Check out the brewtroller website... lots of documentation, and plenty of help. The thing with the brewtroller/fermtroller is you can make it as simple or complicated as you like. Additionally, I do believe they sell a pre-soldered "kit".
JCdillin on HBT here is one of the men behind the mission of brewtroller. It is a great product.
Trinke Das Bier Das Du Gebraut Hast