@misc{10481/57992,
year = {2018},
month = {4},
url = {http://hdl.handle.net/10481/57992},
abstract = {Improving the sustainability in agriculture is nowadays an important challenge.
The automation of irrigation processes via low-cost sensors can to spread technological advances
in a sector very influenced by economical costs. This article presents an auto-calibrated pH sensor
able to detect and adjust the imbalances in the pH levels of the nutrient solution used in hydroponic
agriculture. The sensor is composed by a pH probe and a set of micropumps that sequentially pour
the different liquid solutions to maintain the sensor calibration and the water samples from the
channels that contain the nutrient solution. To implement our architecture, we use an auto-calibrated
pH sensor connected to a wireless node. Several nodes compose our wireless sensor networks (WSN)
to control our greenhouse. The sensors periodically measure the pH level of each hydroponic support
and send the information to a data base (DB) which stores and analyzes the data to warn farmers
about the measures. The data can then be accessed through a user-friendly, web-based interface that
can be accessed through the Internet by using desktop or mobile devices. This paper also shows the
design and test bench for both the auto-calibrated pH sensor and the wireless network to check their
correct operation.},
organization = {The research leading to these results has received funding from “la Caixa” Foundation and
Triptolemos Foundation. This work has also been partially supported by European Union through the
ERANETMED (Euromediterranean Cooperation through ERANET joint activities and beyond) project
ERANETMED3-227 SMARTWATIR.},
publisher = {MDPI},
keywords = {Wireless sensor networks (WSN)},
keywords = {Internet of Things},
keywords = {Hydroponic agriculture},
keywords = {Potential of hydrogen},
keywords = {Smart farming},
keywords = {Precision agriculture},
title = {Smart System for Bicarbonate Control in Irrigation for Hydroponic Precision Farming},
doi = {10.3390/s18051333},
author = {Cambra, Carlos and Sendra Compte, Sandra and Lloret, Jaime and Lacuesta, Raquel},
}