Trabalho apresentado em XX IMEKO World Congress Metrology for Green Growth, 9-14 setembro de 2012, Busan, Coreia do SulThe usage of greenhouse with controlled
microclimate represents an important way to increase the
production of fruits and vegetables considering the plants
needs and has recently become one of the hottest topics in
precision agriculture. In order to know and to control the
greenhouse microclimate smart sensing nodes with wireless
communication capabilities represents the solution. As one
of promissory protocol associated with wireless sensor
network can be mentioned the ZigBee due to its low cost,
low power consumption, extended ranges and architecture
flexibility. In the present work a sensing and control sensing
nodes with ZigBee communication capabilities are
considered, while the microclimate is monitored using a set
of solid state sensors for temperature, relative humidity,
light intensity and CO2 concentration considering this
parameters with important role in plants growing. Every
sensor node uses energy from a solar cell through a battery
charger circuit considering also the powering of the sensing
and control node during the night periods. The data from
ZigBee network nodes are sent to Wireless-Ethernet
gateway connected to a computer that runs a LabVIEW
application that perform primary processing and web
geographic information system that provides information
about the greenhouse microclimate. Elements related power
harvesting for implemented wireless sensor network, as so
as a set of experimental results are included in the present
work.N/
