I have a yellow jacket winging it's way over from the good 'ol U.S of A right now that I intended to use for a specific project. However I've started thinking of lots of projects that could use it. Unfortunately at $55 a pop and weeks of waiting they're not practical to use lots of. So I started to think about combining one with a rx tx pair of RF boards. Then come up with some sort of comms scheme (or borrow one) to communicate with the end devices. Has anything like this already been done? I'd hate to be re-inventing the wheel.... It would mean that I could add wireless IP connectivity to any projects for £10 which would be great.
In terms of scheme I think for simplicity I'd start with a polling type implementation. Whereby nodes would only speak when spoken to.