#include <DHT.h>
int dht_pin = 2;    
#include <Adafruit_NeoPixel.h> 
int neo_pin = 9;
int no_of_leds = 16;
Adafruit_NeoPixel strip = Adafruit_NeoPixel(no_of_leds, neo_pin);
DHT dht(dht_pin, DHT22);
void setup() 
{
  Serial.begin(9600);
  Serial.println(" Humidity and Temperature Test!");
  dht.begin();
  strip.begin();
}
void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  if (humidity<45 && temperature<45)
  {
      Set_color(strip.Color(0, 255, 0)); 
      delay(500);
  } 
  else 
  {
    Set_color(strip.Color(255, 0, 0));
    delay(500);
  } 
  Serial.print(" Humidity: ");
  Serial.print(humidity);
  Serial.print("%  Temperature in °C: ");
  Serial.println(temperature);
  }
 int Set_color(uint32_t col)
 {
  for(int i=0; i<no_of_leds; i++ ) 
  {   
      strip.setPixelColor(i , col); 
      strip.show();
      delay(500);
  }
}