Configuring the controller itself is done before the software is compiled, and it includes a GUI since one of the design ... PID controllers to take a look at like this one built for an Arduino ...

Unperturbed, [George] took this opportunity to design and build his own PID thermostat controller instead. He’s using an Arduino Uno clone called the Seeduino Lotus, which has easy to use ...

The other innovation is the PID controller which uses feedback loops ... The whole lot is controlled by everyone's favorite robot brain, the Arduino. Both hardware and software will be open ...