Sara Ubelhart, Sole proprietor of, Zocalo coffee house roasts from an classic hand built roaster made by the San Franciscan Roaster Company. The roaster comes with , These features provide the data source for the roaster's Artisan deployment. The EPA requirement stated , "". To achieve this an additional thermocouple and current sensor was added to the afterburner. Inside the afterburner control panel an Arduino micro-controller was added to provide a live data source for the afterburner temperature and current drain through the roaster vial a serial interface.
A perl daemon runs on the roast logger workstation (link to article and section anchor above) polling the serial port and logging the afterburner temperature and roaster power state (any current being used and the roaster is on). This allows for generation of the reports required by the EPA to be generated with SQL.