I have a project that's currently using Arduino Uno with a cheap class-2 bluetooth serial adapter from ebay to send and receive data and control a LED light strip.
However, it struggles to establish connection at distances more than couple meters. I'd like to expand that range a bit - 15 meters with two load-bearing walls in the way. Bandwidth requirements are next to none - it should just move couple integers around.
Any suggestions how to do that on the cheap? From what I've seen, class-1 bluetooth adapters go for ~60$, two xbee modules + usb adapter end up costing even more, and wifi solutions seem to reside in the same price range. At that price point, it seems better to get a raspberry pi, wifi dongle and a couple beers for the software re-write. Am I overlooking some solution?