BrewPi open source brewing controller
Arduino, code, how-to, R-Pi and tagged beermaking, BrewPi.
Here’s an interesting project to automate your home beermaking process. “BrewPi is an open source fermentation controller that runs on an Arduino (for now) and a Raspberry Pi. It can control your beer temperature with 0.1 degree precision, log temperature data in nice graphs and is fully configurable from a web interface.” The Arduino is used as a slave to the R-Pi for GPIO purposes due to crash problems with the R-Pi.