Controlador eletrônico para casas de vegetação: sistema baseado em plataforma eletrônica de baixo custo

Abstract

Rationalizing the use of energy resources is fundamental in all sectors of agriculture. Knowledge related to microenvironmental control in greenhouses requires skilled labor, which is a barrier in many regions of Brazil. The objective of this work was to develop an electronic system for internal microclimate control in greenhouse, with the differential of having in its programming algorithms related to plant physiology, as well as to verify if the control system affects crop productivity. lettuce "lactuca sativa". The control system was developed based on the Arduino ™ Mega 2560 prototyping platform and compatible transducers. The operating software was developed in C / C ++ language, containing information related to the phenological stage of the crop, and providing ideal conditions of temperature, relative humidity, soil moisture and global radiation through actuators. An experimental field analysis was carried out over a production cycle for two lettuce varieties. The experimental results showed that the designed equipment worked according to the implemented programming algorithm, correctly controlled the actuators and increased by 26.7% the productivity of the lettuce type and 29% the productivity of the crisp lettuce.