I would like to build a temperature/humidity station with the Pi, but I need several remote sensors to distribute around my house (crawlspace, attic, various rooms where I have plants, and yes, outdoors, maybe eventually in a greenhouse which I plan to build). It'll be easy to use a different Pi with GPIO-attached T/H sensors in each location, and then use WiFi to consolidate all the information somewhere. But that's tedious (build several identical units, calibrate each one to the same standard, house and power each one, etc) and expensive (I don't really need a fully fledged computer at each location). Moreover it's complicated to power outdoors.
One other option would be to use "bricks", which could be less tedious, but that is not cheaper, since just the master and the wifi cost almost $100 (to be multiplied by the number of stations), and has similar housing/powering issues.
Alternatively, something simpler and cheaper might be possible using some off-the-shelf parts such as this one, and having a single Pi with a receiver for all the sensors. Does anybody know if a receiver for the Pi exists for this remote T/H sensor? Or better, if there is any remote-controller T/H sensor for the Pi (allowing multiple channels)? Or maybe general-purpose remote controller for sensors?
Or any other suggestions on how best to do this?