IoT-based intelligent irrigation management and monitoring system using arduino

TELKOMNIKA, Vol.17, No.5, October 2019, pp.2378~2388
ISSN: 1693-6930, accredited First Grade by Kemenristekdikti, Decree No: 21/E/KPT/2018
DOI: 10.12928/TELKOMNIKA.v17i5.12818 ◼ 2378
Received July 19, 2018; Revised March 14, 2019; Accepted April 23, 2019
IoT-based intelligent irrigation management and
monitoring system using arduino
Fidaus Kamaruddin1
, Nik Noordini Nik Abd Malik*2
, Noor Asniza Murad3
,
Nurul Mu’azzah Abdul Latiff4
, Sharifah Kamilah Syed Yusof5
, Shipun Anuar Hamzah6
1,2,3,4,5
School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia,
Johor Bahru, Johor, Malaysia, tel: +607-553 3333
6
Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia,
Batu Pahat, Johor, Malaysia, tel: +607-453000
*Corresponding author, e-mail: firdauskamaruddin@gmail.com1
, noordini@utm.my2
, asniza@utm.my3
,
muazzah@utm.my4
, kamilah@utm.my5
, shipun@uthm.edu.my6
Abstract
Plants, flowers and crops are living things around us that makes our earth more productive and
beautiful. In order to growth healthy, they need water, light and nutrition from the soil in order to effect
cleaning air naturally and produce oxygen to the world. Therefore, a technology that manage to brilliantly
control plants watering rate according to its soil moisture and user requirement is proposed in this paper.
The developed system included an Internet of Things (IoT) in Wireless Sensor Network (WSN)
environment where it manages and monitors the irrigation system either manually or automatically,
depending on the user requirement. This proposed system applied Arduino technology and NRF24L01 as
the microprocessor and transceiver for the communication channel, respectively. Smart agriculture and
smart lifestyle can be developed by implementing this technology for the future work. It will save
the budget for hiring employees and prevent from water wastage in daily necessities.
Keywords: arduino, internet of things (IoT), irrigation system, wireless sensor network (WSN)
Copyright © 2019 Universitas Ahmad Dahlan. All rights reserved.
1. Introduction
Industry 4.0 has spread nowadays and Internet-of-Things (IoT) is very familiar to be
heard with its specialize in automation system. IoT can communicate between human and
things by sending and receiving the information signals. IoT can be defined as interaction that
not require physically touch either human-to-human or human-to-computer and it has many
unique identifiers and the abilities to send or receive data over a network due to its interrelated
with any devices, machines, objects, animals or peoples. IoT is widen in many creativities and
assure that can upgrade the quality of life and reduce the gaps between elderly and modern
technology [1]. In order to live in the world with wirelessly connected, Wireless Sensor Network
(WSN) also had been studied to focus on features that easily movable object and
wire-cost-efficiency. Studied had carried on applications such as civilian, military, visual sense
models where they only consume less power that formed by the sensor nodes [2]. Thus, future
work will be more advanced with the exist of IoT and WSN technologies with varieties lifestyle
and works.
IoT has also been very aggressively applied in agricultural to improve the agricultural
system [3-7]. In [8], Controller Area Network (CAN) communication has been proposed in order
to handle communication between distributed nodes for irrigation system. A solar powered
remote management and automation system for agricultural activities through wireless sensors
and IOTs has been proposed by Navulur [9]. It comprises a hardware platform based on
Raspberry-Pi micro controller which configured to connect with a user device and accessed
through the internet network. Other project [10] uses a Simple Link WI-Fi module (CC3200)
which connects the hardware system to internet and it monitors PV system, controls the motor
and solenoid valve for pumping water to the field on the statistics obtained from the water level
sensor and soil moisture sensor. Another works on irrigation systems are also focused on
utilizing solar power [11-15]. Precision Agriculture (PA) with cloud computing has been
discussed in [16] that will optimize the usage of water fertilizers in smart agricultural. It manages

