#include <Arduino.h>
#include <main.h>

void setup() {

  UART_SERIAL.begin(9600);
  pinMode(NTC_PIN, INPUT);

}

void loop() {

  uint16_t adcValue = analogRead(NTC_PIN);
  float temperatureCelsius = ntcThermistor(adcValue);
  float temperatureFahrenheit = (temperatureCelsius * 9.0 / 5.0) + 32.0;

  UART_SERIAL.print("อุณหภูมิ: ");
  UART_SERIAL.print(temperatureFahrenheit);
  UART_SERIAL.println(" F");

  delay(1000);
}

float ntcThermistor(uint16_t adcValue) {
  const float R1 = 10000.0;
  const float beta = 3950.0;
  const float T0 = 25.0;

  float Rntc = (R1 * (float)(1023 - adcValue)) / (float)adcValue;

  float temperatureCelsius = 1.0 / (1.0 / T0 + (beta / Rntc) * log(Rntc / R1));
 
  return temperatureCelsius;
}