자판기 코드입니다.

lcd 화면엔 계속해서 coin 수와 상품 번호가 뜨고 있으며

원리는 동전을 넣었을 때 초음파 센서가 인식하여 coin수가 증가하고

상품 번호를 선택하면 서보모터가 작동하는 것입니다.

#include <LiquidCrystal.h>
#include <Servo.h>

Servo myservo;
Servo yourservo;
int myangle=90;
int yourangle=90;
long bounceStartTime=0;
long debounce=50;
LiquidCrystal lcd(5,6,7,11,12,13);
int trig=0; //초음파센서의 송신부
int echo=1; //초음파센서의 수신부
int sw1 = 8 ;
int sw2 = 9 ;
int sw3 = 10 ;
//int sw4 = 11 ;
long object ;
int coin;
int ledR=A3;
int ledG=A2;
void setup()
{
 
  Serial.begin(9600);
  pinMode(trig,OUTPUT);
  pinMode(echo,INPUT);
  lcd.begin(16,2);
  lcd.clear();
  myservo.attach(A0);
  yourservo.attach(A1);
  pinMode(sw1, INPUT_PULLUP);
  pinMode(sw2, INPUT_PULLUP);
  pinMode(sw3, INPUT_PULLUP);
 // pinMode(sw4, INPUT_PULLUP);
  pinMode(ledR,OUTPUT);
  pinMode(ledG,OUTPUT);
 
}

void loop()
{
 
  digitalWrite(ledR,HIGH);
  digitalWrite(ledR,LOW);
  delay(500);
  digitalWrite(ledG,HIGH);
  digitalWrite(ledG,LOW);
 
 
  coin = 0 ;
  object=0;
  lcd.setCursor(0,0);
  lcd.print(" coin : ");
  lcd.print(coin);

  lcd.setCursor(0,1);
  lcd.print(" number : ");
  lcd.print(object);

  digitalWrite(trig,LOW);
  digitalWrite(echo,LOW);
  delayMicroseconds(2);
  digitalWrite(trig,HIGH);
  delayMicroseconds(10);
  digitalWrite(trig,LOW);

  unsigned long duration=pulseIn(echo,LOW);
  float distance=duration/29.0/2.0;

  Serial.print(distance);
  Serial.println("cm");

 while(1)
 {
  Serial.print(distance);
  Serial.println("cm");
   if(distance<5.0)
  {
    coin++;
  }
  lcd.setCursor(0,0);
  lcd.print("coin : ");
  lcd.print(coin);
 
  if (digitalRead(sw3) == LOW)
  break;
  }
 
if (digitalRead(sw1) == LOW)
  {
   object=1;
  }
if (digitalRead(sw2) == LOW)
  {
    object=2;
  }
  /*if (digitalRead(sw3) == LOW)
  {
    digitalWrite(object = 3);
  }*/
 
  lcd.setCursor(0,0);
  lcd.print("coin : ");
  lcd.print(coin);
 
  lcd.setCursor(0,1);
  lcd.print("number : ");
  lcd.print(object); //입력 한 물건 숫자 출력

    if(object == 1)
    {myangle +=89 ;}
    else if(object == 2)
    {myangle -= 89;}
    else
    {yourangle += 89;}
 

myservo.write(myangle);
yourservo.write(yourangle);

coin = 0;
bounceStartTime == 0;

delay(3000);

myservo.write(0);
yourservo.write(0);

}