TELKOMNIKA ISSN: 1693-6930 ◼
IoT-based intelligent irrigation management and monitoring...(Nik Noordini Nik Abd Malik)
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to maximize the yield of the crops and also help in analyzing the weather conditions of the field.
There is also a paper which proposed an intelligent irrigation control system that combined
fuzzy system and neural network to aim for water-saving [17]. Irrigation system optimization with
limited water supplies efficiency of water application is proposed in [18] by applying the elitist
non-dominated sorting genetic algorithm (NSGA-II). Different plants will need their different own
necessities such as water, light and nutrition to ensure that they will grow well and healthy.
However, there are several cases that make them difficult to grow such as during hot day which
will make them too dry or during a heavy rain which will make them too wet [19]. The home
owner who care about their garden might face a watering problem when they left their home for
a long time of period [20]. So, people need long distance controller such as using a smart phone
to manage the watering system of their plants and obtain their plants’ data conditions such as
soil moisture and visible of light. Thus, this proposed work will ensure them to be unworried
about their plants although leaving their garden for a long time of periods. Normally, irrigation
system in agriculture used the largest amount of water compared to other systems in
the world [21]. Mostly, irrigation system in agriculture used timer in order to implement
the period of time of their system to perform the watering [22].
Thus, there will be the wastage of water during rainy day where the soil is already in
the wet condition. In the market, there are a lot of garden monitoring systems with a very high
price thus unaffordable for a people who only have a small area of garden such as home
garden. Additionally, most of the products with wire connection which will limits the distance if
the users want to remove their vase freely or plants’ container to other places. Moreover, other
market products also do not smart enough to control their garden and lack of function.
Therefore, this paper focuses on IoT-based intelligent irrigation management and monitoring
system where user can monitor and manage the growth of their plants although from location
elsewhere. This work develops an IoT, WSN and Android Application which fulfil costumers
need with a low-cost and power efficient. The proposed irrigation system can be performed both
manually and automatically. The proposed manual system utilizes a smart phone as a platform
where the user can manually perform the watering from long range distance, while the proposed
automatic system depends on either the timer setting or the condition of the soil either it is still
wet or dry.
2. Proposed System Design
2.1. Hardware Development
The proposed IoT-based irrigation management and monitoring system consists of an
integrations work between hardware, software and IoT parts which fulfil the objectives of this
research. The hardware parts contain of two main microcontrollers; Arduino UNO that works as
sensor node and base station. For the sensor node, both soil moisture sensor and NRF24L01
are connected to the Arduino UNO. Soil moisture sensor is connected to analogue pin A0 of
the Arduino UNO. The sensor is operating at 5V DC voltage supply. The NRF24L01 is
connected through SPI pin where it uses MISO, MOSI, SCN, SCK, CE, VCC (3.3 VDC) and
GND (0). Thus, soil moisture sensor will collect the data from soil humidity and send to the base
station through NRF24L01.
For the base station part, light-dependent resistor (LDR), mini water pump, NRF24L01
and Wi-Fi module (Node MCU-ESP8266) are connected to the Arduino UNO. The LDR with
12 kΩ is connected to analogue pin of Node MCU. The NRF24L01 for the base station also use
SPI pin similar to the connection at the sensor node. The Wi-Fi module uses serial pin
connection with Arduino UNO by using digital pin 1 and 2 which are Tx and Rx. The mini water
pump is connected to digital pin of Node MCU (ESP8266) through transistor which act as an
amplifier and switch for triggering the water pump. The base station will receive the data from
the sensor node and send to the cloud server. This project used Thingspeak as cloud server to
record all the data in the database and link with android application. Once the irrigation system
is enabled, the mini water pump will pump the water from the water tank and perform
the watering process. Figures 1 and 2 show the proposed smart irrigation system and
the schematic diagram, respectively.
2.2. Software Development
There are two parts of the software development in this work. The first part is
the software development for the Android Application, whereas the second part is the software

