The previous thermal analysis has shown the performance of collector could be noticeably improved by using a smart controller. Of course, to develop a smart system is probably a completely new task considering issues as: weather forecast and special user de- mands by internet connections, fuzzy logic algorithms that could learn from user's demand pattern, etc., but now in this first work we want to illustrate the way as a microcontroller could solve some special working cases. First, let us checking the input variables that could be monitored from external sensors: