sliced in some primitive way. The RF unit doesn't have to be integrated with the microcontroller, and the microcontroller doesn't necessarily have to be an 805x type, though that would be really convenient. The RF unit must be able both to receive and transmit, though it is probably not terribly important that it be really quick. The function of these modules will be quite primitive, e.g. opening/closing a door, window, or window shade, depending the presence of light or other easily detected conditions.

I'd be perfectly happy to buy an off-the-shelf product, provided it's not too costly, since I need quite a few of them for my prototype. If they were sufficiently small, something on the order of those RFID tags would possibly work, since they're the size of a pinhead and cost about that much. I could put several of them in a single unit, so long as the whole thing didn't get larger than half a business card and 10-12 mm or so thick.

RE