#include "DHT.h"
 
#define RED 4
#define GREEN 5
#define BLUE 6
#define KNOB A0
 
int DHTPIN = 12;
int minTemp = 20;
boolean isDelay = false;
 
#define DHTTYPE DHT22
 
DHT dht(DHTPIN, DHTTYPE);
 
void setup() {
Serial.begin(9600);
dht.begin();
pinMode(RED, OUTPUT);
pinMode(GREEN, OUTPUT);
pinMode(BLUE, OUTPUT);
}
 
void loop() {
 float h = dht.readHumidity();
 float t = dht.readTemperature();
 
 
 Serial.print("Humidity: ");
 Serial.print(h);
 Serial.print(" %\t");
 Serial.print("Temperature: ");
 Serial.print(t);
 Serial.print(" *C ");

 int value = analogRead(KNOB);

 int maxTemp = map(value,0,1024,20,40);

 Serial.print(" %\t");
 Serial.print("maxTemp: ");
 Serial.println(maxTemp);
 
 blink(minTemp, maxTemp, t, BLUE, GREEN, RED);

 if (!isDelay) {
  delay(500);
 }

} 

void blink(int min, int max, int temp, int led1, int led2, int led3) {
  int timeout = 500;
  if (temp <= min){
    timeout = timeout - (min - temp)*20 + 10;
    digitalWrite(led1,HIGH);
    digitalWrite(led2,LOW);
    digitalWrite(led3,LOW);
    if ((min - temp) > 3) {
      isDelay = true;
      delay(timeout);
      digitalWrite(led1,LOW);
      delay(timeout);
    } 
    else {
      isDelay = false;
    }
  } 
  else if(temp > min && temp <= max){
    isDelay = false;
    digitalWrite(led1,LOW);
    digitalWrite(led2,HIGH);
    digitalWrite(led3,LOW);
  } 
  else {
    timeout = timeout - (temp - max)*20 + 10;
    digitalWrite(led1,LOW);
    digitalWrite(led2,LOW);
    digitalWrite(led3,HIGH);
    if ((temp - max) > 3) {
      isDelay = true;
      delay(timeout);
      digitalWrite(led3,LOW);
      delay(timeout);
    }
    else {
      isDelay = false;
    }
  }
}