#define NTC_PIN PA1

#define SERIES_RESISTOR 10000.0   // 10kΩ
#define NOMINAL_RESISTANCE 10000.0
#define NOMINAL_TEMPERATURE 25.0  // °C
#define BETA_COEFFICIENT 3950.0

void setup(void) {
  Serial.begin(9600);
}

void loop(void) {
  int adcValue = analogRead(NTC_PIN);

  // Convert ADC value to resistance
  float voltageRatio = (float)adcValue / 4095.0;
  float ntcResistance = SERIES_RESISTOR * voltageRatio / (1.0 - voltageRatio);

  // Steinhart–Hart (Beta equation)
  float temperature;
  temperature = ntcResistance / NOMINAL_RESISTANCE;     
  temperature = log(temperature);                       
  temperature /= BETA_COEFFICIENT;                      
  temperature += 1.0 / (NOMINAL_TEMPERATURE + 273.15);  
  temperature = 1.0 / temperature;                     
  temperature -= 273.15;                               

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  delay(1000);
}