The presentation outlines an automatic watering system developed for a greenhouse at the International Islamic University Chittagong, focusing on reducing labor costs and preventing over-irrigation. The system utilizes a microcontroller (Arduino Uno) and moisture sensors to monitor soil moisture levels, controlling water supply through a solenoid valve based on predefined thresholds. Limitations include the necessity for specific water pressure and the relative nature of moisture readings from the sensors.

1. Presentation
on
Automatic Watering System In Greenhouse
International Islamic University Chittagong
Department of Computer Science & Engineering
Prepared By:
Abdur Rahman(C-151023)
Minhajul Alam(C-1510001)
Foyzul Abrar Chy(C-151063)
M. Irfanul Kalam Chy(C-151110)
Yamin Sobhan(C-151020)
Ishrak Md. Imtiaz(C-151099)
Submitted To:
Abdullahil Kafi
Assistant Professor
Dept. of CSE, IIUC

2. Objectives
 To reduce the cost of labor.
 Saving the time is the major purpose of this project.
 To save the plants from being rotten because of over
irrigation.

3. Embedded System
 A microcontroller or microprocessor based system that is built
to control the functions of equipment, machinery or plant.
 Combination of hardware and software for specific
application.

4. Apparatus
 Hardware:
• Moisture Sensor module
• Arduino UNO
• 12V Solenoid Valve
• Adapter 12v
• Resistor 1k ohm
• Diode 1N4007
• Transistor TIP122
• Bread Board
 Software:
• Arduino IDE

6. How does it work:
 We will set a fixed moisture level for three moisture sensors in the Arduino
UNO.
 The three moisture sensors will detect the moisture level from the soil.
 When the detected level of moisture will exceed the given level in the
Arduino UNO, then water supply through solenoid Valve will gonna be off.
 Until then the water supply will go on.

7. Moisture sensor
Arduino UNO
Solenoid Valve
Water Supply
Block Diagram:

8. Arduino UNO:
 Arduino Uno is a microcontroller. It has 14 digital input/output pins (of which
6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a
USB connection, a power jack, an ICSP header and a reset button.

9. Moisture Sensor:
 This is a simple water sensor can be used to detect soil moisture when the soil
moisture deficit module outputs a high level, and vice versa output low.
 Operating voltage 3.3V-5V.

10. Solenoid Valve:
 The 12V solenoid controlled fluid valve. Simply connect a fluid source to the
¾" threaded inlet and it will interrupt the flow until 12V is applied to the fast-
on connectors on the solenoid.

11. Arduino Code:

12. Green House:

13. Project Pictures:

14. Limitations of this Project:
 We didn’t use a gravity-feed solenoid valve. This means that we will need
3 PSI water pressure to fully open the valve.
 As the moisture sensor can’t cover the whole field, the moisture value may vary.
 Moisture Sensor does not give absolute reading of moisture, gives relative.

15. Thank You!