I'm building a project that will have 3-4 dumb buttons (something like Easy Buttons) all needing to interact with the RPi. In this setup, wireless is really the only option, but most of the options I've found are transmitter/receiver pairs that would need a microcontroller for each button. That seems overkill to me, but I can't seem to find many transmitters that are uniquely IDed. I'd like to make the buttons as simple as possible, partly because they are likely going to be battery powered. Additionally, the range is about 30 feet.
I've found this remote from Adafruit, but I'd have to buy multiple and only use one button of each. That might do, but I'm also worried about the <25 foot range.
Anyone know of any good options for this?