// Is the TM1637_RT library compatible with a ESP32?
// Answer: Yes
//
// Library: "TM1637_RT", https://github.com/RobTillaart/TM1637_RT

#include <TM1637.h>

TM1637 TM;

unsigned long previousMillis;
const unsigned long interval = 1000UL;
unsigned int count;

void setup()
{
  TM.begin(16, 15, 4);     //  clockpin, datapin, #digits
  TM.displayClear();
  TM.setBrightness(7);     // full brightness, default is 3
}

void loop()
{
  unsigned long currentMillis = millis();

  if( currentMillis - previousMillis >= interval)
  {
    previousMillis += interval; // for a clock-accurate millis timer

    TM.displayInt(count); // display the count value
    count++;
  }

  delay(10);   // speed up simulation, does not influence millis
}