Diseño e implementación de un prototipo de red inalámbrica con nodos inteligentes para el monitoreo en cultivo aeropónicos.

Abstract

A wireless network prototype with smart nodes was designed and implemented for monitoring aeroponic chard crops. The technical, theoretical, and practical requirements were analyzed to support this research work through bibliographic study. The inductive method was used with field and laboratory work for correct precision in aeroponic crops. The prototype is made up of an acquisition and a coordinator node. The information is processed and sent through Xbee technology in a mesh-type network to the coordinating node through the data acquisition node's sensors. The received information is stored on a micro SD card and is also uploaded to the cloud to the ThingSpeak page, where the information is represented graphically and in real-time, it can issue alert messages when an unauthorized level is detected in aeroponic chard crops. The absolute error in pH measurements of +/- 0.1, the electrical conductivity of +/- 1, total dissolved solids of +/- 2, water and ambient temperature + / - 1 were obtained from the tests carried out by using the standard equipment. Therefore, the sensors do not present significant errors. The prototype's stability was demonstrated from the coefficient of variation and a value lower than 7%. The communication tests carried out between the nodes showed that up to 550 meters with the line of sight and 50 meters without sight, there is no data loss. It is concluded that the implemented prototype can become a helpful tool to provide relevant information for the person who is in charge of decision-making. It is recommended to incorporate a module to report water and nutrients levels to manage the aeroponic crop better.