DESIGN OF MICRO CLIMATE DATA ACQUISITION SYSTEM BASED MICROCONTROLLER ARDUINO ON GREEN HOUSE

Authors

  • Heidi Yanti Anggraeni Putri

Abstract

Micro climate (temperature, humidity and solars intensity) plays animportant role on growth anddevelopment of
plants.However,it is difficult to obtainthemicro climate data continuously. An automatic data acquisition system
is a such promising soluticts to this problem. The aimof this researchwas tomakemicro climate data acquisition
system in real time and save it into computersmemory. It consists of five stages included system design, sensor
calibration, systemanalysis,data acquisition, and systemtesting. MicrocontrollerArduinoUNO based acquisition
system designed has several inputs, i.e. three DHT11 temperature and humidity sensors and a light dependent
resistor (LDR). The outputs of this system were displayed on the LCD, and on the PC using virtual instrument
engineeringworkbench (LabVIEW) softwere, then the data were stored inMicrosoft Excel. The average error of
temperature sensor for eachDHT11 comparedwith alcohol thermometer readingwas 0,8oC forbothDHT11-(a)
and -(b), and 0,2 oC DHT11-(c). The average error of relative humidity (RH) sensor for each DHT11 compared
with Cole Palmers termocopel was 14,63%for DHT11-(a), 16,63%for DHT11-(b), and 11,13%for DHT11-(c).
The light intensity can be successfullymeasured using LDR voltage with an error of ± 8.98%and R of 0.9926.
Keywords:Data acquisition system, greenhouse,LabVIEW,micro climate,microcontroller ArduinoUNO

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Published

2015-05-01

Issue

Vol. 4 No. 1 (2015)

Section

Articles

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