BrewBench is an Arduino brew monitor, controller and alert system for the home brewer enthusiast. It uses the Arduino REST API to interface with thermistors connected to the analog ports. You can also connect a relay to the digital ports and add a heater and pump to create a RIMS system. The software will start/stop the heater/pump based on the target temperature you set. There is a hop and mail reference and you can import recipes from BeerSmith.