#include "DHT.h"
#define DHTPIN1 2
#define DHTPIN2 3
#define DHTPIN3 4
#define DHTTYPE DHT11   // DHT 11

#define FAN1 5
#define FAN2 6
#define FAN3 7

#define EXHAUST1 8
#define EXHAUST2 9
#define EXHAUST3 10

#define LIGHT 11

int i=0;

DHT dht1(DHTPIN1, DHTTYPE);
DHT dht2(DHTPIN2, DHTTYPE);
DHT dht3(DHTPIN3, DHTTYPE);

void setup() {
  
  Serial.begin(9600);
  dht1.begin();
  dht2.begin();
  dht3.begin();

  pinMode(FAN1, OUTPUT);
  pinMode(FAN2, OUTPUT);
  pinMode(FAN3, OUTPUT);

  pinMode(EXHAUST1, OUTPUT);
  pinMode(EXHAUST2, OUTPUT);
  pinMode(EXHAUST3, OUTPUT);

  pinMode(LIGHT, OUTPUT);

}
void loop() {
  delay(2000);

  float h1 = dht1.readHumidity();
  float h2 = dht2.readHumidity();
  float h3 = dht3.readHumidity();
  // Read temperature as Celsius (the default)
  float t1 = dht1.readTemperature();
  float t2 = dht2.readTemperature();
  float t3 = dht3.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f1 = dht1.readTemperature(true);
  float f2 = dht2.readTemperature(true);
  float f3 = dht3.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h1) ||isnan(h2) ||isnan(h3) || isnan(t1) || isnan(t2) || isnan(t3) || isnan(f1) || isnan(f2) || isnan(f3)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  float H=(h1+h2+h3)/3;
  float T=(t1+t2+t3)/3;
  float F=(f1+f2+f3)/3;

  if(0<H && H<10){
    digitalWrite(FAN1, LOW);
    digitalWrite(EXHAUST1, LOW);
    digitalWrite(FAN2, LOW);
    digitalWrite(EXHAUST2, LOW);
    digitalWrite(FAN3, LOW);
    digitalWrite(EXHAUST3, LOW);}
  if(11<H && H<20){
    digitalWrite(FAN1, HIGH);
    digitalWrite(EXHAUST1, HIGH); 
    digitalWrite(FAN2, LOW);
    digitalWrite(EXHAUST2, LOW);
    digitalWrite(FAN3, LOW);
    digitalWrite(EXHAUST3, LOW);}
  if(21<H && H<30){
    digitalWrite(FAN1, HIGH);
    digitalWrite(EXHAUST1, HIGH);
    digitalWrite(FAN2, HIGH);
    digitalWrite(EXHAUST2, HIGH);
    digitalWrite(FAN3, LOW);
    digitalWrite(EXHAUST3, LOW);}
  if(H>31){
    digitalWrite(FAN1, HIGH);
    digitalWrite(EXHAUST1, HIGH);
    digitalWrite(FAN2, HIGH);
    digitalWrite(EXHAUST2, HIGH);
    digitalWrite(FAN3, HIGH);
    digitalWrite(EXHAUST3, HIGH);}


  Serial.print(("Humidity1: "));
  Serial.print(H);
  /*Serial.print(F("%  Temperature: "));
  Serial.print(t1);
  Serial.print(("°C "));
  Serial.print(f1);
  Serial.print(("°F "));*/
  Serial.println();
}