arduino

#include <math.h>
// Skala:
// c - Celsius
// f - Fahrenheit
int redPin = 2;
int greenPin = 3;
int fotoPin = 5;
int fotoDane;
float B = 4300.0f, T0 = 298.15f, R0 = 50000.0f, R_D = 10000.0f;
float Temperature(int AinPin, char Skala, float B, float T0, float R0, float R_D)
{
  float R,T;
  R=R_D*(1024.0f/float(analogRead(AinPin))-1);
  T=1.0f/(1.0f/T0+(1.0f/B)*log(R/R0));
  switch(Skala)
  {
    case 'c' :
      T = T - 273.15f;
    break;
    case 'f' :
      T = 9.0f*(T-273.15f)/5.0f+32.0f;
    break;
    default:
    break;
  };
  return T;
}
void setup() {
 pinMode(redPin, OUTPUT);
 pinMode(greenPin, OUTPUT);
 Serial.begin(9600);
}
void loop() {

float temp = Temperature(0,'c', B, T0, R0, R_D);

fotoDane = analogRead(fotoPin);
  Serial.print("Oswietlenie = ");
  Serial.println(fotoDane);
  delay(1000);


if(temp<31 && fotoDane > 600)
{
  digitalWrite(greenPin, LOW);
  digitalWrite(redPin, HIGH);
}
else
{
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, HIGH);
}

 Serial.print("Temp:");
 Serial.print(temp);
 Serial.println(" C");
 delay(500);

}