The software is still in testing, but it seems to do a great job
Raspberry PI is one of the most acclaimed mini-pc, making a real impact in the Linux hacking community, but who would have thought it can be used for beer brewing.A Raspberry Pi and beer fan has created an interesting open source tool called “The Raspberry Pi Brewing Controller,” or shortly put, BrePi.
According to its developer, BrewPi is an open source fermentation controller that runs on an Arduino (for now) and a Raspberry Pi. It can control the fermentation temperature with 0.1 degrees precision, keep logs of temperature data, and has a configurable web interface.
Raspberry Pi relies on an ARM processor with a clock speed of 700 MHz, 256 MB of RAM, an SD card slot and a 5V Micro USB connector that supplies the power. It also features RCA and HDMI ports.