Introduction: Automatic Flower Plant Watering Project-arduino

By
About: undergraduate of University of Moratuwa ,SriLanka

Hello guys!

today im going to explain how to water your plants ,with a water control system.its super easy .you just need a an arduino,lcd screen and a moisture sensor.dont worry i'll guide you step by step through the processes.so what we are doing in here is

  1. using a soil moisture sensor measuring the moisture level
  2. display the moisture level on lcd (0%-100%)
  3. if the moisture level is less than 60% turn ON red LED ,if its less,turn ON green LED
  4. if moisture level is below 60%you must water your plant by opening the water valve(by servo motor)the valve must open proportional to the moisture level.
  5. display the watering state on LCD (OPEN/CLOSE)

super easy! lets go through the steps

Step 1: Finding Components

you need

arduino uno/mega 2560 and USB cable

https://www.ebay.com/itm/ATMEGA16U2-Board-For-Ardu...

red led,green led

16 X2 lcd screen

https://www.ebay.com/itm/16x2-Character-LCD-Displa...

tower Pro micro servo 9g

https://www.ebay.com/itm/TowerPro-SG90-Mini-Gear-M...

moisture sensor

https://www.ebay.com/itm/Soil-Humidity-Hygrometer-...

potentiometer

jumper wires,mini breadboard

Step 2: Interfacing Moisture Sensor

from the moisture sensor , we are getting analog readings from 0-1023 so we do not need digital I/O pins of arduino.but we need analog A0 pin.

vcc------------5V of arduino

GND----------0V of arduino

SIGNAL(A0) ------A0 of arduino

keep in mind that analog readings that we get from 0-1023 are mapped from 0-100 using the command map(0,1023,100,0)

that means if it is dry---5V-----1023 MAP TO 0%

wet---0V------0 MAP TO 100%


Step 3: Interfacing LCD Screen

i hope you know how to interface a lcd with arduino.if you dont know dont worry i'll guide you to interface it.

take the 16 X 2 lcd screen and connect jumper wires and interface to arduino as follows:

LCD ARDUINO

GND GND

VCC 5V

VEE TO POTENTIOMETER

RS PIN 12(ANY DIGITAL PIN)

R/W GND

EN PIN 11(ANY DIGITAL PIN)

DB4 PIN 5

DB5 PIN 4

DB6 PIN 3

DB7 PIN 2

A 5V

K GND

Step 4: Interfacing 9g Servo Motor

red(+)------------------------------5V in arduino

brown(-)---------------------------gnd in arduino

yellow(signal pin)----------------ANY PWM PIN


Step 5: LED BULBS

you are halfway down to finish your water control system .

interface the red and green LED's to 8 and 9 respectively.(longer end to arduino ,shorter end to GND...hope you did not forgot this)

Step 6: Final Connection

your final connection would look like this

Step 7: The Code

1. Download and Install the Arduino Desktop IDE

windows - https://www.arduino.cc/en/Guide/Windows

Mac OS X - https://www.arduino.cc/en/Guide/MacOSX

Linux - https://www.arduino.cc/en/Guide/Linux

2. Download and paste servo.h and LiquidCrystal.h file to the Arduino libraries folder.

https://github.com/arduino-libraries/Servo

https://github.com/arduino-libraries/LiquidCrysta...

Paste files to the path - C:\Arduino\libraries

3. Download and open flower_plant_project.ino

4. Upload the code to the arduino board via a USB cable

Attachments

Step 8: Done !

you are done with your project.but dont be in a hurry to water your plants ,use a wet handkerchief and check whether its working properly for wet and dry.i think you can modify this further and i will leave it for you to do.

enjoy watering!!!