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MFRC522的Arduino函數
- /*
- *
- * All the resources for this project:
- * Modified by Aritro Mukherjee
- *
- *
- */
-
- #include <SPI.h>
- #include <MFRC522.h>
-
- #define SS_PIN 10
- #define RST_PIN 9
- MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
-
- void setup()
- {
- Serial.begin(9600); // Initiate a serial communication
- SPI.begin(); // Initiate SPI bus
- mfrc522.PCD_Init(); // Initiate MFRC522
- Serial.println("Approximate your card to the reader...");
- Serial.println();
- }
- void loop()
- {
- // Look for new cards
- if ( ! mfrc522.PICC_IsNewCardPresent())
- {
- return;
- }
- // Select one of the cards
- if ( ! mfrc522.PICC_ReadCardSerial())
- {
- return;
- }
- //Show UID on serial monitor
- Serial.print("UID 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));
- }
- Serial.println();
- Serial.print("Message : ");
- content.toUpperCase();
- if (content.substring(1) == "BD 31 15 2B") //change here the UID of the card/cards that you want to give access
- {
- Serial.println("Authorized access");
- Serial.println();
- delay(3000);
- }
-
- else {
- Serial.println(" Access denied");
- delay(3000);
- }
- }
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