#include <TM1637.h>

uint8_t dio= 2;
uint8_t CLK= 3;
TM1637 tmDisplay(CLK, dio);

uint8_t echopin= 4;
uint8_t triggPin= 5;
unsigned long duration;
unsigned long distance;
void setup() {
  // put your setup code here, to run once:
 tmDisplay.init();
 tmDisplay.set(BRIGHT_TYPICAL);
 pinMode(echopin, INPUT);
  pinMode(triggPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 digitalWrite(triggPin, LOW);
 delayMicroseconds(5);
 digitalWrite(triggPin, HIGH);
 delayMicroseconds(5);
 digitalWrite(triggPin, LOW);

 duration = pulseIn(echopin, HIGH);
 distance = duration/58.2;

 displayDistance(distance);
 delay(500);
}
 void displayDistance(unsigned long distance) {
  if (distance >= 0 &&  distance <= 9999) {
  tmDisplay.display(0, distance/1000);
 tmDisplay.display(1, (distance % 1000)/100);
 tmDisplay.display(2, (distance % 1000)/10);
 tmDisplay.display(3, (distance % 10));
 }
 else ()
 }