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Topology of a Network for Wireless Transmission of Data for Use in Precision Agriculture
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: 7th World Congress on Computers in Agriculture Conference Proceedings, 22-24 June 2009, Reno, Nevada (electronic only) 711P0409e.(doi:10.13031/2013.29080)Authors: Alex Lemes Guedes, Maria Bernadete De Morais França, José Alexandre de França, Marcela Hitomi Koyama, Marcelo Giovanetti Canteri
Keywords: Keywords: wireless communication net, ZigBee, agro-meteorological station, climatic monitoring, precision farming.
Weather conditions influences the plant disease progress. Precision agriculture, besides variability of soil, could measure meteorological variables like wetness and temperature for monitoring plant pathogens infection periods. This assessment is carried out in many points of crop area and data set could be sent remotely to a device called coordinator, using a cable as transmission line. However, a cable network in a crop area has a high cost and presents operational difficulties. The objective of this work was to develop a wireless data communication between meteorological stations. The coordinator device has total control over the network. It asks for data to be transmitted and which station will receive the data, creating a communication system type question/answer. The network also incorporates the multi-hop concept, where the data do not need to be transmitted directly, but through routers, increasing the depth of the network. This logic was implemented through the local address of each device. Prototypes of meteorological stations using microcontroller were built to tests the system. The results showed that the network work satisfactorily when the distance between meteorological stations was 1800 meters or less. This enables them to be installed throughout a crop area.
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