¾Ë¸®¿¡¼­ ÆÄ´Â nfc card reader/writer.... °ªÀԷ½ÿ¡ ¼ýÀÚ¿Ü ±âÈ£°ªµµ ÀÔ·ÂÀÌ ¾ÈµÇ³ª¿ä?

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상기 제품들은  nfc 공 태그/카드에 값(숫자)를 넣는(wirte)하거나 write된 카드를 읽는 기기로 알고 있는데요

사용예제 동영상이나 기기의 키를 보면 기호값은 없네요.  space나 * & + 같은것들요...

현관에 도어락키도 저런태그를 이용해서 비밀번호 입력해놓고 갖다대기만 하면 열리게(비번일일이 안 눌러도) 하는방식인데

현관도어락도 최소 * # 같은 기호는 있는데 저런것들은 없네요...


저것들은 숫자값만 있는 카드(태그)를 만들때만 쓰는건가요?





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위의 nfc ring같은 경우는 안드로이드 앱에서 컨트롤하고 값을 입력해도 원하는 기호값도 다 넣을 수 있는데...






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