#include <LiquidCrystal_I2C.h>
#include "TM1637Display.h"
LiquidCrystal_I2C lcd(0x27, 16, 2);
#define led 27
#define buzzer 4
#define  btn 14
#define trig 15
#define Echo 2
#define buzzerb 4
#define red 21 
#define DCLK 13
#define DIO 12
#define green 19
#define blue 18
int duration=0,distance=0;
TM1637Display OurDisplay = TM1637Display(DCLK, DIO);
void setup() {
  OurDisplay.setBrightness(7);
  OurDisplay.clear();
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(led,OUTPUT);
  pinMode(trig, OUTPUT);
  pinMode(btn, INPUT_PULLUP);
  pinMode(Echo, INPUT);
  pinMode(red,OUTPUT);
  pinMode(green,OUTPUT);
  pinMode(blue,OUTPUT);
}
int ultrasonic(){
 digitalWrite(trig,LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig,LOW);
  duration=pulseIn(Echo,HIGH);
  distance=duration*0.034/2;
  return distance;
}

 void loop() 
 {
 Serial.println(ultrasonic());
  if(ultrasonic() < 20)
  {
    digitalWrite(buzzer, HIGH);
  }
  else
  {
    digitalWrite(buzzer, LOW);
  }
  if(digitalRead(btn))
  {
 digitalWrite(led, HIGH);
  }else
  {
    digitalWrite(led, LOW);
  }
  
    OurDisplay.showNumberDecEx(ultrasonic());
  Serial.println(ultrasonic());
  lcd.init();
  lcd.clear();
  lcd.setCursor(1,0);
  lcd.print("Distance of object");
  lcd.setCursor(0,1);
  lcd.print(ultrasonic());
  if(ultrasonic()>0 && ultrasonic()<100){
    digitalWrite(red, HIGH);
    digitalWrite(green, LOW);
    digitalWrite(blue, LOW);
  }
  else if(ultrasonic()>=100 && ultrasonic()<250){
    digitalWrite(red, LOW);
    digitalWrite(green, HIGH);
    digitalWrite(blue, LOW);
  }
  else{
    digitalWrite(red, LOW);
    digitalWrite(green, LOW);
    digitalWrite(blue, HIGH);
    }
}