/*
  HC-SR04 Ultrasonic Sensor Example.

  Turn the LED on when an object is within 100cm range.

  Copyright (C) 2021, Uri Shaked
*/
#include <TM1637Display.h>
#define ECHO_PIN 2
#define TRIG_PIN 3
const int CLK = 13; //Set the CLK pin connection to the display
const int DIO = 12; //Set the DIO pin connection to the display


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

void setup() {
  Serial.begin(115200);
  display.setBrightness(0x0a);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void loop() {
  float distance = readDistanceCM();

  display.showNumberDec(readDistanceCM());
  delay(100);
  // delay(100);
}








// void setup()
// {
//  //set the diplay to maximum brightness  
//                              // Set brightness (0-7):
// }

// void loop()
// {
// for(numCounter = 0; numCounter < 1000; numCounter++) //Iterate numCounter
// {
//  //Display the numCounter value;
// delay(100);
// }
// }