Smart Greenhouse

#define BLYNK_PRINT Serial

#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
#include <DHT.h>
#include "NewPing.h"

// You should get Auth Token in the Blynk App.
char auth[] = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

// This function will run every time Blynk connection is established
BLYNK_CONNECTED() {
  Blynk.syncVirtual(V1, V7);
}

#define W5100_CS  10
#define SDCARD_CS 4

#define DHTaPIN 2
#define DHTbPIN 3
#define DHTaTYPE DHT11     // DHT 11)
#define DHTbTYPE DHT22   // DHT 22 (AM2302), AM2321
DHT dhta(DHTaPIN, DHTaTYPE); // Initialize DHT sensor for normal 16mhz Arduino
DHT dhtb(DHTbPIN, DHTbTYPE); // Initialize DHT sensor for normal 16mhz Arduino

#define TRIGGER_PIN 9
#define ECHO_PIN 8
#define MAX_DISTANCE 50
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
float duration, distance;
int iterations = 5;
float soundsp;  // Stores calculated speed of sound in M/S
float soundcm;  // Stores calculated speed of sound in cm/ms
 
 // Select your pin with physical button-output
const int btn2Pin = 7;
const int btn3Pin = 6;
const int btn4Pin = 4;
const int btn5Pin = 5;
const int btn6Pin = A2;
const int btn7Pin = A4;
WidgetLED led2(V2);
WidgetLED led3(V3);
WidgetLED led4(V4);
WidgetLED led5(V8);
WidgetLED led6(V10);
WidgetLED led7(V0);

BlynkTimer timer;

// V2 LED Widget represents the physical button state
boolean btn2State = false;
void buttonLed2Widget()
{
  // Read button
  boolean isPressed = (digitalRead(btn2Pin) == HIGH);

  // If state has changed...
  if (isPressed != btn2State) {
    if (isPressed) {
      led2.on();
    } else {
      led2.off();
    }
    btn2State = isPressed;
  }
}

// V3 LED Widget represents the physical button state
boolean btn3State = false;
void buttonLed3Widget()
{
  // Read button
  boolean isPressed = (digitalRead(btn3Pin) == HIGH);

  // If state has changed...
  if (isPressed != btn3State) {
    if (isPressed) {
      led3.on();
    } else {
      led3.off();
    }
    btn3State = isPressed;
  }
}

 // V4 LED Widget represents the physical button state
boolean btn4State = false;
void buttonLed4Widget()
{
  // Read button
  boolean isPressed = (digitalRead(btn4Pin) == HIGH);

  // If state has changed...
  if (isPressed != btn4State) {
    if (isPressed) {
      led4.on();
    } else {
      led4.off();
    }
    btn4State = isPressed;
  }
}

 // V5 LED Widget represents the physical button state
boolean btn5State = false;
void buttonLed5Widget()
{
  // Read button
  boolean isPressed = (digitalRead(btn5Pin) == HIGH);

  // If state has changed...
  if (isPressed != btn5State) {
    if (isPressed) {
      led5.on();
    } else {
      led5.off();
    }
    btn5State = isPressed;
  }
}
// V6 LED Widget represents the physical button state
boolean btn6State = false;
void buttonLed6Widget()
{
  // Read button
  boolean isPressed = (digitalRead(btn6Pin) == HIGH);

  // If state has changed...
  if (isPressed != btn6State) {
    if (isPressed) {
      led6.on();
    } else {
      led6.off();
    }
    btn6State = isPressed;
  }
}

// V7 LED Widget represents the physical button state
boolean btn7State = false;
void buttonLed7Widget()
{
  // Read button
  boolean isPressed = (digitalRead(btn7Pin) == HIGH);

  // If state has changed...
  if (isPressed != btn7State) {
    if (isPressed) {
      led7.on();
    } else {
      led7.off();
    }
    btn7State = isPressed;
  }
}


// Variable Definitions
float temp_internal;    // Stores internal temperature value
float hum_internal;     // Stores internal humidity value
float temp_external;    // Stores external temperature value
float hum_external;     // Stores external humidity value
int state;              // Condition of pins
int valMoisture = 0;    // Stores Moisture value
int LimM = 25;       // Stores value after edit
int LimT = 22;         // Stores value after edit
float hysteresis = 0.4;

