Arduino intelligent agricultural system with blynk(IOT)

 
#define TRIGGER 4
#define ECHO    5
#define LED     12
#define BLYNK_PRINT Serial
#include <Adafruit_Sensor.h>
#include <SPI.h>
#include <Ethernet.h>
#include <DHT.h>
#include <BlynkSimpleEthernet.h>

char auth[] = "TOKEN";

#define W5100_CS  10
#define SDCARD_CS 4
#define DHTPIN 2  
#define DHTTYPE DHT11 
DHT dht(DHTPIN, DHTTYPE);
BlynkTimer timer;
WidgetLCD lcd(V8);
int n;
int n1;
void sendSensor()
{
  float h = dht.readHumidity();
  float t = dht.readTemperature(); 

  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  Blynk.virtualWrite(V5, h);
  Blynk.virtualWrite(V6, t);
  
}

void setup()
{
  Serial.begin(9600);
   Blynk.begin(auth);
    dht.begin();

  timer.setInterval(1000L, sendSensor);

  pinMode(SDCARD_CS, OUTPUT);
  digitalWrite(SDCARD_CS, HIGH);
 pinMode(TRIGGER, OUTPUT);
  pinMode(ECHO, INPUT); 
  pinMode(LED,OUTPUT);
  pinMode(7,OUTPUT);
  pinMode(11,OUTPUT);
  pinMode(13,OUTPUT);
  pinMode(8,OUTPUT);
  
   
  lcd.clear(); 
  lcd.print(2, 0,"  ANNAMALI "); 
  lcd.print(2, 1," UNVERSITY ");
  timer.setInterval(500L, sendUptime);
  timer.setInterval(500L, sendUptime1);

  Blynk.begin(auth);
}
void sendUptime()
{
  Blynk.virtualWrite(V14, n);
  }
void sendUptime1()
{
  Blynk.virtualWrite(V15, n1);
  }
  


void loop()
{

  n=analogRead(A0);
  Serial.println(n);
  n1=analogRead(A1);
  Serial.println(n1);

    if(n>700)
  {
     digitalWrite(7,LOW); 
     digitalWrite(13,LOW); 
     
                                                                                                                            
       
  }
  
  if(n<700)
  {
      digitalWrite(7,HIGH );
      digitalWrite(13,HIGH );

  }
  
  else if(n1>600)
  {
     digitalWrite(11,LOW);
     digitalWrite(13,LOW);
     
  }
  
  if(n1<600)
  {
      digitalWrite(11,HIGH );
        digitalWrite(13,HIGH);

  }






  
  long duration, distance;
  digitalWrite(TRIGGER, LOW);  
  delayMicroseconds(2); 
  
  digitalWrite(TRIGGER, HIGH);
  delayMicroseconds(10); 
  
  digitalWrite(TRIGGER, LOW);
  duration = pulseIn(ECHO, HIGH);
  distance = (duration/2) / 29.1;

   if (distance <= 50) {
    Blynk.virtualWrite(V0, 255);
}
  else {
    Blynk.virtualWrite(V0, 0);
  }

 if (distance <= 40) {
    Blynk.virtualWrite(V1, 255);
}
  else {
    Blynk.virtualWrite(V1, 0);
  }

   if (distance <= 30) {
    Blynk.virtualWrite(V2, 255);
}
  else {
    Blynk.virtualWrite(V2, 0);
  }

   if (distance <= 20) {
    Blynk.virtualWrite(V3, 255);
  
}
  else {
    Blynk.virtualWrite(V3, 0);
  }

   if (distance <= 15) {
    Blynk.virtualWrite(V4, 255);
}
  else {
    Blynk.virtualWrite(V4, 0);
  }

   if (distance <=15) {
  digitalWrite(LED, HIGH);
  lcd.clear(); 
  lcd.print(1, 0,"WATER TANK FULL ");
  lcd.print(1, 1," MOTOR TURN OFF ");
 delay(3000); 
   }
   
   
   if (distance >=44 ) {
  digitalWrite(LED, LOW);
  lcd.clear(); 
  lcd.print(2, 0,"WATER TANK LOW "); 
  lcd.print(1, 1,"Motor TURN ON ");
  delay(2000);
   }
  
   
  Serial.print(distance);
  Serial.println("Centimeter:");
  Blynk.virtualWrite(V9, distance);
  delay(200);
  Blynk.run();
   timer.run();
  
}