infra-temp.java

#include <FastLED.h>

#define NUM_LEDS 10
#define DATA_PIN 2

CRGB leds[NUM_LEDS];

void setup() {
  Serial.begin(9600);
  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
}

void loop() {
  unsigned int ADC_Value = analogRead(A3);
  float temp = ((double)ADC_Value * 450 / 614.4 - 70);
  displayTemp(temp);
  Serial.print(temp);
  Serial.println("\u2103");//Printed temperature value
  delay(10);
  clearLeds();
}

void clearLeds(){
  for(int i = 0; i < NUM_LEDS; i++){
    leds[i] = CRGB::Black;
  }
}

void displayTemp(float temp) {
  if (temp > 25) {
    leds[0] = CRGB::Blue;    
  }
  if (temp > 30) {
    leds[1] = CRGB::Blue;
  }
  if (temp > 37) {
    leds[2] = CRGB::Green;    
  }
  if (temp > 39) {
    leds[3] = CRGB::Green;
  }
  if (temp > 41) {
    leds[4] = CRGB::Yellow;
  }
  if (temp > 43) {
    leds[5] = CRGB::Yellow;
  }
  if (temp > 45) {
    leds[6] = CRGB::Orange;
  }
  if (temp > 47) {
    leds[7] = CRGB::Orange;
  }
  if (temp > 49) {
    leds[8] = CRGB::Red;
  }
  if (temp > 50) {
    leds[9] = CRGB::Red;
  }
  FastLED.show();
}