#include <LiquidCrystal.h>
#include "DHT.h"
LiquidCrystal lcd(2, 3, 4, 5, 6,7);
const int relay_Pin = 8;
const int DHT11_Sesnor = 9;
const int moisture_sensor = A0;
const int rain_Sesnor = A1;
#define DHTTYPE DHT11
int moisture_sensor_value;
int rain_Sesnor_value;
float humudity_value,temprature_value;
DHT dht(DHT11_Sesnor, DHTTYPE);
void setup() {
Serial.begin(9600);
pinMode(relay_Pin, OUTPUT);
lcd.begin(16, 2);
lcd.print("Smart Irrigation ");
lcd.setCursor(0,2);
lcd.print(" SYSTEM");
digitalWrite(relay_Pin, LOW);
dht.begin();
delay(2000);
}
void loop()
{
readDTH11_Sesnor();
moisture_level_detected();
water_motor_start();
}
void readDTH11_Sesnor()
{
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
humudity_value = dht.readHumidity();
// Read temperature as Celsius (the default)
temprature_value = dht.readTemperature();
// Check if any reads failed and exit early (to try again).
if (isnan(humudity_value) || isnan(temprature_value)) {
Serial.println(("Failed to read from DHT sensor!"));
return;
}
Serial.print((" Humidity: "));
Serial.print(humudity_value);
Serial.print(("%"));
lcd.clear();
lcd.print("Humidity %: ");
lcd.setCursor(0,2);
lcd.print(humudity_value);
Serial.print("\n");
delay(1000);
Serial.print(("Temperature: "));
Serial.print(temprature_value);
Serial.print(("C "));
lcd.clear();
lcd.print("Temperature degCel");
lcd.setCursor(0,2);
lcd.print(temprature_value);
Serial.print("\n");
delay(1000);
}
void moisture_level_detected()
{
moisture_sensor_value = analogRead(moisture_sensor);
Serial.println("Moisture Level : ");
Serial.println(moisture_sensor_value);
lcd.clear();
lcd.print("Moisture Level :");
lcd.setCursor(0,2);
lcd.print(moisture_sensor_value);
delay(2000);
}
void water_motor_start()
{
rain_Sesnor_value = analogRead(rain_Sesnor);
Serial.print("rain sensor value :: ");
Serial.println(rain_Sesnor_value);
delay(1000);
if(rain_Sesnor_value > 700)
{
if(moisture_sensor_value > 700 )
{
digitalWrite(relay_Pin, HIGH);
delay(2000);
}
else
{
digitalWrite(relay_Pin, LOW);
delay(2000);
}
}
else
{
digitalWrite(relay_Pin, LOW);
delay(2000);
}
}
how do i add this into the main code above......?
When soil moisture <= 800 the soil is considered to be WET soil else the soil is considered to be DRY soil.
When the temperature is <= 27 degrees C, it is considered LOW temperature else its HIGH temperature.
When the humidity is <= 40%, it’s considered Low Humidity else anything above that is considered HIGH.
When the soil moisture is > 800, the Temperature is <=27 degrees C, and the Humidity is Low/High the water pump should be turned ON to irrigate the crops
If the temperature is >27 degrees C, the soil is considered wet and the Humidity is high/Low the water pump remains turned OFF.
If the Temperature is >27 degrees C, the soil is considered dry and the Humidity is high/low the water pump remains OFF as the temperature is too high to irrigate crops.
If the soil moisture is < 800, Wet soil, no matter what the temperature and humidity are, the water pump remains OFF.