nodemcu+tm1637.ino

#include <TM1637Display.h>


const int CLK = D6; //Set the CLK pin connection to the display
const int DIO = D5; //Set the DIO pin connection to the display

 int numCounter = 0;
 
TM1637Display display(CLK, DIO); //set up the 4-Digit Display.
 

void setup() {
  // put your setup code here, to run once:
 display.setBrightness(0x0a);
}

void loop() {
  // put your main code here, to run repeatedly:
 for(numCounter = 0; numCounter < 1000; numCounter++) //Iterate numCounter
 {
 display.showNumberDec(numCounter); //Display the numCounter value;
 delay(1000);
 }
}