The following research involves the manufacture of a diffuse controller for monitoring atmospheric comfort in a greenhouse. The comfort in a greenhouse is defined by: the temperature that varies from 20 °C to 25 °C and the relative humidity is around 50 %. The control and monitoring of these parameters is necessary for optimal microclimate formation in a greenhouse. The calculation of the temperature and relative humidity that helps us predict comfort is performed, by implementing a soft sensor using fuzzy logic. The objective of this research is to demonstrate efficiency for the automation and monitoring of artificial intelligence processes, in this case «fuzzy logic» that is based on the user's experience. In this investigation, basic electronics, programming and intermediate knowledge in fuzzy logic were applied. All this made possible the development of the controller.