IoT 보안장치 양성자과정 프로젝트 예제 [1]

설치 필요한 라이브러리

LiquidCrystal_I2C 라이브러리
MFRC 라이브러리 추가

#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <SPI.h>
#include <MFRC522.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

#define RST_PIN 5
#define SS_PIN 15

MFRC522 mfrc522(SS_PIN, RST_PIN);
int select;

typedef struct product{
  char buffName[20];
  int buffprice;  
}product;

product productList[7] = { //구조체 추가 및 변경
  {"3D Printer", 230000},
  {"Arduino Starter Kit", 110000},
  {"LG Gram 2020", 1799000},
  {"MacBook Pro CTO", 3120000},
  {"4k Monitor", 399000},
  {"7.1ch Speakers", 1684300},
  {"Desk & Chair", 362650}
};

struct account{
  String name_;
  String authority;
  int totalPrice;
  String recent5Namelog[5];
  int recent5Pricelog[5];
};

struct account Master = {"MakeItNow","Admin",0,{},{}};


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  SPI.begin();
  Wire.begin(2, 0);
  lcd.begin();
  mfrc522.PCD_Init();
  Serial.println(" ");
  Serial.println("카드를 리더기에 가까이 대 주세요");
  Serial.println();
  pinMode(A0,INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  select = map(analogRead(A0),0,1023,0,6);
  lcd.setCursor(0,0);
  lcd.print(productList[select].buffName);
  lcd.print("        ");
  lcd.setCursor(0,1);
  lcd.print(productList[select].buffprice);
  lcd.print("            ");
  
  if(!mfrc522.PICC_IsNewCardPresent()){
    return;
  }
  if(!mfrc522.PICC_ReadCardSerial()){
    return;
  }
  
  
  Serial.println("\n----------------------------");
  Serial.print("\nUID tag : ");
  String content= "";
  byte letter;
  for(byte i = 0; i < mfrc522.uid.size; i++){
    Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
    Serial.print(mfrc522.uid.uidByte[i],HEX);
    content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
    content.concat(String(mfrc522.uid.uidByte[i], HEX));
  }
  content.toUpperCase();
  Serial.println();

  if(content.substring(1) == "E9 6E 0E 5D"){ //UID 변경 필수
    Serial.println("승인된 카드입니다.\n");
    Serial.print("User Name : ");
    Serial.println(Master.name_);
    Serial.print("Authority : ");
    Serial.println(Master.authority);
    if( (Master.recent5Namelog[0]) && (Master.recent5Pricelog[0]) ){
      for(int i = 3; i>=0; i--){
        Master.recent5Namelog[i+1] = Master.recent5Namelog[i];
        Master.recent5Pricelog[i+1] = Master.recent5Pricelog[i];
      }
      Master.recent5Namelog[0] = productList[select].buffName;
      Master.recent5Pricelog[0] = productList[select].buffprice;
      Master.totalPrice+=productList[select].buffprice;
    }
    else{
      Master.recent5Namelog[0] = productList[select].buffName;
      Master.recent5Pricelog[0] = productList[select].buffprice;
      Master.totalPrice+=productList[select].buffprice;
    }
    Serial.println("\nRecent Logs");
    Serial.println();
    for(int i = 0; i<5; i++){
      if(Master.recent5Namelog[i] != 0){
        Serial.print(Master.recent5Namelog[i]);
        Serial.print(" : ");
        Serial.println(Master.recent5Pricelog[i]);
      }
      else{
        break;
      }
    }
    Serial.println();
    Serial.print("Total : ");
    Serial.println(Master.totalPrice);
    Serial.print("\n\n");
    lcd.setCursor(0,0);
    lcd.print("Thank you!");
    lcd.print("        ");
    lcd.setCursor(0,1);
    lcd.print("Total: ");
    lcd.print(Master.totalPrice);
  }
  else{
    Serial.println("승인되지 않은 카드입니다.");
    lcd.setCursor(0,0);
    lcd.print("ErrCode 1: CARD");
    lcd.print("        ");
    lcd.setCursor(0,1);
    lcd.print("UNREGISTERED");
  }
  Serial.println("——————————————");
  delay(2000);
}