Controlling GreenHouse From The Arduino

Introduction

In this article, I am going to explain about controlling a greenhouse with the help of Arduino. From this, I am going to check the temperature and humidity in the greenhouse.

What is a greenhouse?

Green house is a glass-based structure or roof made of transparent material. In this greenhouse, we can plant vegetables and flowers naturally. There are installations, heating, cooling, lighting, etc. with which we can monitor the greenhouse by the computer to optimize the conditions for plant growth.

Figure1 - GreenHouse.

Parts Of Lists

Arduino Uno
Relays
DHT11 Sensor [Temperature+Humidity sensor]
LCD
Hook Wires
Bread Board.

Parts Explanation
Relay

A relay is simply an act as the switch, so we can use the relay as the electrical appliances for the circuit.

Figure2 - Relay Box

DHT11 Sensor

DHT11 is a known combination of temperature sensors and humidity sensors.

Temperature sensor

It is used to measure the amount of heat energy or even coldness.
It may be used to detect the analog and digital output.

Humidity sensor

It is a sensor, which is used to sense and measure the percentage of the humidity in the air.
It can also measure air temperature.
Humidity sensor is used for capacitive measurement.
These voltages are the changes, which are converted into a digital reading.

Figure3 - DHT11 Sensor.

LCD Display

LCD is Liquid Crystal Display (LCD).
It can have a flat-panel or an electronic display.
It is used in the hospital, showrooms, buses, railway stations, airports, etc.

Figure4 - LCD Display.

Connection
Step 1

DTH11 Sensor To Arduino Uno

Connect the V to the 5v of the Arduino Uno.
Connect the G to the Gnd of the Arduino UNO.
Connect the S to any input pin of the digital side as u like.

Step 2

LCD Display to Arduino Uno

Fix the LCD in the 16 to 2 on the bread board.
The 16 pin to the Gnd
The 15 pin to the Vcc
The 14 pin to the Digital pin 02
The 13 pin to the Digital pin 03
The 12 pin to the Digital pin 04
The 11 pin to the Digital pin 05
The 01 pin to the Gnd.
The 02 pin to the Vcc.
The 03 pin to the potentiometer.
The 04 pin to the Digital pin 07.
The 05 pin to the Gnd.
The 06 pin to the Digital pin 06.

Programming

#include "DHT.h"
#define DHTPIN 2
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
void setup() {
Serial.begin(9600);
Serial.println("DHTxx test!");
dht.begin();
}
void loop() {
// Wait a few seconds between measurements.
delay(2000);
float h = dht.readHumidity();
// Read temperature as Celsius
float t = dht.readTemperature();
// Read temperature as Fahrenheit
float f = dht.readTemperature(true);
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
float hi = dht.computeHeatIndex(f, h);
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.print(" *C ");
Serial.print(f);
Serial.print(" *F\t");
Serial.print("Heat index: ");
Serial.print(hi);
Serial.println(" *F");
}

Explanation

In this article, I explained the control of the green house effect in the Arduino Uno. It will detect the temperature at the greenhouse in the LCD display. From this, we can monitor the temperature by using the DTH11 sensor in the greenhouse, if the temperature and humidity are not in good condition, it will display in the LCD display.

Output

Figure5 - LCD Display

4 Comments

Join the conversation! Your thoughts help the community grow.

Hadshana Kamalanathan8y ago
Good noe...
Munish A8y ago
Nice article, really amazing application of technology....
Anu V9y ago
Thanks for sharing.. Nice article..
- Sr Karthiga9y ago
  Thank you so much anu vivin sir..................