general_system.ino

#define BLYNK_PRINT Serial   
#include <SPI.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>
#include <DHT.h>
#define BLYNK_PRINT Serial
#include <OneWire.h>
#include <DallasTemperature.h>
#define ONE_WIRE_BUS D2
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

char auth[] = "----------------";               
char ssid[] = "-------";                       
char pass[] = "-------";                        


#define pirPin D1            
int pirValue;                   
int pinValue;                   

#define sensorPin D6 
#define rainPin D5
int sensorState = 0;
int rainState = 0;
int lastState = 0;
int lastRainState = 0;
#define DHTPIN 2    
#define DHTTYPE DHT11     
DHT dht(DHTPIN, DHTTYPE);
SimpleTimer timer;

BLYNK_WRITE(V0)
{
 pinValue = param.asInt();    
} 

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, ssid, pass);
   pinMode(sensorPin, INPUT);
   pinMode(rainPin, INPUT);
   pinMode(pirPin, INPUT);
  dht.begin();

  timer.setInterval(1000L, sendSensor);
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
   sensors.begin();
}
int sensor=0;
void sendTemps()
{
sensor=analogRead(A0);
sensors.requestTemperatures();
float temp = sensors.getTempCByIndex(0); 
Serial.println(temp);
Serial.println(sensor);
Blynk.virtualWrite(V1, temp);
Blynk.virtualWrite(V2,sensor);
delay(1000);
}

void getPirValue(void)        
  {
   pirValue = digitalRead(pirPin);
    if (pirValue) 
     { 
       Serial.println("Motion detected");
       Blynk.notify("Motion detected");  
     }
  }
  
void loop()
{
  Blynk.run(); 
  timer.run(); 
  sendTemps();
sensorState = digitalRead(sensorPin);
Serial.println(sensorState);

if (sensorState == 1 && lastState == 0) {
  Serial.println("needs water, send notification");
  Blynk.notify("Water your plants");
  lastState = 1;
  delay(1000);

    
  } 
  else if (sensorState == 1 && lastState == 1) {
    //do nothing, has not been watered yet
  Serial.println("has not been watered yet");
  delay(1000);
  }
  else {
   
    Serial.println("does not need water");
    lastState = 0;
    delay(1000);
  }



rainState = digitalRead(rainPin);
Serial.println(rainState);

  if (rainState == 0 && lastRainState == 0) {
  Serial.println("Its Raining!");
  Blynk.notify("Its Raining!");
  lastRainState = 1;
  delay(1000);

    
  } 
  else if (rainState == 0 && lastRainState == 1) {
  delay(1000);
  }
  else {
    Serial.println("No Rains");
    lastRainState = 0;
    delay(1000);
  }


  if (pinValue == HIGH)    
      {
        getPirValue();
      }
      Blynk.run();
  delay(100);
}