Smart Irrigation System using Arduino | DHT11 | Moisture

This system measures the Soil Moisture, Soil Humidity & Surrounding Temperature & works accordingly.

Jun 27, 2021

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Devices & Components

Arduino Uno Rev3

Breadboard (generic)

Alphanumeric LCD, 16 x 2

Resistor 1k ohm

Water Pump

Signal Relay, 5 VDC

Li-Ion Battery 1000mAh

DHT11 Temperature & Humidity Sensor (3 pins)

SparkFun Soil Moisture Sensor (with Screw Terminals)

Jumper wires (generic)

Software & Tools

Arduino IDE

Project description

Code

Code for Smart Irrigation

1//Welcome to Electronics University
2//Subscribe us if you want to learn   something new.
3
4#include <dht.h>
5#include <LiquidCrystal.h>
6
7LiquidCrystal   lcd(7,8,9,10,11,12);
8
9dht DHT;
10
11#define DHT11_PIN 5
12
13int sensor_pin   = A0; // Soil Sensor input at Analog PIN A0
14int output_value ;
15int relayPin   = 6;
16
17void setup(){
18  lcd.begin(16, 2);
19  pinMode(sensor_pin, INPUT);
20   pinMode(relayPin, OUTPUT);
21}
22
23void loop(){
24  int chk = DHT.read11(DHT11_PIN);
25   lcd.setCursor(0,0); 
26  lcd.print("Temp: ");
27  lcd.print(DHT.temperature);
28   lcd.print((char)223);
29  lcd.print("C");
30  
31  lcd.setCursor(0,1); 
32   lcd.print("Humidity: ");
33  lcd.print(DHT.humidity);
34  lcd.print("%");
35   delay(2000);
36  
37  lcd.setCursor(23,0);
38  lcd.autoscroll();
39  output_value=   analogRead(sensor_pin);
40  output_value = map(output_value,550,10,0,100);
41   lcd.print("Mositure: ");
42  lcd.print(output_value);
43  lcd.print("%");
44   
45  lcd.setCursor(23,1);
46  if(output_value<30){
47  digitalWrite(relayPin,   LOW);
48  lcd.print("Motor ON");
49 }
50 else
51 {
52  digitalWrite(relayPin,   HIGH);
53  lcd.print("Motor OFF");       
54 }
55  
56  delay(2500);
57  lcd.noAutoscroll();
58   lcd.clear();
59}
60

//Welcome to Electronics University
//Subscribe us if you want to learn   something new.

#include <dht.h>
#include <LiquidCrystal.h>

LiquidCrystal   lcd(7,8,9,10,11,12);

dht DHT;

#define DHT11_PIN 5

int sensor_pin   = A0; // Soil Sensor input at Analog PIN A0
int output_value ;
int relayPin   = 6;

void setup(){
  lcd.begin(16, 2);
  pinMode(sensor_pin, INPUT);
   pinMode(relayPin, OUTPUT);
}

void loop(){
  int chk = DHT.read11(DHT11_PIN);
   lcd.setCursor(0,0); 
  lcd.print("Temp: ");
  lcd.print(DHT.temperature);
   lcd.print((char)223);
  lcd.print("C");
  
  lcd.setCursor(0,1); 
   lcd.print("Humidity: ");
  lcd.print(DHT.humidity);
  lcd.print("%");
   delay(2000);
  
  lcd.setCursor(23,0);
  lcd.autoscroll();
  output_value=   analogRead(sensor_pin);
  output_value = map(output_value,550,10,0,100);
   lcd.print("Mositure: ");
  lcd.print(output_value);
  lcd.print("%");
   
  lcd.setCursor(23,1);
  if(output_value<30){
  digitalWrite(relayPin,   LOW);
  lcd.print("Motor ON");
 }
 else
 {
  digitalWrite(relayPin,   HIGH);
  lcd.print("Motor OFF");       
 }
  
  delay(2500);
  lcd.noAutoscroll();
   lcd.clear();
}

Code for Smart Irrigation

1//Welcome to Electronics University
2//Subscribe us if you want to learn  something new.
3
4#include <dht.h>
5#include <LiquidCrystal.h>
6
7LiquidCrystal  lcd(7,8,9,10,11,12);
8
9dht DHT;
10
11#define DHT11_PIN 5
12
13int sensor_pin  = A0; // Soil Sensor input at Analog PIN A0
14int output_value ;
15int relayPin  = 6;
16
17void setup(){
18  lcd.begin(16, 2);
19  pinMode(sensor_pin, INPUT);
20  pinMode(relayPin, OUTPUT);
21}
22
23void loop(){
24  int chk = DHT.read11(DHT11_PIN);
25  lcd.setCursor(0,0); 
26  lcd.print("Temp: ");
27  lcd.print(DHT.temperature);
28  lcd.print((char)223);
29  lcd.print("C");
30  
31  lcd.setCursor(0,1); 
32  lcd.print("Humidity: ");
33  lcd.print(DHT.humidity);
34  lcd.print("%");
35  delay(2000);
36  
37  lcd.setCursor(23,0);
38  lcd.autoscroll();
39  output_value=  analogRead(sensor_pin);
40  output_value = map(output_value,550,10,0,100);
41  lcd.print("Mositure: ");
42  lcd.print(output_value);
43  lcd.print("%");
44  
45  lcd.setCursor(23,1);
46  if(output_value<30){
47  digitalWrite(relayPin,  LOW);
48  lcd.print("Motor ON");
49 }
50 else
51 {
52  digitalWrite(relayPin,  HIGH);
53  lcd.print("Motor OFF");       
54 }
55  
56  delay(2500);
57  lcd.noAutoscroll();
58  lcd.clear();
59}
60

//Welcome to Electronics University
//Subscribe us if you want to learn  something new.

#include <dht.h>
#include <LiquidCrystal.h>

LiquidCrystal  lcd(7,8,9,10,11,12);

dht DHT;

#define DHT11_PIN 5

int sensor_pin  = A0; // Soil Sensor input at Analog PIN A0
int output_value ;
int relayPin  = 6;

void setup(){
  lcd.begin(16, 2);
  pinMode(sensor_pin, INPUT);
  pinMode(relayPin, OUTPUT);
}

void loop(){
  int chk = DHT.read11(DHT11_PIN);
  lcd.setCursor(0,0); 
  lcd.print("Temp: ");
  lcd.print(DHT.temperature);
  lcd.print((char)223);
  lcd.print("C");
  
  lcd.setCursor(0,1); 
  lcd.print("Humidity: ");
  lcd.print(DHT.humidity);
  lcd.print("%");
  delay(2000);
  
  lcd.setCursor(23,0);
  lcd.autoscroll();
  output_value=  analogRead(sensor_pin);
  output_value = map(output_value,550,10,0,100);
  lcd.print("Mositure: ");
  lcd.print(output_value);
  lcd.print("%");
  
  lcd.setCursor(23,1);
  if(output_value<30){
  digitalWrite(relayPin,  LOW);
  lcd.print("Motor ON");
 }
 else
 {
  digitalWrite(relayPin,  HIGH);
  lcd.print("Motor OFF");       
 }
  
  delay(2500);
  lcd.noAutoscroll();
  lcd.clear();
}

Downloadable files

Connection of LCD with Arduino

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