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TELKOMNIKA Vol. 17, No. 5, October 2019: 2378-2388
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programming for the Arduino boards. In order to write the programming, Ardunio IDE must be
installed first where the board manager and library must be downloaded from internet. Board
manager is depending on the selected device board, i.e. Arduino UNO, Arduino Mega and Node
MCU, while library is the internal programming for the kit’s pin. This project used Arduino UNO
as board manager and several libraries such as ESP8266, SPI, nRF24L01 and RF24.
The developed Android application is used to obtain the data from the hardware system and
monitor the function of watering system [23]. The developed application is started with user’s
log-in first before it can be functional. The proposed system also can be monitored in a very
long distance through cloud server. Other than that, user also can set an alarm for the soil
moisture level threshold to remind them that their plants are in critical situation. Thus, they will
know that the watering system had a problem due to a failure of pump, tank or absence
of water.
In order to develop an IoT in this project, the cloud is created to perform the database
and act as medium to save and transfer the data between hardware and gadget [24]. The data
from the cloud server can be downloaded as an excel file to analyze the condition of plants
based on the graph. Other than that, the Android application will read the data from the cloud
and remind user for any problem about their plants. User also can give manual command from
Android application to monitor their plants. The selected action will be then operated at
the hardware parts.
Figure 1. Proposed intelligent irrigation monitoring and management System
3. Implementation of the Proposed Irrigation System
The implementation of the IoT and WSN in the proposed irrigation system consists of
several parts as shown in Figures 3 and 4. The sensor node starts by reading the soil moisture
level data in order to identify the level of soil dryness. The node then sends the information by
using radio transceiver to the base station. After that, the light exposed data from the light
sensor is also read by the base station. The base station then sends both data, i.e. moisture
level and light exposed to the storage server which is a cloud server. This proposed smart
irrigation system can operate in two different scenarios, automatic and manual operation with
and without internet connection.
User also can manage and monitor both data on soil moisture and light exposed by
browsing the cloud web server. In addition, the developed android application with user-friendly
interface can be another platform to monitor the watering progress. In this android application,
user can choose their own setting on the selected moisture threshold values at the sensor node.
User can choose to manually perform the watering process by clicking the watering button on
the android application. Once the watering process is finished, a display of moisture meter
shows an increment level in real time. Figure 5 shows the flow chart of the whole process.

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(a)
(b)
Figure 2. Schematic diagram for (a) base station and
(b) sensor node3: implementation of the proposed irrigation system

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Figure 3. Sensor nodes and base station Figure 4. Hardware setup
Figure 5. Flow chart of the whole process
Three new methods have been proposed and implemented in this work:
− sensor node packaging;
− monitoring and manually watering process using Virtuino;
− Wi-Fi routine checker using timer interrupt;
these three newly methods will be discussed in the next subsections.
3.1. Method 1: Sensor Node Packaging
Sensor nodes packaging is implemented in this work to identify the different data that is
received from different sensor nodes. The most significant bit (MSB) of every sensor node is
given with different single-bit-number so that the system can recognize different sensor nodes in
each related plant. These data then will be upload to the cloud. Figures 6 and 7 show
the programming codes for developed sensor node packaging at the sensor nodes and base
station, respectively.

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Figure 6. MSB for sensor node 1
(at the sensor node)
Figure 7. Programming codes for sensor
nodes identification and transfer data to cloud
server (at the base station)
3.2. Method 2: Monitoring and Manually Watering Process using Virtuino
Virtuino android application has been developed to monitor the data of real-time soil
moisture and sunlight exposed as shown in Figure 8. In this apps, user can set an alarm system
as a warning for any critical level of soil moisture. Additionally, the user can choose to manually
give a watering command to the irrigation system. This developed system is used as a remote
to manually watering and monitoring the real-time soil moisture and sunlight exposed.
The watering system is set up so that the switch will trigger the mini water pump for 3 seconds,
i.e. similar to 15 ml of water. User must connect the application with the internet in order to
download the real-time data from the cloud server into the android application. This is shown in
Figure 9. Other than that, user also can set the alarm for the critical level of soil moisture in case
if their plants are facing problem of receiving water as shown in Figure 10. This application can
be operated at any place as long as the place has an internet coverage in order to communicate
with cloud storage.
Figure 8. GUI remote for irrigation system using Virtuino

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Figure 9. GUI for connect the application with internet Figure 10. GUI for setting the alarm
3.3. Method 3: Wi-Fi Routine Checker using Timer Interrupt
Internet is the important things for IoT. Therefore, the development of Wi-Fi routine
checker is implemented in this system to avoid internet disconnection maybe due to heavy rain
or others disturbance. Figure 11 shows the programming of Wi-Fi routine checker. The interrupt
timer will start count while the main loop is executing. When the timer for Wi-Fi routine checker
is executed, then the interrupt will occur and check the internet connection. After performing
the interrupt, the timer of Wi-Fi routine checker will be reset to zero. Figure 12 shows
the programming code for setting the initial timer to zero.
Figure 11. Programming of Wi-Fi routine checker using timer interrupt

