mirror of https://github.com/arendst/Tasmota.git
128 lines
4.5 KiB
C++
128 lines
4.5 KiB
C++
/*
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* --------------------------------------------------------------------------------------------------------------------
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* Example sketch/program showing how to read new NUID from a PICC to serial.
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* --------------------------------------------------------------------------------------------------------------------
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* This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
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*
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* Example sketch/program showing how to the read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID
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* Reader on the Arduino SPI interface.
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*
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* When the Arduino and the MFRC522 module are connected (see the pin layout below), load this sketch into Arduino IDE
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* then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When
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* you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output
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* will show the type, and the NUID if a new card has been detected. Note: you may see "Timeout in communication" messages
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* when removing the PICC from reading distance too early.
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*
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* @license Released into the public domain.
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*
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* Typical pin layout used:
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* -----------------------------------------------------------------------------------------
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* MFRC522 Arduino Arduino Arduino Arduino Arduino
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* Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro
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* Signal Pin Pin Pin Pin Pin Pin
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* -----------------------------------------------------------------------------------------
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* RST/Reset RST 9 5 D9 RESET/ICSP-5 RST
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* SPI SS SDA(SS) 10 53 D10 10 10
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* SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
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* SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
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* SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
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*/
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#include <SPI.h>
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#include <MFRC522.h>
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#define SS_PIN 10
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#define RST_PIN 9
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MFRC522 rfid(SS_PIN, RST_PIN); // Instance of the class
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MFRC522::MIFARE_Key key;
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// Init array that will store new NUID
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byte nuidPICC[4];
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void setup() {
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Serial.begin(9600);
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SPI.begin(); // Init SPI bus
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rfid.PCD_Init(); // Init MFRC522
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for (byte i = 0; i < 6; i++) {
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key.keyByte[i] = 0xFF;
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}
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Serial.println(F("This code scan the MIFARE Classsic NUID."));
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Serial.print(F("Using the following key:"));
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printHex(key.keyByte, MFRC522::MF_KEY_SIZE);
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}
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void loop() {
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// Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
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if ( ! rfid.PICC_IsNewCardPresent())
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return;
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// Verify if the NUID has been readed
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if ( ! rfid.PICC_ReadCardSerial())
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return;
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Serial.print(F("PICC type: "));
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MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
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Serial.println(rfid.PICC_GetTypeName(piccType));
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// Check is the PICC of Classic MIFARE type
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if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&
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piccType != MFRC522::PICC_TYPE_MIFARE_1K &&
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piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
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Serial.println(F("Your tag is not of type MIFARE Classic."));
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return;
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}
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if (rfid.uid.uidByte[0] != nuidPICC[0] ||
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rfid.uid.uidByte[1] != nuidPICC[1] ||
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rfid.uid.uidByte[2] != nuidPICC[2] ||
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rfid.uid.uidByte[3] != nuidPICC[3] ) {
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Serial.println(F("A new card has been detected."));
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// Store NUID into nuidPICC array
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for (byte i = 0; i < 4; i++) {
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nuidPICC[i] = rfid.uid.uidByte[i];
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}
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Serial.println(F("The NUID tag is:"));
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Serial.print(F("In hex: "));
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printHex(rfid.uid.uidByte, rfid.uid.size);
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Serial.println();
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Serial.print(F("In dec: "));
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printDec(rfid.uid.uidByte, rfid.uid.size);
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Serial.println();
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}
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else Serial.println(F("Card read previously."));
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// Halt PICC
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rfid.PICC_HaltA();
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// Stop encryption on PCD
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rfid.PCD_StopCrypto1();
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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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* Helper routine to dump a byte array as dec values to Serial.
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*/
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void printDec(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], DEC);
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}
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}
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