#include <TM1637Display.h>

#define CLK 9
#define DIO 10

TM1637Display display = TM1637Display(CLK, DIO);

const uint8_t celsius[] = {
  SEG_A | SEG_B | SEG_F | SEG_G,  // Degree symbol
  SEG_A | SEG_D | SEG_E | SEG_F   // C
};

void setup() {
  display.clear();
  display.setBrightness(7); // set the brightness to 7 (0:dimmest, 7:brightest)
}

void loop() {
  // show counter 0-9
  int i;
  for (i = 0; i < 10; i++) {
    display.showNumberDec(i);
    delay(500);
  display.clear();
  }

  display.showNumberDec(-91);             // displayed _-91
  delay(2000);
  display.clear();

  int temperature = 23; // or read from temperature sensor
  display.showNumberDec(temperature, false, 2, 0);
  display.setSegments(celsius, 2, 2);
  delay(2000);
  display.clear();

}