Hydroponic system design with real time OS based on ARM Cortex-M microcontroller

Hydroponic is the process of growing plants without soil, plant root flooded or moist with nutrient-rich solutions in inert material. Hydroponics has become a reality for greenhouse growers in virtually all climates. Large hydroponic installations exist throughout the world for growing flowers, vege...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2017-12, Vol.109 (1), p.12017
Main Authors: Atmadja, Wiedjaja, Liawatimena, Suryadiputra, Lukas, Jonathan, Nata, Eka Putra Leo, Alexander, Ivan
Format: Article
Language:English
Subjects:
ARM Cortex-M
Automation
Carbon dioxide
Climate
Conductivity
Flowers
growing light
Hydroponic
Hydroponics
Latency
Light intensity
Luminous intensity
mbed OS
Microcontrollers
nutrient solution
Nutrients
pH effects
pH sensors
Plant roots
Real time
RTOS
Soil moisture
Systems design
Tomatoes
Vibration
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Summary:Hydroponic is the process of growing plants without soil, plant root flooded or moist with nutrient-rich solutions in inert material. Hydroponics has become a reality for greenhouse growers in virtually all climates. Large hydroponic installations exist throughout the world for growing flowers, vegetables and some short period fruit like tomato and cucumber. In soilless culture, we must maintain stable pH and conductivity level of nutrient solution to make plant grow well, large variation of pH of certain time will poisoned plant. This paper describes development complete automation hydroponic system, from maintaining stable nutrient composition (conductivity and pH), grow light, and monitor plant environment such as CO2, temperature and humidity. The heart of our automation is ARM Cortex-M4 from ST Microelectronic running ARM mbed OS, the official Real Time Operating System (RTOS) for ARM Cortex-M microcontroller. Using RTOS gives us flexibility to have multithreaded process. Results show that system capable to control desired concentration level with variation of less than 3%, pH sensor show good accuracy 5.83% from pH value 3.23-10. Growing light intensity measurement show result 105 μmol/m2/s therefore we need turn on the light at least 17 hours/day to fulfil plant light requirement. RTOS give good performance with latency and jitter less than 15 us, system overall show good performance and accuracy for automating hydroponic plant in vegetative phase of growth.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/109/1/012017