64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
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#include <SPI.h>
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#include <MFRC522.h>
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#define RST_PIN 5 // Configurable, see typical pin layout above
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#define SS_PIN 23 // Configurable, see typical pin layout above
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MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
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//*****************************************************************************************//
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void setup() {
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Serial.begin(115200);
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SPI.begin(22, 19, 18, 23); // Init SPI bus
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mfrc522.PCD_Init(); // Init MFRC522 card
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}
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/**
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* Helper routine to dump a byte array as hex values to Serial.
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*/
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void PrintHex(byte *buffer, byte bufferSize) {
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for (byte i = 0; i < bufferSize; i++) {
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Serial.print(buffer[i] < 0x10 ? " 0" : " ");
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Serial.print(buffer[i], HEX);
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}
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}
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//*****************************************************************************************//
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void loop() {
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// Look for new cards
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if ( !mfrc522.PICC_IsNewCardPresent()) {
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return;
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}
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if ( !mfrc522.PICC_ReadCardSerial()) {
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return;
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}
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//mfrc522.PICC_DumpDetailsToSerial(&(mfrc522.uid)); //dump some details about the card
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Serial.print("NewCard");
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PrintHex(mfrc522.uid.uidByte, mfrc522.uid.size);
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Serial.println("");
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// Check if Card was removed
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bool cardRemoved = false;
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int counter = 0;
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bool current, previous;
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previous = !mfrc522.PICC_IsNewCardPresent();
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while(!cardRemoved){
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current =!mfrc522.PICC_IsNewCardPresent();
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if (current && previous) counter++;
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previous = current;
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cardRemoved = (counter>2);
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delay(50);
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}
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Serial.println("Card was removed");
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delay(500); //change value if you want to read cards faster
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mfrc522.PICC_HaltA();
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mfrc522.PCD_StopCrypto1();
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}
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