An update after the earlier blog:
Today, Jan updated the Arduino software, also trying out a new Artisan setup that supports a "background roast" using the Artisan PID to follow a pre-designed roast profile. The background is not followed yet so we missed a setting but the PID keeps a fairly stable target temperature. Tije fixed the new safety switch that Jan has brought along. In case of software failure, if you want to switch off the heater and keep the blower active in order to cool the beans and prevent overheating of the element, the switch bypasses the Arduino control board.
Today, Jan updated the Arduino software, also trying out a new Artisan setup that supports a "background roast" using the Artisan PID to follow a pre-designed roast profile. The background is not followed yet so we missed a setting but the PID keeps a fairly stable target temperature. Tije fixed the new safety switch that Jan has brought along. In case of software failure, if you want to switch off the heater and keep the blower active in order to cool the beans and prevent overheating of the element, the switch bypasses the Arduino control board.