## 1 Introduction  
The production of fresh and healthy food has experienced an important worldwide demand in recent years. This is caused by population growth in regions where the production of these foods is complicated due to the weather conditions [1]. Some of these fresh and healthy foods are sprouts, as they have a good quantity of enzymes, carbohydrates, vitamins, and minerals. Sesame seeds are oilseeds that have good nutritional characteristics and contain 50-60% oil rich in unsaturated fats, 20% proteins and 6.4-21% carbohydrates [2, 3, 4]. In addition, they are a good source of minerals such as calcium, phosphorus, zinc and magnesium; thus, they are included in people's diets [5]. One of the ways to take advantage of sesame's nutritional characteristics is seed germination. The germination process produces effects on the biochemical composition of sesame seeds in which the type of seed and germination conditions are involved [6]. For sprout production, traditional techniques such as pots, glass jars or wet towels have been used, mainly in homes for personal consumption [7]. The traditional technique, being exposed to the outside, complicates the germination process due to not being able to control variables to maintain the appropriate conditions. For this reason, sprouts are also produced in a controlled environment, where the crop is isolated from the outside, modifying its environment to extend the harvest period, increase yield, improve sprout quality and dispose of the products when traditional production is limited [8]. Temperature,humidity and soil moisture are involved in the germination process [9; 10; 11]. Temperature and humidity are physical variables that define the behavior of vapor pressure deficit (VPD), and this is a way of measuring the climate inside a greenhouse. VPD control represents a useful tool to solve physiological problems in plants, and it helps to improve the absorption of water and fertilizers from the soil, which would benefit the sprouts in obtaining the necessary nutrients to develop and obtain better yield of the crop and better quality of the product. To achieve this, it is required to use intelligent control algorithms that maintain the temperature and humidity within the appropriate values for the VPD to improve the production of sesame sprouts [12; 13; 14]. Investigations related to climate control in greenhouses have been reported in recent years. In [15; 16; 17], greenhouse climate control designs evaluated in simulations with fuzzy control techniques were presented. Investigations have also been presented where fogging, micro-fog and airflow systems were applied for the control of VPD in a greenhouse, screenhouse and chambers, as mentioned in [18; 19; 20; 21; 22]. The VPD has been mathematically modeled as reported in [23]. Based on the above, in [24], work was presented where VPD is modeled using fuzzy logic. The climatic conditions to produce sprouts have been considered for research related to sesame seeds. Studies have been presented where sesame seeds were germinated under different environmental conditions to determine the germination parameters and the sprout size [25; 26; 27; 28; 29]. Additionally, [30; 31; 32] analyzed the nutritional content of sesame sprouts produced under different physical conditions. Previous investigations have designed and simulated intelligent climate control systems in greenhouses. However, these works do not consider the characteristics of the actuators that they control in the implementation of their designs, and do not establish the mathematical equations of those systems. Although fuzzy logic has been used to model the behavior of VPD, an intelligent control focused on VPD as a convenient tool in sesame sprout production in a controlled environment is not mentioned in previous research.