//pin definitions
int MoisturePin = A0;   // Moisture Analog pin
int Relay4_AirIn = 4;   // airRelay4 Blower Air Fan IN
int Relay3_AirOut = 5;  // airRelay3 Blower Air Fan OUT
int Relay2_Lamp = 6;    // Relay2 Hot Lamp
int Relay1_Water = 7;   // Relay1 Water Pump

int fire = A4; //virtual pin for led
int fire2 = A3; //buzzer,pumb
int smokeA0 = A5; //analog input



BLYNK_WRITE(V1){
   LimT = param.asInt();   //write temp from slider
}


BLYNK_WRITE(V7){
   LimM = param.asInt();   //write hum from slider
}

void soil()
{Blynk.virtualWrite(V9, valMoisture);}

void temp ()
  {Blynk.virtualWrite(V11, hum_external);
  Blynk.virtualWrite(V12, temp_external);}


void sendSensor()
{
  float h = dhta.readHumidity();     //read from DHT11 
  float t = dhta.readTemperature(); 

  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT11 sensor!");
    return;
  }
  
  Blynk.virtualWrite(V5, h);
  Blynk.virtualWrite(V6, t);
}
/*
 * PIR sensor 
 */
 
int ledPin = A2;                // choose the pin for the LED
int inputPin = A1;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status

void myDistance()
 {
 Blynk.virtualWrite(V13,distance);// virtualpin 13 distance
 }
 

void setup()
{
  // Debug console
  Serial.begin(9600);
                              
 pinMode(SDCARD_CS, OUTPUT);
 digitalWrite(SDCARD_CS, HIGH); // Deselect the SD card


  Blynk.begin(auth);


  dhta.begin();
  dhtb.begin();

 pinMode(smokeA0, INPUT); 
 pinMode(fire, OUTPUT);
 pinMode(fire2, OUTPUT);

 digitalWrite(fire, LOW);
 digitalWrite(fire2, LOW);
 // Setup a function to be called every second
   
 timer.setInterval(1000L, sendSensor);
 timer.setInterval(1000L, temp);
 timer.setInterval(1000L, myDistance);
  //LEDS
    pinMode(btn2Pin, INPUT_PULLUP);
  timer.setInterval(1000L, buttonLed2Widget); 
    
    pinMode(btn3Pin, INPUT_PULLUP);
  timer.setInterval(1000L, buttonLed3Widget);  
  
   pinMode(btn4Pin, INPUT_PULLUP);
  timer.setInterval(1000L, buttonLed4Widget);
  
   pinMode(btn5Pin, INPUT_PULLUP);
  timer.setInterval(1000L, buttonLed5Widget);

   pinMode(btn6Pin, INPUT_PULLUP);
  timer.setInterval(500L, buttonLed6Widget);
  
   pinMode(btn7Pin, INPUT_PULLUP);
  timer.setInterval(1000L, buttonLed7Widget);

  
  timer.setInterval(1000L, soil);

  pinMode(ledPin, OUTPUT);      // declare LED as output pir
  pinMode(inputPin, INPUT);     // declare sensor as input pir
   

  // Initialize Relays
  pinMode(Relay4_AirIn, OUTPUT);
  pinMode(Relay3_AirOut, OUTPUT);
  pinMode(Relay2_Lamp, OUTPUT);
  pinMode(Relay1_Water, OUTPUT);

  digitalWrite(Relay4_AirIn, LOW);
  digitalWrite(Relay3_AirOut, LOW);
  digitalWrite(Relay2_Lamp, LOW);
  digitalWrite(Relay1_Water, LOW);

}
void loop()
{
  Blynk.run();
  timer.run();
  
//SMOKE
  int analogSensor = analogRead(smokeA0);

  Serial.print("Pin A5: ");
  Serial.println(analogSensor);
  // Checks if it has reached the threshold value
 if (analogSensor >= 500) {
    digitalWrite(fire, HIGH);
    digitalWrite(fire2, HIGH);
  }
  else {
    digitalWrite(fire, LOW);
    digitalWrite(fire2, LOW);
      }
  
   // Read data from Sensors

  // 1. Read data from Internal Sensor and store it to variables temp_internal and hum_internal
  hum_internal = dhta.readHumidity();
  temp_internal = dhta.readTemperature();
  
  // 2. Read data from DHT22 and store it to variables hum and temp
  hum_external = dhtb.readHumidity();
  temp_external = dhtb.readTemperature();

 
  valMoisture = ( analogRead(MoisturePin)) ;
  valMoisture = map(valMoisture,980,250,0,100); //map for % moisture