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Figure 12. Interrupt programming in setup function to set the initially timer interrupt to zero
4. Results and Analysis
4.1. Specification of Water Volume Vs Soil Moisture Level
The specification of water volume versus soil moisture is shown in Figure 13. The data
is recorded every 5ml of water which used for watering the soil. The soil will start to dry when
the value of soil moisture is below 375. The critical condition is when the soil moisture is below
200 where the soil is too dry. The soil moisture has specification value that react with water.
The value of soil moisture is increased after adding every 5 ml of water. The soil is lack of water
when below 400 and very dry when below 200. Most soil moisture value used percentage level
equation as:
Soil moisture % =
𝑠𝑒𝑛𝑠𝑜𝑟 𝑣𝑎𝑙𝑢𝑒
1023
x 100% (1)
The value of 1023 is the maximum value of analog reading which 10 bit because of
ADC. Thus, by using (1), the percentage of soil moisture is 20% when the soil is too dry, 36%
when lack of water and 71% when excessively of water where it can reduce the soil nutrition.
Figure 13. Water volume vs soil moisture level
4.2. Experiment of Soil Moisture Level in 4 days
Experiment was performed in 4 successive days, i.e. Day 1, Day 2, Day 3 and Day 4.
At Day 1, the initial condition of soil is measured. It showed that at Day 1, the value is 977 and
416 for light exposed and soil moisture, respectively. Figure 14 shows sunlight exposure and
soil moisture of plants in one graph. Both data have been taken every hour and plotted in
real-time. These results were tabulated for four successive days for soil and weather monitoring.
At 9.00 am on Day 2, the plants were experimented by first watering with 30 ml of water.
The value of soil moisture increased until 700 for a short period of time and then it decreased
slowly from 10.30 am until 1.00 pm on the next day. Day 4 is the last day of the data recorded
where the soil is dry because the soil moisture sensor value is below 300.

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Figure 14. Experiment of soil moisture level
4.3. Automatic Watering Action System
The experiment was then tested to perform automation system on Day 5. The initial
condition of soil moisture level is 676. This system then automatically performed the irrigation
when the threshold value of soil moisture is below 500 which is 48.8% as highlighted in
Figure 15. The smart automatic irrigation system manages to prevent the soil from dry and
ensure the constant level of soil moisture.
4.4. Manual Watering System
In Day 6, the automation system was tested with user manual watering by using android
application. The initial condition of soil moisture level is 455 and slowly dry until perfoming an
automation irrigation at soil moisture level 300. Then the user interrupted the system by
watering the plant at 4.00 pm. It shows that the value of soil moisture increases drastically until
711 as in Figure 16.
Figure 15. Experiment on
the automatic action
Figure 16. Manual watering system

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4.5. Monitoring from Android Application
Figure 17 shows the first, second and third page of the android application. First page of
the android application shows that the initial condition of the soil moisture is constantly at
19.5%. After the manual watering was applied at the green line in page 2, the value of soil
moisture increased until 48.88%. Thus, the user can monitor their plants by using this
application and manage to save the data tabulated in document file such as Microsoft Excel.
5. Conclusion
This work has successfully implemented water irrigation system that meet the objective
of water-saving purposes since it is equipped with self-intelligent capability. The results showed
that the condition of soil moisture is under good supervision as it is proved that the proposed
irrigation system did not perform the watering process when the soil is above unrequired
watering purposes level or during rainy day. Therefore, the system manages to save the usage
of water and prevent the plants from being overwater or flood. The system also successfully
implemented several methods, i.e. sensor nodes packaging that can differentiate each of user’s
plants; wireless communication between sensor nodes, base station and android application
for controlling system in an unlimited range; and Wi-Fi routine checker to overcome
the disconnection of an internet. This proposed work helps to reduce a manpower
requirement in agriculture system. Future works will consider LoRa [25] as one of
the communication systems.
Figure 17. Real-time monitoring using Virtuino
Acknowledgements
The authors would like to thank all who contributed toward making this research
successful. The authors wish to express their gratitude to Ministry of Higher Education (MOHE),
Research Management Center (RMC) for the sponsorship, and Advanced Telecommunication
Technology Research Group, Universiti Teknologi Malaysia for the financial support and advice
for this project. (Vot number, Q.J130000.2523.11H60 and Q.J130000.2451.04G72).
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IoT-based intelligent irrigation management and monitoring system using arduino

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