#include <TM1637Display.h>

#define CLK_PIN 2  // CLK pin of TM1637 display
#define DIO_PIN 3  // DIO pin of TM1637 display
#define THERMISTOR_PIN A0  // Analog pin connected to the NTC thermistor

TM1637Display display(CLK_PIN, DIO_PIN);

const int B = 3975;  // Beta value of the thermistor
const uint8_t C[] = {
  SEG_B | SEG_A | SEG_F | SEG_G,
  SEG_A | SEG_D | SEG_E | SEG_F
  };

void setup() {
  Serial.begin(9600);
  display.setBrightness(7);  // Set brightness (0 to 7)
}

void loop() {
  int rawValue = analogRead(THERMISTOR_PIN);

  // Calculate temperature in Celsius
  float resistance = (1023.0 / rawValue) - 1.0;
  resistance = 10000.0 / resistance;
  float temperatureC = 1.0 / (log(resistance / 10000.0) / B + 1.0 / 298.15) - 273.15;

  // Display temperature on TM1637
  display.showNumberDec((float)temperatureC, false, 2, 0);
 display.setSegments(C,2,2);
  delay(1000);  // Update every second
}