 //temp and hum add to calculate sound of speed
  soundsp = 331.4 + (0.606 * temp_internal) + (0.0124 * hum_internal);
    
    // Convert to cm/ms
    
    soundcm = soundsp / 10000;
    duration = sonar.ping_median(iterations);
       
  // Calculate the distance
  distance = 13 - (duration / 2) * soundcm;

//distance = 10-(duration/2)*0.0343;
  
  // ***************************************************************************

 // Print on Serial Window readed values
  state = digitalRead(Relay4_AirIn);
  Serial.print("Air In = ");
  Serial.println(state);
  state = digitalRead(Relay3_AirOut);
  Serial.print("Air Out = ");
  Serial.println(state);
  state = digitalRead(Relay2_Lamp);
  Serial.print("Lamp = ");
  Serial.println(state);
  state = digitalRead(Relay1_Water);
  Serial.print("Water = ");
  Serial.println(state);
  Serial.println("");
  Serial.print("Temperature set = ");
  Serial.println(LimT);
  Serial.print("Soil humidity set = ");
  Serial.println(LimM);
  
  // ***************************************************************************
  // 1. Check limit value for Moisture Soil Sensor and control Relay1_Water
  Serial.print("Soil: ");
  Serial.println(valMoisture);
  
  if (valMoisture <= LimM) {
    digitalWrite(Relay1_Water, HIGH);
    
  }
  else {
    digitalWrite(Relay1_Water, LOW);
      }

  // 2. Check greenhouse's Internal Condition and control Relays of Fans & Hot Lamp 
  //  > LimT + hysteresis
  if (temp_internal > LimT + hysteresis) {
    if (temp_internal > temp_external) {
            
      state = digitalRead(Relay4_AirIn);
      if (state == 1) {
        // do nothing
      }
      else {
        digitalWrite(Relay4_AirIn, HIGH);
      }

           state = digitalRead(Relay3_AirOut);
      if (state == 1) {
        // do nothing
      }
      else {
        digitalWrite(Relay3_AirOut, HIGH);
      }

      
      state = digitalRead(Relay2_Lamp);
      if (state == 0) {
        // do nothing
      }
      else {
        digitalWrite(Relay2_Lamp, LOW);
      }
    }
    else {
           
      state = digitalRead(Relay4_AirIn);
      if (state == 0) {
        // do nothing
      }
      else {
        digitalWrite(Relay4_AirIn, LOW);
      }
     
      state = digitalRead(Relay3_AirOut);
      if (state == 1) {
        // do nothing
      }
      else {
        digitalWrite(Relay3_AirOut, HIGH);
      }

      
      state = digitalRead(Relay2_Lamp);
      if (state == 0) {
        // do nothing
      }
      else {
        digitalWrite(Relay2_Lamp, LOW);
      }
    }
  }
////LimT - hysteresis
  if (temp_internal < LimT - hysteresis) {
    if (temp_internal < temp_external) {
           
      if (state == 1) {
        // do nothing
      }
      else {
        digitalWrite(Relay4_AirIn, HIGH);
      }

      
      state = digitalRead(Relay3_AirOut);
      if (state == 0) {
        // do nothing
      }
      else {
        digitalWrite(Relay3_AirOut, LOW);
      }

      
      state = digitalRead(Relay2_Lamp);
      if (state == 1) {
        // do nothing
      }
      else {
        digitalWrite(Relay2_Lamp, HIGH);
      }
    }
    else {
           
      state = digitalRead(Relay4_AirIn);
      if (state == 0) {
        // do nothing
      }
      else {
        digitalWrite(Relay4_AirIn, LOW);
      }

      
      state = digitalRead(Relay3_AirOut);
      if (state == 0) {
        // do nothing
      }
      else {
        digitalWrite(Relay3_AirOut, LOW);
      }

      
      state = digitalRead(Relay2_Lamp);
      if (state == 1) {
        // do nothing
      }
      else {
        digitalWrite(Relay2_Lamp, HIGH);
      }
     }
    }
      //pir code
  
  { val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, HIGH);  // turn LED ON
    if (pirState == LOW) {
    pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW); // turn LED OFF
    if (pirState == HIGH){
    pirState = LOW;}}}
 }