const int sensorPin = A7;
const int redPin = 2;
const int greenPin = 3;
const int bluePin = 4;
float lastTemperature = -100.0; 

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int analogValue = analogRead(sensorPin);
  float voltage = analogValue * (5.0 / 1023.0);
  float temperatureC = voltage * 100;
  if (temperatureC < 30) {
    setColor(0, 0, 255);  
  } else if (temperatureC >= 30 && temperatureC < 45) {
    setColor(0, 255, 0);  
  } else {
    setColor(255, 0, 0); 
  }

  if (abs(temperatureC - lastTemperature) >= 0.5) {
    Serial.print("Analog Value: ");
    Serial.print(analogValue);
    Serial.print(" ---- Voltage: ");
    Serial.print(voltage, 2);
    Serial.print(" V --- Temperature: ");
    Serial.print(temperatureC, 1);
    Serial.println(" °C");

    lastTemperature = temperatureC;
  }

  delay(500);
}
void setColor(int red, int green, int blue) {
  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);
}